Adapted coding style. Added the current version of the GPL 2.
This commit is contained in:
Tobias Leupold
parent
62d1cd2843
commit
1f29891b5d
41
COPYING
41
COPYING
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@ -1,12 +1,12 @@
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GNU GENERAL PUBLIC LICENSE
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Version 2, June 1991
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GNU GENERAL PUBLIC LICENSE
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Version 2, June 1991
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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Preamble
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Preamble
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The licenses for most software are designed to take away your
|
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freedom to share and change it. By contrast, the GNU General Public
|
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|
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@ -15,7 +15,7 @@ software--to make sure the software is free for all its users. This
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|||
General Public License applies to most of the Free Software
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||||
Foundation's software and to any other program whose authors commit to
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||||
using it. (Some other Free Software Foundation software is covered by
|
||||
the GNU Library General Public License instead.) You can apply it to
|
||||
the GNU Lesser General Public License instead.) You can apply it to
|
||||
your programs, too.
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||||
|
||||
When we speak of free software, we are referring to freedom, not
|
||||
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@ -55,8 +55,8 @@ patent must be licensed for everyone's free use or not licensed at all.
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The precise terms and conditions for copying, distribution and
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||||
modification follow.
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GNU GENERAL PUBLIC LICENSE
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||||
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GNU GENERAL PUBLIC LICENSE
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||||
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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||||
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0. This License applies to any program or other work which contains
|
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@ -110,7 +110,7 @@ above, provided that you also meet all of these conditions:
|
|||
License. (Exception: if the Program itself is interactive but
|
||||
does not normally print such an announcement, your work based on
|
||||
the Program is not required to print an announcement.)
|
||||
|
||||
|
||||
These requirements apply to the modified work as a whole. If
|
||||
identifiable sections of that work are not derived from the Program,
|
||||
and can be reasonably considered independent and separate works in
|
||||
|
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@ -168,7 +168,7 @@ access to copy from a designated place, then offering equivalent
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|||
access to copy the source code from the same place counts as
|
||||
distribution of the source code, even though third parties are not
|
||||
compelled to copy the source along with the object code.
|
||||
|
||||
|
||||
4. You may not copy, modify, sublicense, or distribute the Program
|
||||
except as expressly provided under this License. Any attempt
|
||||
otherwise to copy, modify, sublicense or distribute the Program is
|
||||
|
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@ -225,7 +225,7 @@ impose that choice.
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|||
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||||
This section is intended to make thoroughly clear what is believed to
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||||
be a consequence of the rest of this License.
|
||||
|
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8. If the distribution and/or use of the Program is restricted in
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||||
certain countries either by patents or by copyrighted interfaces, the
|
||||
original copyright holder who places the Program under this License
|
||||
|
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@ -255,7 +255,7 @@ make exceptions for this. Our decision will be guided by the two goals
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|||
of preserving the free status of all derivatives of our free software and
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of promoting the sharing and reuse of software generally.
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NO WARRANTY
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||||
NO WARRANTY
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||||
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11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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||||
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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||||
|
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@ -277,9 +277,9 @@ YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
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PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGES.
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END OF TERMS AND CONDITIONS
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How to Apply These Terms to Your New Programs
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END OF TERMS AND CONDITIONS
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How to Apply These Terms to Your New Programs
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If you develop a new program, and you want it to be of the greatest
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possible use to the public, the best way to achieve this is to make it
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|
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@ -303,17 +303,16 @@ the "copyright" line and a pointer to where the full notice is found.
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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||||
You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Also add information on how to contact you by electronic and paper mail.
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If the program is interactive, make it output a short notice like this
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when it starts in an interactive mode:
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Gnomovision version 69, Copyright (C) year name of author
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Gnomovision version 69, Copyright (C) year name of author
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Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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This is free software, and you are welcome to redistribute it
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under certain conditions; type `show c' for details.
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@ -336,5 +335,5 @@ necessary. Here is a sample; alter the names:
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This General Public License does not permit incorporating your program into
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proprietary programs. If your program is a subroutine library, you may
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||||
consider it more useful to permit linking proprietary applications with the
|
||||
library. If this is what you want to do, use the GNU Library General
|
||||
library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License.
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|
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26
ChangeLog
26
ChangeLog
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@ -1,19 +1,23 @@
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2013-11-07 Tobias Leupold <tobias.leupold@web.de> (Version 0.1.2)
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* Fixed crash when processing GPX files with empty or no path segments. Thanks to Fabian Seitz for the bug report!
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* Added exception handler for non-readable or non-existant files or files with no valid GPX data.
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* Fixed crash when processing GPX files with empty or no path segments.
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Thanks to Fabian Seitz for the bug report!
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* Added exception handler for non-readable or non-existant files or files with no valid GPX
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data.
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2012-08-26 Tobias Leupold <tobias.leupold@web.de> (Version 0.1.1)
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* Made the internal data structure simpler. Don't store the IDs of the tracks.
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* Combine path segments before doing the Mercator projection, so that rounding errors can't affect the search.
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* Made the algorithm to search for combinable paths more effective.
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* Draw circles instead of single points (that will not be shown). Added an command line option to drop such single points.
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* Made the internal data structure simpler. Don't store the IDs of the tracks.
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* Combine path segments before doing the Mercator projection, so that rounding errors can't
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affect the search.
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* Made the algorithm to search for combinable paths more effective.
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* Draw circles instead of single points (that will not be shown). Added an command line option
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to drop such single points.
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2012-08-25 Tobias Leupold <tobias.leupold@web.de> (Version 0.1)
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* Initial release
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* Initial release
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646
gpx2svg
646
gpx2svg
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@ -25,358 +25,318 @@ import math
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from xml.dom.minidom import parse as parseXml
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def parseGpx(gpxFile):
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"""Get the latitude and longitude data of all track segments in a GPX file"""
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# Get the XML information
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try:
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gpx = parseXml(gpxFile)
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except IOError as error:
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print('Error while reading file: %s. Terminating.' % error, file = sys.stderr)
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sys.exit(1)
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except:
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print('Error while parsing XML data:', file = sys.stderr)
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print(sys.exc_info(), file = sys.stderr)
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print('Terminating.', file = sys.stderr)
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sys.exit(1)
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# Iterate over all tracks, track segments and points
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gpsData = []
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for track in gpx.getElementsByTagName('trk'):
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for trackseg in track.getElementsByTagName('trkseg'):
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trackSegData = []
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for point in trackseg.getElementsByTagName('trkpt'):
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trackSegData.append((float(point.attributes['lon'].value), float(point.attributes['lat'].value)))
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# Leave out empty segments
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if(trackSegData != []):
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gpsData.append(trackSegData)
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return gpsData
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"""Get the latitude and longitude data of all track segments in a GPX file"""
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# Get the XML information
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try:
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gpx = parseXml(gpxFile)
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except IOError as error:
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print('Error while reading file: %s. Terminating.' % error, file = sys.stderr)
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sys.exit(1)
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except:
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print('Error while parsing XML data:', file = sys.stderr)
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print(sys.exc_info(), file = sys.stderr)
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print('Terminating.', file = sys.stderr)
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sys.exit(1)
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# Iterate over all tracks, track segments and points
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gpsData = []
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for track in gpx.getElementsByTagName('trk'):
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for trackseg in track.getElementsByTagName('trkseg'):
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trackSegData = []
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for point in trackseg.getElementsByTagName('trkpt'):
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trackSegData.append(
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(float(point.attributes['lon'].value), float(point.attributes['lat'].value))
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)
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# Leave out empty segments
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if(trackSegData != []):
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gpsData.append(trackSegData)
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return gpsData
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def calcProjection(gpsData):
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"""Calculate a plane projection for a GPS dataset"""
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projectedData = []
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for segment in gpsData:
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projectedSegment = []
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for coord in segment:
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# At the moment, we only have the Mercator projection
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projectedSegment.append(mercatorProjection(coord))
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projectedData.append(projectedSegment)
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return(projectedData)
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"""Calculate a plane projection for a GPS dataset"""
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projectedData = []
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for segment in gpsData:
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projectedSegment = []
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for coord in segment:
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# At the moment, we only have the Mercator projection
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projectedSegment.append(mercatorProjection(coord))
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projectedData.append(projectedSegment)
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return(projectedData)
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def mercatorProjection(coord):
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"""Calculate the Mercator projection of a coordinate pair"""
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# Assuming we're on earth, we have (according to GRS 80):
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r = 6378137.0
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# As long as meridian = 0 and can't be changed, we don't need:
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# meridian = meridian * math.pi / 180.0
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# x = r * ((coord[0] * math.pi / 180.0) - meridian)
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# Instead, we use this simplified version:
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x = r * coord[0] * math.pi / 180.0
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y = r * math.log(math.tan((math.pi / 4.0) + ((coord[1] * math.pi / 180.0) / 2.0)))
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return((x, y))
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"""Calculate the Mercator projection of a coordinate pair"""
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# Assuming we're on earth, we have (according to GRS 80):
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r = 6378137.0
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# As long as meridian = 0 and can't be changed, we don't need:
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# meridian = meridian * math.pi / 180.0
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# x = r * ((coord[0] * math.pi / 180.0) - meridian)
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# Instead, we use this simplified version:
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x = r * coord[0] * math.pi / 180.0
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y = r * math.log(math.tan((math.pi / 4.0) + ((coord[1] * math.pi / 180.0) / 2.0)))
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return((x, y))
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def moveProjectedData(gpsData):
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"""Move a dataset to 0,0 and return it with the resulting width and height"""
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# Find the minimum and maximum x and y coordinates
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minX = maxX = gpsData[0][0][0]
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minY = maxY = gpsData[0][0][1]
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for segment in gpsData:
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for coord in segment:
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if coord[0] < minX:
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minX = coord[0]
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if coord[0] > maxX:
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maxX = coord[0]
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if coord[1] < minY:
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minY = coord[1]
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if coord[1] > maxY:
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maxY = coord[1]
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# Move the GPS data to 0,0
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movedGpsData = []
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for segment in gpsData:
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movedSegment = []
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for coord in segment:
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movedSegment.append((coord[0] - minX, coord[1] - minY))
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movedGpsData.append(movedSegment)
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# Return the moved data and it's width and height
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return(movedGpsData, maxX - minX, maxY - minY)
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"""Move a dataset to 0,0 and return it with the resulting width and height"""
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# Find the minimum and maximum x and y coordinates
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minX = maxX = gpsData[0][0][0]
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minY = maxY = gpsData[0][0][1]
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for segment in gpsData:
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for coord in segment:
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if coord[0] < minX:
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minX = coord[0]
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if coord[0] > maxX:
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maxX = coord[0]
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if coord[1] < minY:
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minY = coord[1]
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if coord[1] > maxY:
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maxY = coord[1]
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# Move the GPS data to 0,0
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movedGpsData = []
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for segment in gpsData:
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movedSegment = []
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for coord in segment:
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movedSegment.append((coord[0] - minX, coord[1] - minY))
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movedGpsData.append(movedSegment)
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# Return the moved data and it's width and height
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return(movedGpsData, maxX - minX, maxY - minY)
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def searchCircularSegments(gpsData):
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"""Splits a GPS dataset to tracks that are circular and other tracks"""
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circularSegments = []
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straightSegments = []
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for segment in gpsData:
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if segment[0] == segment[len(segment) - 1]:
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circularSegments.append(segment)
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else:
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straightSegments.append(segment)
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return(circularSegments, straightSegments)
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"""Splits a GPS dataset to tracks that are circular and other tracks"""
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circularSegments = []
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straightSegments = []
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for segment in gpsData:
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if segment[0] == segment[len(segment) - 1]:
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circularSegments.append(segment)
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else:
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straightSegments.append(segment)
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return(circularSegments, straightSegments)
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def combineSegmentPairs(gpsData):
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"""Combine segment pairs to one bigger segment"""
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combinedData = []
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# Walk through the GPS data and search for segment pairs that end with the starting point of another track
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while len(gpsData) > 0:
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# Get one segment from the source GPS data
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firstTrackData = gpsData.pop()
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foundMatch = False
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# Try to find a matching segment
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for i in range(len(gpsData)):
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if firstTrackData[len(firstTrackData) - 1] == gpsData[i][0]:
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# There is a matching segment, so break here
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foundMatch = True
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break
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if foundMatch == True:
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# We found a pair of segments with one shared point, so pop the data of the second
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# segment from the source GPS data and create a new segment containing all data, but
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# without the overlapping point
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firstTrackData.pop()
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combinedData.append(firstTrackData + gpsData[i])
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gpsData.pop(i)
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else:
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# No segment with a shared point was found, so just append the data to the output
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combinedData.append(firstTrackData)
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return(searchCircularSegments(combinedData))
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|
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"""Combine segment pairs to one bigger segment"""
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combinedData = []
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# Walk through the GPS data and search for segment pairs
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# that end with the starting point of another track
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while len(gpsData) > 0:
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# Get one segment from the source GPS data
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firstTrackData = gpsData.pop()
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foundMatch = False
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|
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# Try to find a matching segment
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for i in range(len(gpsData)):
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if firstTrackData[len(firstTrackData) - 1] == gpsData[i][0]:
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# There is a matching segment, so break here
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foundMatch = True
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break
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|
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if foundMatch == True:
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# We found a pair of segments with one shared point, so pop the data of the second
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# segment from the source GPS data and create a new segment containing all data, but
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# without the overlapping point
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firstTrackData.pop()
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combinedData.append(firstTrackData + gpsData[i])
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gpsData.pop(i)
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else:
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# No segment with a shared point was found, so just append the data to the output
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combinedData.append(firstTrackData)
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return(searchCircularSegments(combinedData))
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|
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def combineSegments(gpsData):
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|
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"""Combine all segments of a GPS dataset that can be combined"""
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|
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# Search for circular segments. We can't combine them with any other segment.
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circularSegments, remainingSegments = searchCircularSegments(gpsData)
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|
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# Search for segments that can be combined
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|
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while True:
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|
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# Look how many tracks we have now
|
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segmentsBefore = len(remainingSegments)
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|
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# Search for segments that can be combined
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newCircularSegments, remainingSegments = combineSegmentPairs(remainingSegments)
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|
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# Add newly found circular segments to processedSegments -- they can't be used anymore
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circularSegments = circularSegments + newCircularSegments
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|
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if segmentsBefore == len(remainingSegments):
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# combineSegmentPairs() did not reduce the number of tracks anymore,
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# so we can't combine more tracks and can stop here
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break
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return(circularSegments + remainingSegments)
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|
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"""Combine all segments of a GPS dataset that can be combined"""
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|
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# Search for circular segments. We can't combine them with any other segment.
|
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circularSegments, remainingSegments = searchCircularSegments(gpsData)
|
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|
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# Search for segments that can be combined
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while True:
|
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# Look how many tracks we have now
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segmentsBefore = len(remainingSegments)
|
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|
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# Search for segments that can be combined
|
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newCircularSegments, remainingSegments = combineSegmentPairs(remainingSegments)
|
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|
||||
# Add newly found circular segments to processedSegments -- they can't be used anymore
|
||||
circularSegments = circularSegments + newCircularSegments
|
||||
|
||||
if segmentsBefore == len(remainingSegments):
|
||||
# combineSegmentPairs() did not reduce the number of tracks anymore,
|
||||
# so we can't combine more tracks and can stop here
|
||||
break
|
||||
|
||||
return(circularSegments + remainingSegments)
|
||||
|
||||
def scaleCoords(coord, height, scale):
|
||||
"""Return a scaled pair of coordinates"""
|
||||
return(coord[0] * scale, (coord[1] * -1 + height) * scale)
|
||||
|
||||
"""Return a scaled pair of coordinates"""
|
||||
return(coord[0] * scale, (coord[1] * -1 + height) * scale)
|
||||
|
||||
def createCoordString(segment, height, scale):
|
||||
|
||||
"""Create the coordinate part of an SVG path string from a GPS data segment"""
|
||||
|
||||
coordString = ''
|
||||
|
||||
for coord in segment:
|
||||
x, y = scaleCoords(coord, height, scale)
|
||||
coordString = coordString + ' ' + str(x) + ',' + str(y)
|
||||
|
||||
return coordString
|
||||
|
||||
"""Create the coordinate part of an SVG path string from a GPS data segment"""
|
||||
|
||||
coordString = ''
|
||||
for coord in segment:
|
||||
x, y = scaleCoords(coord, height, scale)
|
||||
coordString = coordString + ' ' + str(x) + ',' + str(y)
|
||||
|
||||
return coordString
|
||||
|
||||
def createPathString(drawCommand):
|
||||
"""Return a complete path element for a draw command string"""
|
||||
return '<path d="' + drawCommand + '" style="fill:none;stroke:black" />\n'
|
||||
|
||||
"""Return a complete path element for a draw command string"""
|
||||
return '<path d="' + drawCommand + '" style="fill:none;stroke:black" />\n'
|
||||
|
||||
def writeSvgData(gpsData, width, height, maxPixels, dropSinglePoints, outfile):
|
||||
|
||||
"""Output the SVG data -- quick 'n' dirty, without messing around with dom stuff ;-)"""
|
||||
|
||||
# Calculate the scale factor we need to fit the requested maximal output size
|
||||
if width <= maxPixels and height <= maxPixels:
|
||||
scale = 1
|
||||
elif width > height:
|
||||
scale = maxPixels / width
|
||||
else:
|
||||
scale = maxPixels / height
|
||||
|
||||
# Open the requested output file or map to /dev/stdout
|
||||
if outfile != '/dev/stdout':
|
||||
fp = open(outfile, 'w')
|
||||
else:
|
||||
fp = sys.stdout
|
||||
|
||||
# Header data
|
||||
fp.write('<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n')
|
||||
fp.write('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"\n "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n')
|
||||
fp.write('<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="%spx" height="%spx">\n' % (width * scale, height * scale))
|
||||
|
||||
# Process all track segments and generate ids and path drawing commands for them
|
||||
|
||||
# First, we split the data to circular and straight segments
|
||||
circularSegments, straightSegments = searchCircularSegments(gpsData)
|
||||
|
||||
realCircularSegments = []
|
||||
singlePoints = []
|
||||
|
||||
for segment in circularSegments:
|
||||
|
||||
# We can leave out the last point, because it's equal to the first one
|
||||
segment.pop()
|
||||
|
||||
if len(segment) == 1:
|
||||
# It's a single point
|
||||
if dropSinglePoints == False:
|
||||
# We want to keep single points, so add it to singlePoints
|
||||
singlePoints.append(segment)
|
||||
else:
|
||||
realCircularSegments.append(segment)
|
||||
|
||||
circularSegments = realCircularSegments
|
||||
|
||||
# Draw single points if requested
|
||||
|
||||
if len(singlePoints) > 0:
|
||||
|
||||
fp.write('<g>\n')
|
||||
|
||||
for segment in singlePoints:
|
||||
x, y = scaleCoords(segment[0], height, scale)
|
||||
fp.write('<circle cx="' + str(x) + '" cy="' + str(y) + '" r="0.5" style="stroke:none;fill:black"/>\n')
|
||||
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Draw all circular segments
|
||||
|
||||
if len(circularSegments) > 0:
|
||||
|
||||
fp.write('<g>\n')
|
||||
|
||||
for segment in circularSegments:
|
||||
fp.write(createPathString('M' + createCoordString(segment, height, scale) + ' Z'))
|
||||
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Draw all un-closed paths
|
||||
|
||||
if len(straightSegments) > 0:
|
||||
|
||||
fp.write('<g>\n')
|
||||
|
||||
for segment in straightSegments:
|
||||
d = 'M' + createCoordString(segment, height, scale)
|
||||
fp.write(createPathString('M' + createCoordString(segment, height, scale)))
|
||||
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Close the XML
|
||||
fp.write('</svg>\n')
|
||||
|
||||
# Close the file if necessary
|
||||
if fp != sys.stdout:
|
||||
fp.close()
|
||||
|
||||
"""Output the SVG data -- quick 'n' dirty, without messing around with dom stuff ;-)"""
|
||||
|
||||
# Calculate the scale factor we need to fit the requested maximal output size
|
||||
if width <= maxPixels and height <= maxPixels:
|
||||
scale = 1
|
||||
elif width > height:
|
||||
scale = maxPixels / width
|
||||
else:
|
||||
scale = maxPixels / height
|
||||
|
||||
# Open the requested output file or map to /dev/stdout
|
||||
if outfile != '/dev/stdout':
|
||||
fp = open(outfile, 'w')
|
||||
else:
|
||||
fp = sys.stdout
|
||||
|
||||
# Header data
|
||||
fp.write('<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n')
|
||||
fp.write('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"\n "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n')
|
||||
fp.write(
|
||||
'<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="%spx" height="%spx">\n' % (
|
||||
width * scale, height * scale
|
||||
)
|
||||
)
|
||||
|
||||
# Process all track segments and generate ids and path drawing commands for them
|
||||
|
||||
# First, we split the data to circular and straight segments
|
||||
circularSegments, straightSegments = searchCircularSegments(gpsData)
|
||||
realCircularSegments = []
|
||||
singlePoints = []
|
||||
for segment in circularSegments:
|
||||
# We can leave out the last point, because it's equal to the first one
|
||||
segment.pop()
|
||||
if len(segment) == 1:
|
||||
# It's a single point
|
||||
if dropSinglePoints == False:
|
||||
# We want to keep single points, so add it to singlePoints
|
||||
singlePoints.append(segment)
|
||||
else:
|
||||
realCircularSegments.append(segment)
|
||||
|
||||
circularSegments = realCircularSegments
|
||||
|
||||
# Draw single points if requested
|
||||
if len(singlePoints) > 0:
|
||||
fp.write('<g>\n')
|
||||
for segment in singlePoints:
|
||||
x, y = scaleCoords(segment[0], height, scale)
|
||||
fp.write('<circle cx="' + str(x) + '" cy="' + str(y) + '" r="0.5" style="stroke:none;fill:black"/>\n')
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Draw all circular segments
|
||||
if len(circularSegments) > 0:
|
||||
fp.write('<g>\n')
|
||||
for segment in circularSegments:
|
||||
fp.write(createPathString('M' + createCoordString(segment, height, scale) + ' Z'))
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Draw all un-closed paths
|
||||
if len(straightSegments) > 0:
|
||||
fp.write('<g>\n')
|
||||
for segment in straightSegments:
|
||||
d = 'M' + createCoordString(segment, height, scale)
|
||||
fp.write(createPathString('M' + createCoordString(segment, height, scale)))
|
||||
fp.write('</g>\n')
|
||||
|
||||
# Close the XML
|
||||
fp.write('</svg>\n')
|
||||
|
||||
# Close the file if necessary
|
||||
if fp != sys.stdout:
|
||||
fp.close()
|
||||
|
||||
def main():
|
||||
|
||||
# Setup the command line argument parser
|
||||
|
||||
cmdArgParser = argparse.ArgumentParser(
|
||||
description = 'Convert GPX formatted geodata to Scalable Vector Graphics (SVG)',
|
||||
epilog = 'gpx2svg %s - http://nasauber.de/opensource/gpx2svg/' % __version__
|
||||
)
|
||||
|
||||
cmdArgParser.add_argument(
|
||||
'-i', metavar = 'FILE', nargs = '?', type = str, default = '/dev/stdin',
|
||||
help = 'GPX input file (default: read from STDIN)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-o', metavar = 'FILE', nargs = '?', type = str, default = '/dev/stdout',
|
||||
help = 'SVG output file (default: write to STDOUT)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-m', metavar = 'PIXELS', nargs = '?', type = int, default = 3000,
|
||||
help = 'Maximum width or height of the SVG output in pixels (default: 3000)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-d', action = 'store_true',
|
||||
help = 'Drop single points (default: draw a circle with 1px diameter)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-r', action = 'store_true',
|
||||
help = '"Raw" conversion: Create one SVG path per track segment, don\'t try to combine paths that end with the starting point of another path'
|
||||
)
|
||||
|
||||
# Get the given arguments
|
||||
cmdArgs = cmdArgParser.parse_args()
|
||||
|
||||
# Map "-" to STDIN or STDOUT
|
||||
if cmdArgs.i == '-':
|
||||
cmdArgs.i = '/dev/stdin'
|
||||
if cmdArgs.o == '-':
|
||||
cmdArgs.o = '/dev/stdout'
|
||||
|
||||
# Get the latitude and longitude data from the given GPX file or STDIN
|
||||
gpsData = parseGpx(cmdArgs.i)
|
||||
|
||||
# Check if we actually _have_ data
|
||||
if gpsData == []:
|
||||
print('No data to convert. Terminating.', file = sys.stderr)
|
||||
sys.exit(1)
|
||||
|
||||
# Try to combine all track segments that can be combined if not requested otherwise
|
||||
if not cmdArgs.r:
|
||||
gpsData = combineSegments(gpsData)
|
||||
|
||||
# Calculate a plane projection for a GPS dataset
|
||||
# At the moment, we only have the Mercator projection
|
||||
gpsData = calcProjection(gpsData)
|
||||
|
||||
# Move the projected data to the 0,0 origin of a cartesial coordinate system
|
||||
# and get the raw width and height of the resulting vector data
|
||||
gpsData, width, height = moveProjectedData(gpsData)
|
||||
|
||||
# Write the resulting SVG data to the requested output file or STDOUT
|
||||
writeSvgData(gpsData, width, height, cmdArgs.m, cmdArgs.d, cmdArgs.o)
|
||||
|
||||
|
||||
# Setup the command line argument parser
|
||||
|
||||
cmdArgParser = argparse.ArgumentParser(
|
||||
description = 'Convert GPX formatted geodata to Scalable Vector Graphics (SVG)',
|
||||
epilog = 'gpx2svg %s - http://nasauber.de/opensource/gpx2svg/' % __version__
|
||||
)
|
||||
|
||||
cmdArgParser.add_argument(
|
||||
'-i', metavar = 'FILE', nargs = '?', type = str, default = '/dev/stdin',
|
||||
help = 'GPX input file (default: read from STDIN)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-o', metavar = 'FILE', nargs = '?', type = str, default = '/dev/stdout',
|
||||
help = 'SVG output file (default: write to STDOUT)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-m', metavar = 'PIXELS', nargs = '?', type = int, default = 3000,
|
||||
help = 'Maximum width or height of the SVG output in pixels (default: 3000)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-d', action = 'store_true',
|
||||
help = 'Drop single points (default: draw a circle with 1px diameter)'
|
||||
)
|
||||
cmdArgParser.add_argument(
|
||||
'-r', action = 'store_true',
|
||||
help = (
|
||||
'"Raw" conversion: Create one SVG path per track segment, '
|
||||
'don\'t try to combine paths that end with the starting point of another path'
|
||||
)
|
||||
)
|
||||
|
||||
# Get the given arguments
|
||||
cmdArgs = cmdArgParser.parse_args()
|
||||
|
||||
# Map "-" to STDIN or STDOUT
|
||||
if cmdArgs.i == '-':
|
||||
cmdArgs.i = '/dev/stdin'
|
||||
if cmdArgs.o == '-':
|
||||
cmdArgs.o = '/dev/stdout'
|
||||
|
||||
# Get the latitude and longitude data from the given GPX file or STDIN
|
||||
gpsData = parseGpx(cmdArgs.i)
|
||||
|
||||
# Check if we actually _have_ data
|
||||
if gpsData == []:
|
||||
print('No data to convert. Terminating.', file = sys.stderr)
|
||||
sys.exit(1)
|
||||
|
||||
# Try to combine all track segments that can be combined if not requested otherwise
|
||||
if not cmdArgs.r:
|
||||
gpsData = combineSegments(gpsData)
|
||||
|
||||
# Calculate a plane projection for a GPS dataset
|
||||
# At the moment, we only have the Mercator projection
|
||||
gpsData = calcProjection(gpsData)
|
||||
|
||||
# Move the projected data to the 0,0 origin of a cartesial coordinate system
|
||||
# and get the raw width and height of the resulting vector data
|
||||
gpsData, width, height = moveProjectedData(gpsData)
|
||||
|
||||
# Write the resulting SVG data to the requested output file or STDOUT
|
||||
writeSvgData(gpsData, width, height, cmdArgs.m, cmdArgs.d, cmdArgs.o)
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
|
||||
main()
|
||||
|
|
|
|||
Loading…
Reference in New Issue