Grid2geojson NPM

grid2geojson

Node.js package for convert 2D array grid data to GeoJSON format

See source code on Github

Installing

In Node.js. Install by npm command

npm install grid2geojson

Example

Import package

var grid2geojson = require('grid2geojson');

Initial parameter in this format

lats = [lat1, lat2, lat3, lat4]
lons = [lon1, lon2, lon3, lon4]
data = [[value at lat1lon1, value at lat1lon2, value at lat1lon3, value at lat1lon4],
        [value at lat2lon1, value at lat2lon2, value at lat2lon3, value at lat2lon4],
        [value at lat3lon1, value at lat3lon2, value at lat3lon3, value at lat3lon4],
        [value at lat4lon1, value at lat4lon2, value at lat4lon3, value at lat4lon4]]

And then use function

padding = true
var geojson = grid2geojson.toGeoJSON(lats, lons, data, padding);

It's will return like this.

geojson = [feature at lat1lon1, feature at lat1lon2, feature at lat1,lon3, ...]

feature at lat1lon1 = {
    "type": "Feature",
    "properties": { "value": value at lat1lon1 },
    "geometry": {
        "type": "Polygon",
        "coordinates": [
            [
                [lon1, lat1],
                [lon2, lat1],
                [lon2, lat2],
                [lon1, lat2]
            ]
        ]
    }
}

If data is NxN grid and padding is false. output is (N-1)x(N-1) grid If data is NxN grid and padding is true. output is NxN grid