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morganherlocker/unixy_gis.md

Created April 14, 2014 15:32
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hypothetical gis cli
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unixy_gis.md

unixy gis

Create a 5 mile buffer around all households, merge the polygons, and output a geojson file representing populated areas.

cat households.geojson |
turf_buffer --distance 5 --units "miles" |
turf_merge >
populated_areas.geojson

Crunch some stats on counties, given block census data.

cat counties.geojson |
turf_sum --points block_points.geojson --z "population" --out_field "population_sum" |
turf_avg --points block_points.geojson --z "median_income" --out_field "median_income_avg" |
geocolor --classification "quantiles" --z "median_income_avg" --breaks 5 --colors red,yellow,green |
geojsonio

Create a contour map given a set of elevation points, then pipe the results into geojson.io

cat elevation_pts.geojson |
turf-isolines --z "elevation" --resolution 40 --breaks 0,500,2000,5000,10000 |
geojsonio
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