# Atlas-Magic :sparkles:

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

<a name="atlas-magic" href="#atlas-magic">#</a>atlas-magic &lt;command&gt; [options…] [`<>`](https://github.com/bradoyler/atlas-magic/blob/master/bin/atlas-magic.js "Source")

where __&lt;command&gt;__ is: 
`us-counties, us-cities, us-rivers, us-states, combine-topo`

__[options...]__

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

### Examples

##### US Cities with population over 250k
```sh
$ atlas-magic us-cities --max 250000 > cities_over_250k.json
```

##### US Counties filtered by a newline delimited list
```sh
$ atlas-magic us-counties --listfile fips_codes.csv > my-us-counties.json
```

##### US Rivers
```sh
$ atlas-magic us-rivers > us-rivers.json
```

##### US States
```sh
$ atlas-magic us-states > us-states.json
```

##### Combine topologies (not merge)
```sh
$ 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
```

a magic CLI for making GIS data files (topojson, geojson). 

atlas-magic

a magic CLI for making GIS data files (topojson, geojson)

bradoyler

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

atlas-magic

Atlas-Magic :sparkles:

Run it

Command Line Reference

Examples

US Cities with population over 250k

US Counties filtered by a newline delimited list

US Rivers

US States

Combine topologies (not merge)

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