cule / node-gdal

Node.js bindings for GDAL (Geospatial Data Abstraction Library)

node-gdal

Read and write raster and vector geospatial datasets straight from Node.js with this native GDAL binding. GDAL 1.11.1 (GEOS 3.4.2, Proj.4 4.8.0) comes bundled, so node-gdal will work straight out of the box.

$ npm install gdal --save

To link against shared libgdal, install using:

# requires libgdal-dev (debian: sudo apt-get install libgdal-dev)
$ npm install gdal --build-from-source --shared_gdal

Links

• Documentation
• Examples

Sample Usage

Raster

var gdal = require("gdal");
var dataset = gdal.open("sample.tif");

console.log("number of bands: " + dataset.bands.count());
console.log("width: " + dataset.rasterSize.x);
console.log("height: " + dataset.rasterSize.y);
console.log("geotransform: " + dataset.geoTransform);
console.log("srs: " + (ds.srs ? ds.srs.toWKT() : 'null'));

Vector

var gdal = require("gdal");
var dataset = gdal.open("sample.shp");
var layer = dataset.layers.get(0);

console.log("number of features: " + layer.features.count());
console.log("fields: " + layer.fields.getNames());
console.log("extent: " + JSON.stringify(layer.extent));
console.log("srs: " + (layer.srs ? layer.srs.toWKT() : 'null'));

Notes

• This binding is currently not async, so it will block node's event loop. This will be changing in the future (#18). In the meantime, be very careful (or avoid) using it in server code.

Contributors

This binding is a collaboration between Natural Atlas and Mapbox. Its contributors are Brandon Reavis, Brian Reavis, Dane Springmeyer, Zac McCormick, and others.

Before submitting pull requests, please update the tests and make sure they all pass.

$ make test # test against bundled gdal
$ make test-shared # test against shared gdal

License

Copyright © 2014 Brandon Reavis & Contributors

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.