get-epsg-code/README.md

Gets EPSG Code for Various Inputs (incl. OGC WKT, ESRI WKT, GML, Mapfile, PROJ String, Proj4js String, XML)

# get-epsg-code: *beta*
Gets the EPSG Code for Nearly All Coordinate Reference System Formats (including OGC WKT, WKT 2, ESRI WKT, GeoServer Config, Mapfile, Mapnik Config, PostGIS Statement, PROJJSON, PROJ String, and Proj4JS String)
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# usage
```javascript
const getEPSGCode = require("get-epsg-code");

const proj4string = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs";

const epsgCode = getEPSGCode(proj4string);
// 3857
```

# purpose
Get the EPSG code for input without the need for a remote server

# algorithm
Take a CSV of Coordinate Reference System formats, hash the columns and stores the result in a binary file.

# limitations
This package goes only one way. It only gets EPSG codes for a given input. It cannot provide coordinate information for an EPSG code.

# advanced usage
For advanced usage, see [ADVANCED_USAGE.md](https://github.com/DanielJDufour/get-epsg-code/blob/master/ADVANCED_USAGE.md)

# contact
Post an issue at https://github.com/danieljdufour/get-epsg-code/issues or email the package author at daniel.j.dufour@gmail.com