Atlas-Magic ✨

This tool will:
-> download a shp file from CDN
-> apply an optional filter
-> converts to topojson
-> simplify geometries while preserving topology

Run it

npx atlas-magic us-rivers > newtopojson.json

Watch the magic happen...

Command Line Reference

#atlas-magic <command> [options…] <>

where <command> is:
us-counties, us-cities, us-rivers, us-states, combine-topo

[options...]

key	default	example
--listfile		myFIPScodes.csv (used for filtering)
--filterkey	FIPS
--max	100000	for population (when applied)
--simplify	0.006
--quantize	1e6

Examples

US Cities with population over 250k

$ atlas-magic us-cities --max 250000 > cities_over_250k.json

US Counties filtered by a newline delimited list

$ atlas-magic us-counties --listfile fips_codes.csv > my-us-counties.json

US Rivers

$ atlas-magic us-rivers > us-rivers.json

US States

$ atlas-magic us-states > us-states.json

Combine topologies (not merge)

$ atlas-magic us-states > us-states.json
$ atlas-magic us-counties --listfile fips_codes.csv > us-counties.json
$ atlas-magic combine-topo us-states.json us-counties.json > us-states-with-counties.json