Mapbox-gl-js中的线或面对象点

Question

I work with Mapbox-GL. I'm blocking on something that needs to be obvious.

How can I convert geometry (lng / lat) to point (x, y)?

There is a "Javascript library" bookseller for this?

Then, if it's a point, line, polygon or multipolygon ...

Thanks!

Answer 1

Use the project method of the map object.

The screenshot is taken from the mapbox-gl-js documentation on project .

Reference: https://stackoverflow.com/a/23085119/4481169

Answer 2

map#project and "geojson-project" github.com/w8r/geojson-project

Code sample:

var shape = geojsonProject(object, function(coord) {
    var pt = map.project(coord.slice())
    return [pt.x, pt.y];
},