Add #toGeoJSON to various layer types (#712)

This commit is contained in:
John Firebaugh 2013-02-26 14:54:58 -08:00
parent 6c7316dfec
commit 55edd44678
3 changed files with 183 additions and 0 deletions

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@ -56,6 +56,7 @@
<!-- /layer -->
<script type="text/javascript" src="suites/layer/FeatureGroupSpec.js"></script>
<script type="text/javascript" src="suites/layer/GeoJSONSpec.js"></script>
<script type="text/javascript" src="suites/layer/LayerGroupSpec.js"></script>
<script type="text/javascript" src="suites/layer/TileLayerSpec.js"></script>

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@ -0,0 +1,86 @@
describe("L.Marker#toGeoJSON", function () {
it("returns a Point object", function () {
var marker = new L.Marker([10, 20]);
expect(marker.toGeoJSON()).toEqual({
type: 'Point',
coordinates: [20, 10]
});
});
});
describe("L.Polyline#toGeoJSON", function () {
it("returns a LineString object", function () {
var polyline = new L.Polyline([[10, 20], [2, 5]]);
expect(polyline.toGeoJSON()).toEqual({
type: 'LineString',
coordinates: [[20, 10], [5, 2]]
});
});
});
describe("L.MultiPolyline#toGeoJSON", function () {
it("returns a MultiLineString object", function () {
var multiPolyline = new L.MultiPolyline([[[10, 20], [2, 5]], [[1, 2], [3, 4]]]);
expect(multiPolyline.toGeoJSON()).toEqual({
type: 'MultiLineString',
coordinates: [
[[20, 10], [5, 2]],
[[2, 1], [4, 3]]
]
});
});
});
describe("L.Polygon#toGeoJSON", function () {
it("returns a Polygon object (no holes)", function () {
var polygon = new L.Polygon([[1, 2], [3, 4], [5, 6]]);
expect(polygon.toGeoJSON()).toEqual({
type: 'Polygon',
coordinates: [[[2, 1], [4, 3], [6, 5], [2, 1]]]
});
});
it("returns a Polygon object (with holes)", function () {
var polygon = new L.Polygon([[[1, 2], [3, 4], [5, 6]], [[7, 8], [9, 10], [11, 12]]]);
expect(polygon.toGeoJSON()).toEqual({
type: 'Polygon',
coordinates: [
[[2, 1], [4, 3], [6, 5], [2, 1]],
[[8, 7], [10, 9], [12, 11], [8, 7]]
]
});
});
});
describe("L.MultiPolygon#toGeoJSON", function () {
it("returns a MultiPolygon object", function () {
var multiPolygon = new L.MultiPolygon([[[1, 2], [3, 4], [5, 6]]]);
expect(multiPolygon.toGeoJSON()).toEqual({
type: 'MultiPolygon',
coordinates: [
[[[2, 1], [4, 3], [6, 5], [2, 1]]]
]
});
});
});
describe("L.LayerGroup#toGeoJSON", function () {
it("returns a GeometryCollection object", function () {
var marker = new L.Marker([10, 20]),
polyline = new L.Polyline([[10, 20], [2, 5]]),
layerGroup = new L.LayerGroup([marker, polyline]);
expect(layerGroup.toGeoJSON()).toEqual({
type: 'GeometryCollection',
geometries: [marker.toGeoJSON(), polyline.toGeoJSON()]
});
});
it("omits layers which do not implement toGeoJSON", function () {
var tileLayer = new L.TileLayer(),
layerGroup = new L.LayerGroup([tileLayer]);
expect(layerGroup.toGeoJSON()).toEqual({
type: 'GeometryCollection',
geometries: []
});
});
});

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@ -147,6 +147,102 @@ L.extend(L.GeoJSON, {
}
});
L.extend(L.GeoJSON, {
latLngToCoords: function (latLng) {
return [latLng.lng, latLng.lat];
},
latLngsToCoords: function (latLngs) {
var coords = [],
i, len;
for (i = 0, len = latLngs.length; i < len; i++) {
coords.push(L.GeoJSON.latLngToCoords(latLngs[i]));
}
return coords;
}
});
L.Marker.include({
toGeoJSON: function () {
return {
type: 'Point',
coordinates: L.GeoJSON.latLngToCoords(this.getLatLng())
};
}
});
L.Polyline.include({
toGeoJSON: function () {
return {
type: 'LineString',
coordinates: L.GeoJSON.latLngsToCoords(this.getLatLngs())
};
}
});
L.Polygon.include({
toGeoJSON: function () {
var coords = [L.GeoJSON.latLngsToCoords(this.getLatLngs())],
i, len, hole;
coords[0].push(coords[0][0]);
if (this._holes) {
for (i = 0, len = this._holes.length; i < len; i++) {
hole = L.GeoJSON.latLngsToCoords(this._holes[i]);
hole.push(hole[0]);
coords.push(hole);
}
}
return {
type: 'Polygon',
coordinates: coords
};
}
});
(function () {
function includeMulti(Klass, type) {
Klass.include({
toGeoJSON: function () {
var coords = [];
this.eachLayer(function (layer) {
coords.push(layer.toGeoJSON().coordinates);
});
return {
type: type,
coordinates: coords
};
}
});
}
includeMulti(L.MultiPolyline, 'MultiLineString');
includeMulti(L.MultiPolygon, 'MultiPolygon');
}());
L.LayerGroup.include({
toGeoJSON: function () {
var geoms = [];
this.eachLayer(function (layer) {
if (layer.toGeoJSON) {
geoms.push(layer.toGeoJSON());
}
});
return {
type: 'GeometryCollection',
geometries: geoms
};
}
});
L.geoJson = function (geojson, options) {
return new L.GeoJSON(geojson, options);
};