Retrieving latitude and longitude coordinates to determine percentage-based or pixel-based x and y positions

I'm currently working on extracting percentage or pixel coordinates from a latlng in leaflet maps.

Here is the code snippet that sets up the map and tile layers (adapted from an app named 'maptiler')

    var mapMinZoom = 0;
    var mapMaxZoom = 3;
    var map = L.map('main-map', {
        maxZoom: mapMaxZoom,
        minZoom: mapMinZoom,
        crs: L.CRS.Simple
    }).setView([0, 0], mapMaxZoom);
    var mapBounds = new L.LatLngBounds(
        map.unproject([0, 1792], mapMaxZoom),
        map.unproject([2048, 0], mapMaxZoom));

    map.fitBounds(mapBounds);
    L.tileLayer('/_Content/leafletmap/{z}/{x}/{y}.png', {
        minZoom: mapMinZoom, 
        maxZoom: mapMaxZoom,
        bounds: mapBounds,
        noWrap: true,
        tms: false
    }).addTo(map);

The primary need here is for offline functionality within a cordova application which explains our avoidance of the Google Maps API.

Answer №1

If you're in search of Leaflet Map Transformation Techniques:

  • latLngToLayerPoint(latlng) to acquire the layer point with respect to the whole map.
  • latLngToContainerPoint(latlng) to retrieve the point in relation to the map container ('main-map' for your scenario).

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