get GeojsonCoordinates of protobuff vectors.

[Zahma]

It would be a nice feature to have a method under protobuff returned layer that will return the geojson coordinates of layers. Similar to toGeojson in L.Layer under leaflet.

[IvanSanchez]

Duplicate of #176.

Also, you already got the toGeoJSON() method of https://github.com/mapbox/vector-tile-js for doing that.

[Zahma]

Indeed there is a method toGeoJSON(x, y, z) in leaflet.vectorGrid but it takes x, y, and z. what are those ? z is the zoom level , but what does x, and y stand for ? knowing that the method calles loadGeometry()

[IvanSanchez]

Indeed there is a method toGeoJSON(x, y, z) in leaflet.vectorGrid

No, there isn't..

[Zahma]

https://unpkg.com/leaflet.vectorgrid@1.3.0/dist/Leaflet.VectorGrid.js

VectorTileFeature$2.prototype.toGeoJSON = function(x, y, z) {
    var size = this.extent * Math.pow(2, z),
        x0 = this.extent * x,
        y0 = this.extent * y,
        coords = this.loadGeometry(),
        type = VectorTileFeature$2.types[this.type],
        i, j;

    function project(line) {
        for (var j = 0; j < line.length; j++) {
            var p = line[j], y2 = 180 - (p.y + y0) * 360 / size;
            line[j] = [
                (p.x + x0) * 360 / size - 180,
                360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90
            ];
        }
    }

    switch (this.type) {
    case 1:
        var points = [];
        for (i = 0; i < coords.length; i++) {
            points[i] = coords[i][0];
        }
        coords = points;
        project(coords);
        break;

    case 2:
        for (i = 0; i < coords.length; i++) {
            project(coords[i]);
        }
        break;

    case 3:
        coords = classifyRings(coords);
        for (i = 0; i < coords.length; i++) {
            for (j = 0; j < coords[i].length; j++) {
                project(coords[i][j]);
            }
        }
        break;
    }

    if (coords.length === 1) {
        coords = coords[0];
    } else {
        type = 'Multi' + type;
    }

    var result = {
        type: "Feature",
        geometry: {
            type: type,
            coordinates: coords
        },
        properties: this.properties
    };

    if ('id' in this) {
        result.id = this.id;
    }

    return result;
};

[IvanSanchez]

That's from a bundled dependency, not from VectorGrid itself.

[Zahma]

yes its from

Also, you already got the toGeoJSON() method of https://github.com/mapbox/vector-tile-js for doing that.

but there are parameters x,y, and z. I'm what does x, and y stand for ? I need to transform the pixel coordinates to lat long .

[IvanSanchez]

I don't know pal, maybe check the freakin' documentation from vector-tile-js yourself??!!

[StefanBrand]

@IvanSanchez Could you elaborate on how to employ vector-tile-js's toGeoJSON() in a VectorGrid?

From reading code and documentation of both vector-tile-js and VectorGrid I still don't get how I can retrieve a GeoJSON representation of a vector tile that is loaded in VectorGrid. When I type

vectorgrid._vectorTiles["17590:11444:15"]._features[2984819].feature.toGeoJSON(17590,11444,15)

into console, I only get TypeError: t is undefined.

I want to use leaflet-pip on a VectorGrid because I want to query overlapping polygons.

[arma7x]

Indeed there is a method toGeoJSON(x, y, z) in leaflet.vectorGrid but it takes x, y, and z. what are those ? z is the zoom level , but what does x, and y stand for ? knowing that the method calles loadGeometry() http://tile.openstreetmap.org/{z}/{x}/{y}.png