GIS Command Line Interfaces

Install all mentioned packages:

npm install -g geojsonio-cli wellknown csv2geojson geojsonify togeojson simplify-geojson reproject @mapbox/geojsonhint @mapbox/geojson-merge

CLIs

• simplify-geojson: Apply Ramer–Douglas–Peucker line simplification to GeoJSON features or feature collections in JS or on the CLI.
• @mapbox/geojson-merge: Merge multiple GeoJSON files into one FeatureCollection.
• geojsonio-cli: Shoot files from your shell to geojson.io for lightning-fast visualization and editing.
• @mapbox/geojsonhint: A lint tool for the GeoJSON standard. geojsonhint is written to the standard, with no missing or additional opinions about structure.
• wellknown: Parse & stringify Well-Known Text into GeoJSON.
• csv2geojson: Converts CSV and TSV files into GeoJSON data suitable for maps.
• geojsonify: Convert lines of geojson features into a geojson collection. Useful for using grep to manipulate geojson from ogr2ogr
• togeojson: convert KML and GPX to GeoJSON, without the fuss
• reproject: Transforms GeoJSON from one projection / CRS (Coordinate Reference Systems) to another.

Examples

• Simplify geojson

curl https://raw.github.com/maxogden/simplify-geojson/master/test-data/oakland-route.csv | \
  csv2geojson --lat "LATITUDE N/S" --lon "LONGITUDE E/W" --line true | \
  simplify-geojson -t 0.001 | \
  geojsonio

• Merging multiple files in a folder

geojson-merge file1.geojson file2.geojson > merged.geojson
geojson-merge folder/*.geojson > combined.geojson

• Convert WKT file to a GeoJSON file.

echo "MultiPoint(0 0, 1 1, 3 3)" | wellknown > multipoint.geojson

• pipe wkt through wellknown into geojsonio to get magic:

echo "MultiPoint(0 0, 1 1, 3 3)" | wellknown | geojsonio

• pipe grep'ed geojson through geojsonify:

grep -h something *json | geojsonify | geojsonio

• convert kml or gpx to geojson and push it to geojson.io:

togeojson foo.kml | geojsonio

• copy the generated url instead of opening it in a browser (on OSX)

geojsonio foo.geojson --print | pbcopy