Reproject GeoJSON. Works Offline.
npm install reproject-geojson:warning: __warning__. _Use with caution. In most cases, you don't want to do this. Technically, you can't reproject a GeoJSON,
because the GeoJSON standard only accepts 1 projection (Latitude/Longitude on a WGS 1984 Datum)._
bash
npm install reproject-geojson
`usage
js
import reprojectGeoJSON from "reproject-geojson";const geojson = {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1]
},
"properties": {
"name": "Dinagat Islands"
}
};
// reproject using EPSG Code
reprojectGeoJSON(geojson, { to: 3857 });
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [13981728.04363516, 1130195.3976388907]
},
"properties": {
"name": "Dinagat Islands"
}
};
// reproject using Proj4 String
reprojectGeoJSON(geojson, { to: "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 ..." });
// reproject using Well-Known Text
reprojectGeoJSON(geojson, { to: 'PROJCS"WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984", ...' });
// reproject using ESRI Well-Known Text
reprojectGeoJSON(geojson, { to: 'PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984", ...' });
`advanced usage
$3
If you want the convenience of reproject-geojson without the overhead of the
[proj4-fully-loaded dependency,
you can use the pluggable version of reprojectGeoJSON:
js
import reprojectGeoJSONPlugable from "reproject-geojson/pluggable.js";const proj4 = require("proj4");
const reproject = proj4("EPSG:3857", "EPSG:4326").forward;
reprojectGeoJSONPlugable(geojson, { reproject });
`
$3
If you want to densify your line segments or polygon edges before reprojection,
pass in "densify" and this'll be passed to reproject-line.
js
// add up to 10 points to each line segment as needed
reprojectGeoJSON(geojson, { to: 32610, densify: 10 });reprojectGeoJSONPlugable(geojson, { reproject, densify: 10 });
``