English Wikipedia @ Freddythechick

English Wikipedia @ Freddythechick:Graphic Lab/Resources/Wikimaps atlas/Lesson 1

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master.makefile (0%)

Action: When run, this master.makefile runs other layer-specialized sub-makefiles. These sub-makefiles download the GIS sources, process them, output topojson file(s) which nodejs, jsdom, and D3js code can convert into stand alone SVGs.

master.makefile

<syntaxhighlight lang="make">

</syntaxhighlight>

Example
<syntaxhighlight lang="bash">

cd ./home/.../wikimaps/ make -f master.makefile WEST=-5.8 NORTH=51.5 EAST=10.0 SOUTH=41.0 ITEM=France </syntaxhighlight>

Parameters:

  • WEST=... : Western most longitude value of the frame to map. Accept integer between 90.0⁰ & -90.0⁰.
  • NORTH=... : Northern most latitude value ————. ————.
  • EAST=... : Eastern most longitude value ————. ————.
  • SOUTH= ... : Southern most latitude value ————. ————.
  • ITEM= ... : name of the target/central geographic item, according to Natural_Earth spelling.

shadedrelief.makefile (100%)

Action: When run, this shadedrelief.makefile download the raster GIS DEM sources, process them (unzip, crop, shaded relief, resize), to output an elegant shaded relief png (current) or topojson/svg.

shadedrelief.makefile

<syntaxhighlight lang="make">

  1. ACTION:
  2. When run, this shadedrelief.makefile download the raster GIS DEM sources, process them (unzip, crop, shaded relief, resize), to output an elegant shaded relief png (current) or topojson/svg.
  3. RUN:
  4. cd ~/wikimaps/
  5. make -f shadedrelief.makefile WEST=-5.8 NORTH=51.5 EAST=10.0 SOUTH=41.0 ITEM=France
  6. SOURCES:
  7. http://www.imagemagick.org/script/command-line-options.php#alpha
  1. --------------------------------------------------------------------------
  1. DEFAULT VALUES (customizable):

WIDTH=1500 FUZZ=7

  1. MAKEFILE

progressive_transparency: grey_wiping convert shadedrelief.grey_no.png -alpha copy -channel alpha -negate +channel $(ITEM).shadedrelief.trans.png

grey_wiping: resizing convert $(ITEM).shadedrelief.grey.png -fuzz $(FUZZ)% -transparent "#DDDDDD" shadedrelief.grey_no.png

resizing: shading convert shadedrelief.tif -resize $(WIDTH) $(ITEM).shadedrelief.grey.png

shading: crop gdaldem hillshade crop.tif shadedrelief.tif -z 5 -s 111120 -az 315 -alt 60

  1. ---- Crop

crop: unzip gdal_translate -projwin $(WEST) $(NORTH) $(EAST) $(SOUTH) ETOPO1_Ice_g_geotiff.tif crop.tif #ETOPO1_Ice_g_geotiff.tif # ulx uly lrx lry (geodegrees) // W N E S #todo: add name parameter

  1. ---- Download

unzip: download unzip -n ../data/ETOPO1/ETOPO1.zip '*.tif' #-n: no overwrite if exist; touch ETOPO1_Ice_g_geotiff.tif

download: clean curl -o ../data/ETOPO1/ETOPO1.zip 'http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO1/data/ice_surface/grid_registered/georeferenced_tiff/ETOPO1_Ice_g_geotiff.zip'

clean: # task commands to improve! echo "hello" > fakefile.ext rm `ls | grep -v '.makefile'| grep -v '.tif'` </syntaxhighlight>

Example
<syntaxhighlight lang="bash">

cd ~/wikimaps/ make -f shadedrelief.makefile WEST=-5.8 NORTH=51.5 EAST=10.0 SOUTH=41.0 ITEM=France </syntaxhighlight>

Extended content
To do:
1. resize the png to have suitable dimensions.
2. generate a transparent-to-black version
3. generate a white to black version
4. generate a shape-topojson version.

topography.makefile (0%)

Action: When run, this topography.makefile download the raster GIS DEM sources, process them (unzip, crop, slice, polygonize, merge), to output an elegant topographic stack topojson or svg file.

topography.makefile

<syntaxhighlight lang="make"> [...] </syntaxhighlight>

Example
<syntaxhighlight lang="bash">

cd ./home/.../wikimaps/ make -f topography.makefile WEST=-5.8 NORTH=51.5 EAST=10.0 SOUTH=41.0 ITEM=France </syntaxhighlight>

Extended content
To do:
1. ?

See also

 

The table above has links to various tutorials and resources which can help in the creation of Wikipedia maps from digital georeferenced data (GIS).

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