These tools are for processing planet.gpx, an enormous CSV file consisting of point coordinates. Get it here.
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filter_points.pl
Extract points inside a polygon specified by a osmosis' poly file or a number of them (or just a bbox). Can be used to make a regional extracts of planet.gpx.
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gpx2bitiles.pl
Renders planet.gpx or its part into "bitiles": bit arrays that can later be rendered into regular png images.
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clean_bitiles.pl
Clean bitiles of salt-and-pepper type noise (there's a lot of it between latitudes -28.65 and 28.65).
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bitiles2png.pl
Convert bitiles to png images and generate low zoom tiles from them.
You can create antialiased low zoom tiles using this tool.
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Make a regional extract for Austria.
xz -cdv gps-points.csv.xz | perl filter-points.pl -p austria.poly | xz > austria.csv.xz
Result:
austria.csv.xz
with every point that lies inside austria.poly polygon. -
Make regional extracts for Austria and Germany simultaneously.
Create a file regions.lst with the following two lines:
poly/europe/austria.poly poly/europe/germany.poly
Run a script:
xz -cdv gps-points.csv.xz | perl filter-points.pl -l regions.lst -o extracts -z
Result: two files in
extracts
directory,austria.csv.gz
andgermany.csv.gz
(gzipped because of-z
switch). -
Create zoom 12 bitiles for Australia.
xz -cdv gps-points.csv.xz | perl gpx2bitiles.pl -b 112,-44,154,-10 -o ausbitiles -z 12
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The same, but in three processes.
Run the following commands simultaneously (in different windows or processes):
xz -cdv gps-points.csv.xz | perl gpx2bitiles.pl -b 112,-44,154,-10 -o ausbitiles -z 12 -t 1,3 xz -cdv gps-points.csv.xz | perl gpx2bitiles.pl -b 112,-44,154,-10 -o ausbitiles -z 12 -t 2,3 xz -cdv gps-points.csv.xz | perl gpx2bitiles.pl -b 112,-44,154,-10 -o ausbitiles -z 12 -t 3,3
During its run, gpx2bitiles script creates temporary files
gpx2bitiles.state*
. Those files are needed in case something happens: processing a CSV file can take several days, and this is a mean to resume processing. If you have stopped the script and do not intend on resuming, do not forget to delete state files. -
Remove noise from generated bitiles.
perl clean_bitiles.pl -i ausbitiles -o acbitiles
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Create PNG tiles for Australia, zoom levels 0 to 12.
perl bitiles2png.pl -i acbitiles -o austiles -0 -v
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Create PNG tiles for Sydney with light green dots, zooms 5 to 12. Write empty tiles where there are no points (JOSM requires them).
perl bitiles2png.pl -i acbitiles -o sydneytiles -b 150.8,-34.1,151.4,-33.6 -z 12 -u 5 -c 0,255,0 -e -v
Written by Ilya Zverev. All scripts are under WTFPL license: you can do whatever you want with them. Please do not make regional extracts or tiles of your cat. Thanks.