Initial commit: Copy of svn rev 736.
This commit is contained in:
commit
62d1cd2843
|
@ -0,0 +1,340 @@
|
|||
GNU GENERAL PUBLIC LICENSE
|
||||
Version 2, June 1991
|
||||
|
||||
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
||||
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
Preamble
|
||||
|
||||
The licenses for most software are designed to take away your
|
||||
freedom to share and change it. By contrast, the GNU General Public
|
||||
License is intended to guarantee your freedom to share and change free
|
||||
software--to make sure the software is free for all its users. This
|
||||
General Public License applies to most of the Free Software
|
||||
Foundation's software and to any other program whose authors commit to
|
||||
using it. (Some other Free Software Foundation software is covered by
|
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the GNU Library 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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price. Our General Public Licenses are designed to make sure that you
|
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have the freedom to distribute copies of free software (and charge for
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this service if you wish), that you receive source code or can get it
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if you want it, that you can change the software or use pieces of it
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To protect your rights, we need to make restrictions that forbid
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These restrictions translate to certain responsibilities for you if you
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For example, if you distribute copies of such a program, whether
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We protect your rights with two steps: (1) copyright the software, and
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Also, for each author's protection and ours, we want to make certain
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Finally, any free program is threatened constantly by software
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The precise terms and conditions for copying, distribution and
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||||
GNU GENERAL PUBLIC LICENSE
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||||
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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||||
0. This License applies to any program or other work which contains
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Whether that is true depends on what the Program does.
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These requirements apply to the modified work as a whole. If
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Thus, it is not the intent of this section to claim rights or contest
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The source code for a work means the preferred form of the work for
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If any portion of this section is held invalid or unenforceable under
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It is not the purpose of this section to induce you to infringe any
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This section is intended to make thoroughly clear what is believed to
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8. If the distribution and/or use of the Program is restricted in
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||||
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||||
9. The Free Software Foundation may publish revised and/or new versions
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Each version is given a distinguishing version number. If the Program
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|
||||
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10. If you wish to incorporate parts of the Program into other free
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NO WARRANTY
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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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OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
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YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
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||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
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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|
||||
To do so, attach the following notices to the program. It is safest
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<one line to give the program's name and a brief idea of what it does.>
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Copyright (C) <year> <name of author>
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|
||||
This program is free software; you can redistribute it and/or modify
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the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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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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|
||||
|
||||
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
|
||||
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
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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|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
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parts of the General Public License. Of course, the commands you use may
|
||||
be called something other than `show w' and `show c'; they could even be
|
||||
mouse-clicks or menu items--whatever suits your program.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or your
|
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school, if any, to sign a "copyright disclaimer" for the program, if
|
||||
necessary. Here is a sample; alter the names:
|
||||
|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1989
|
||||
Ty Coon, President of Vice
|
||||
|
||||
This General Public License does not permit incorporating your program into
|
||||
proprietary programs. If your program is a subroutine library, you may
|
||||
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
|
||||
Public License instead of this License.
|
|
@ -0,0 +1,19 @@
|
|||
2013-11-07 Tobias Leupold <tobias.leupold@web.de> (Version 0.1.2)
|
||||
|
||||
* Fixed crash when processing GPX files with empty or no path segments. Thanks to Fabian Seitz for the bug report!
|
||||
|
||||
* Added exception handler for non-readable or non-existant files or files with no valid GPX data.
|
||||
|
||||
2012-08-26 Tobias Leupold <tobias.leupold@web.de> (Version 0.1.1)
|
||||
|
||||
* Made the internal data structure simpler. Don't store the IDs of the tracks.
|
||||
|
||||
* Combine path segments before doing the Mercator projection, so that rounding errors can't affect the search.
|
||||
|
||||
* Made the algorithm to search for combinable paths more effective.
|
||||
|
||||
* Draw circles instead of single points (that will not be shown). Added an command line option to drop such single points.
|
||||
|
||||
2012-08-25 Tobias Leupold <tobias.leupold@web.de> (Version 0.1)
|
||||
|
||||
* Initial release
|
|
@ -0,0 +1,382 @@
|
|||
#!/usr/bin/python3
|
||||
|
||||
# Copyright (c) 2012-2014 Tobias Leupold <tobias.leupold@web.de>
|
||||
#
|
||||
# gpx2svg - Convert GPX formatted geodata to Scalable Vector Graphics (SVG)
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU General Public License as published by the Free
|
||||
# Software Foundation in version 2 of the License.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful, but
|
||||
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
# for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License along
|
||||
# with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||
|
||||
__version__ = 'svn' #'0.1.2'
|
||||
|
||||
import argparse
|
||||
import sys
|
||||
import math
|
||||
from xml.dom.minidom import parse as parseXml
|
||||
|
||||
def parseGpx(gpxFile):
|
||||
|
||||
"""Get the latitude and longitude data of all track segments in a GPX file"""
|
||||
|
||||
# Get the XML information
|
||||
try:
|
||||
gpx = parseXml(gpxFile)
|
||||
except IOError as error:
|
||||
print('Error while reading file: %s. Terminating.' % error, file = sys.stderr)
|
||||
sys.exit(1)
|
||||
except:
|
||||
print('Error while parsing XML data:', file = sys.stderr)
|
||||
print(sys.exc_info(), file = sys.stderr)
|
||||
print('Terminating.', file = sys.stderr)
|
||||
sys.exit(1)
|
||||
|
||||
# Iterate over all tracks, track segments and points
|
||||
|
||||
gpsData = []
|
||||
|
||||
for track in gpx.getElementsByTagName('trk'):
|
||||
|
||||
for trackseg in track.getElementsByTagName('trkseg'):
|
||||
|
||||
trackSegData = []
|
||||
|
||||
for point in trackseg.getElementsByTagName('trkpt'):
|
||||
trackSegData.append((float(point.attributes['lon'].value), float(point.attributes['lat'].value)))
|
||||
|
||||
# Leave out empty segments
|
||||
if(trackSegData != []):
|
||||
gpsData.append(trackSegData)
|
||||
|
||||
return gpsData
|
||||
|
||||
def calcProjection(gpsData):
|
||||
|
||||
"""Calculate a plane projection for a GPS dataset"""
|
||||
|
||||
projectedData = []
|
||||
|
||||
for segment in gpsData:
|
||||
|
||||
projectedSegment = []
|
||||
|
||||
for coord in segment:
|
||||
# At the moment, we only have the Mercator projection
|
||||
projectedSegment.append(mercatorProjection(coord))
|
||||
|
||||
projectedData.append(projectedSegment)
|
||||
|
||||
return(projectedData)
|
||||
|
||||
def mercatorProjection(coord):
|
||||
|
||||
"""Calculate the Mercator projection of a coordinate pair"""
|
||||
|
||||
# Assuming we're on earth, we have (according to GRS 80):
|
||||
r = 6378137.0
|
||||
|
||||
# As long as meridian = 0 and can't be changed, we don't need:
|
||||
# meridian = meridian * math.pi / 180.0
|
||||
# x = r * ((coord[0] * math.pi / 180.0) - meridian)
|
||||
# Instead, we use this simplified version:
|
||||
x = r * coord[0] * math.pi / 180.0
|
||||
|
||||
y = r * math.log(math.tan((math.pi / 4.0) + ((coord[1] * math.pi / 180.0) / 2.0)))
|
||||
|
||||
return((x, y))
|
||||
|
||||
def moveProjectedData(gpsData):
|
||||
|
||||
"""Move a dataset to 0,0 and return it with the resulting width and height"""
|
||||
|
||||
# Find the minimum and maximum x and y coordinates
|
||||
|
||||
minX = maxX = gpsData[0][0][0]
|
||||
minY = maxY = gpsData[0][0][1]
|
||||
|
||||
for segment in gpsData:
|
||||
for coord in segment:
|
||||
if coord[0] < minX:
|
||||
minX = coord[0]
|
||||
if coord[0] > maxX:
|
||||
maxX = coord[0]
|
||||
if coord[1] < minY:
|
||||
minY = coord[1]
|
||||
if coord[1] > maxY:
|
||||
maxY = coord[1]
|
||||
|
||||
# Move the GPS data to 0,0
|
||||
|
||||
movedGpsData = []
|
||||
|
||||
for segment in gpsData:
|
||||
|
||||
movedSegment = []
|
||||
|
||||
for coord in segment:
|
||||
movedSegment.append((coord[0] - minX, coord[1] - minY))
|
||||
|
||||
movedGpsData.append(movedSegment)
|
||||
|
||||
# Return the moved data and it's width and height
|
||||
return(movedGpsData, maxX - minX, maxY - minY)
|
||||
|
||||
def searchCircularSegments(gpsData):
|
||||
|
||||
"""Splits a GPS dataset to tracks that are circular and other tracks"""
|
||||
|
||||
circularSegments = []
|
||||
straightSegments = []
|
||||
|
||||
for segment in gpsData:
|
||||
if segment[0] == segment[len(segment) - 1]:
|
||||
circularSegments.append(segment)
|
||||
else:
|
||||
straightSegments.append(segment)
|
||||
|
||||
return(circularSegments, straightSegments)
|
||||
|
||||
def combineSegmentPairs(gpsData):
|
||||
|
||||
"""Combine segment pairs to one bigger segment"""
|
||||
|
||||
combinedData = []
|
||||
|
||||
# Walk through the GPS data and search for segment pairs that end with the starting point of another track
|
||||
|
||||
while len(gpsData) > 0:
|
||||
|
||||
# Get one segment from the source GPS data
|
||||
firstTrackData = gpsData.pop()
|
||||
|
||||
foundMatch = False
|
||||
|
||||
# Try to find a matching segment
|
||||
for i in range(len(gpsData)):
|
||||
if firstTrackData[len(firstTrackData) - 1] == gpsData[i][0]:
|
||||
# There is a matching segment, so break here
|
||||
foundMatch = True
|
||||
break
|
||||
|
||||
if foundMatch == True:
|
||||
# We found a pair of segments with one shared point, so pop the data of the second
|
||||
# segment from the source GPS data and create a new segment containing all data, but
|
||||
# without the overlapping point
|
||||
firstTrackData.pop()
|
||||
combinedData.append(firstTrackData + gpsData[i])
|
||||
gpsData.pop(i)
|
||||
else:
|
||||
# No segment with a shared point was found, so just append the data to the output
|
||||
combinedData.append(firstTrackData)
|
||||
|
||||
return(searchCircularSegments(combinedData))
|
||||
|
||||
def combineSegments(gpsData):
|
||||
|
||||
"""Combine all segments of a GPS dataset that can be combined"""
|
||||
|
||||
# Search for circular segments. We can't combine them with any other segment.
|
||||
circularSegments, remainingSegments = searchCircularSegments(gpsData)
|
||||
|
||||
# Search for segments that can be combined
|
||||
|
||||
while True:
|
||||
|
||||
# Look how many tracks we have now
|
||||
segmentsBefore = len(remainingSegments)
|
||||
|
||||
# Search for segments that can be combined
|
||||
newCircularSegments, remainingSegments = combineSegmentPairs(remainingSegments)
|
||||
|
||||
# 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)
|
||||
|
||||
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
|
||||
|
||||
def createPathString(drawCommand):
|
||||
"""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()
|
||||
|
||||
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)
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
|
Loading…
Reference in New Issue