Util for processing geojson coordinates, in most cases to project them
npm install geojson-project_geojsonProject(geojson, func, context)_
- geojson is Feature or FeatureCollection
- func is the project function, takes in one coordinate pair,
returns it transformed
- context _optional_ - transform function's this
returns transformed copy of GeoJSON
``js
var geojsonProject = require("geojson-project");
geojsonProject(
{
type: "FeatureCollection",
features: [
{
type: "Feature",
properties: { a: 1 },
geometry: {
type: "Point",
coordinates: [6, 6],
},
},
{
type: "Feature",
properties: { a: 2 },
geometry: {
type: "Point",
coordinates: [4, 4],
},
},
],
},
function (coord) {
return [coords[0] / 2, coords[1] / 2];
}
);
`
will result in
`js`
{
type: 'FeatureCollection',
features: [{
type: 'Feature',
properties: {a : 1},
geometry: {
type: 'Point',
coordinates: [3, 3]
}
}, {
type: 'Feature',
properties: {a : 2},
geometry: {
type: 'Point',
coordinates: [2, 2]
}
}]
}
`shell``
$ npm test
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