gridmaker

Grid maker

NB: To setup a coding environment, follow the instructions here and there.

To create a 10m resolution grid over 1km² starting at point (0,0):

Grid grid = new Grid()
		.setResolution(10)
		.setGeometryToCover(new Envelope(0, 1000, 0, 1000));

Collection<Feature> cells = grid.getCells();

This other example creates a 5km resolution grid covering Luxembourg (code LU) and a 1km margin, based on the European ETRS89-LAEA coordinate reference system (EPSG:3035). The cells are saved as a *.shp file:

//get country geometry
Geometry cntGeom = CountriesUtil.getEuropeanCountry("LU", true).getDefaultGeometry();

//build cells
Grid grid = new Grid()
		.setResolution(5000)
		.setEPSGCode("3035")
		.setGeometryToCover(cntGeom)
		.setToleranceDistance(1000);

//save cells as GeoPackage and SHP file
GeoData.save(grid.getCells(), "path_to_my/file.gpkg", CRS.decode("EPSG:3035"));
GeoData.save(grid.getCells(), "path_to_my/file.shp", CRS.decode("EPSG:3035"));

Input geometries can be loaded from GeoPackage, Shapefile or GeoJSON files or simply specified as rectangular extent. The grid cell geometries can be squared surfaces or points located at the center of these cells. Each grid cell is identified with a standard code such as CRS3035RES200mN1453400E1452800. The output grid cells can be saved as GeoPackage, Shapefile or GeoJSON files.

Documentation

See the Javadoc API.

Use it as program

See GridMaker.