Marker display position is misaligned and offset does not work.

[doraneko94]

I use two layers, MarkerLayer of flutter_map and DragMarkers of flutter_map_dragmarker, as shown in the code below.

FlutterMap(
  ...
  children: [
    ...
    MarkerLayer(markers: markers),
    DragMarkers(markers: dragMarkers,),
    ...
  ],
  ...
)

I have given these arguments, markers and dragMarkers, points with the same latitude and longitude, but in the actual display, the two points are displayed misaligned as shown in the figure.
(The blue icon is element of markers and the purple icon is element of dragMarkers.)

I thought about adjusting the offset of dragMarker to correct the misalignment, but this parameter does not seem to work (i.e., changing the offset value from (0, 0) to (10, 10), for example, does not change the position of the icon).

Is this a bug in the library? Or is there any way to deal with this?
Now I'm using version ^6.0.0.

[ibrierley]

Have you tried using Alignment alignment ? Maybe produce a test example page others can use investigate.

[mdavo6]

I had the same problem earlier today. Was able to align them perfectly by adjusting the size values to suit.

DragMarker(
                                    point: LatLng(draggableSite!.latitude,
                                        draggableSite!.longitude),
                                    builder: (_, __, ___) {
                                      return const Icon(Icons.edit_location,
                                          color: Colors.lightGreenAccent,
                                          size: 40);
                                    },
                                    alignment: Alignment.center,
                                    size: const Size(30, 30), // <-- Update these to suit
                                    onDragEnd: (dragEndDetails, LatLng point) {
                                      newMarkerPosition = point;
                                    })

Hope this helps 👍