This example shows how to use the Mercator projection and the graticule generator.
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September 26, 2015 03:03
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Mercator Projection
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| # Download and Transform the 1:50m Country Shapefiles from Natural Earth | |
| # http://www.naturalearthdata.com/downloads/110m-physical-vectors/ | |
| URL = http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/physical/ne_110m_land.zip | |
| # Download the zip file from the Natural Earth server | |
| ne_110m_land.zip: | |
| curl -LO $(URL) | |
| # Unzip the shapefiles | |
| ne_110m_land.shp: ne_110m_land.zip | |
| unzip ne_110m_land.zip | |
| touch ne_110m_land.shp | |
| # Convert the shapefiles to GeoJSON | |
| land.geojson: ne_110m_land.shp | |
| ogr2ogr -f GeoJSON land.geojson ne_110m_land.shp | |
| # Convert the GeoJSON file to TopoJSON | |
| land.topojson: countries.json | |
| topojson -p -o land.topojson land.geojson | |
| # Remove source and temporary files | |
| clean: | |
| rm ne_110m_land* |
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