flutter_map_rastercoords #

A flutter_map plugin for plain image map projection to display large images using tiles generated with gdal2tiles.

Inspired from leaflet-rastercoords.

Features #

• Provides utilities to convert between pixel coordinates and LatLng.
• Helper method to set up flutter_map option such as getMaxBounds

Usage #

1. Add flutter_map_rastercoords to your pubspec.yaml:

   dependencies:
     flutter_map_rastercoords: ^0.0.1
   

2. Create RasterCoords instance:

     final rc = RasterCoords(width: 1280, height: 1280);
   

3. On your FlutterMap:

   Widget build(BuildContext context) {
     return FlutterMap(
          options: MapOptions(
          // for non-geographical maps
          crs: CrsSimple(),
          // initialize with map on center
          initialCenter: rc.pixelToLatLng(x: 1280 / 2, y: 1280 / 2), 
          // optimal zoom
          maxZoom: rc.zoom,
          minZoom: 1,
          initialZoom: 1,
            // set max bounds 
            cameraConstraint: CameraConstraint.containCenter(
              bounds: rc.getMaxBounds(),
            ),
          ),
       children: [
         TileLayer(
           urlTemplate: 'http://localhost:8000/map_tiles/{z}/{x}/{y}.png',
         ),
       ],
     );
   }