open-geotiling

open-geotiling-typescript

Open GeoTiling typescript implementation.

The original library can be found here : https://github.com/bocops/open-geotiling

How to get it ?

npm install open-geotiling --save

Usage

Get approximative direction between OLC

const tile1 = OpenGeoTile.buildFromTileAddress("9F53");
const tile2 = OpenGeoTile.buildFromTileAddress("8FX3");
tile1.getDirection(tile2); // ~= Math.PI / 2

Test adjacency

const originalBlock = OpenGeoTile.buildFromTileAddress("8CRW2X");
[
  OpenGeoTile.buildFromTileAddress("8CRW3W"),
  OpenGeoTile.buildFromTileAddress("8CRW3X")
].forEach(other => {
  if (originalBlock.isNeighbor(other{
    // do something.
  }
});

Membership (contains)

const bigBlock = OpenGeoTile.buildFromTileAddress("8CFF");
const smallBlock = OpenGeoTile.buildFromTileAddress("8CFFXX");
const tinyBlock = OpenGeoTile.buildFromTileAddress("8CFFXXHH");

bigBlock.contains(smallBlock); // true
bigBlock.contains(tinyBlock); // true

Get all GeoTiles for a polygon made of coordinates

const coords = [];
coords.push(new Coordinate(47.475062, -0.552563));
coords.push(new Coordinate(47.469938, -0.552563));
coords.push(new Coordinate(47.469938, -0.547438));
coords.push(new Coordinate(47.475062, -0.547438));

const testTileArea = new TileAreaPolygonalBuilder()
      .setPrecision(TileSize.PINPOINT) // find all tiles for this size
      .setMaximumTileSize(TileSize.NEIGHBORHOOD) // merge tiles to this maximum size (default is setPrecision value)
      .setCoordinatesList(coords)
      .build();

Licence

The project is licensed under the Apache License 2.0.