leaflet circle drawing / editing issue

Question

I am working on leaflet for the very first time and facing the issue with drawing circles and editing (changing location of circle).

The problems I am facing

Answer 1

What you're seeing is distortion in distance inherent in the mercator projection (and the Google Mercator projection based off it that is inherent to most online maps). Because your map starts at zoom 1, dragging the circle marker north/south will cause a lot of distortion.

So, rather than georeference your image to a global bounding box, try georeferencing it to something much smaller. In your case, your are adding your image overlay relative to the maxZoom, so by increasing maxZoom, your image will be overlayed over a smaller area of the globe, and you will see less (or no) distortions across latitudes.

I changed the maxZoom from 4 to 14, and the result looked like it worked well: fiddle here: var w = 553, h = 329, url = 'https://kathleenmillar.files.wordpress.com/2012/10/picture2.png';

    var map = L.map('map', {
        minZoom : 10,
        maxZoom : 14,
        center : [ w / 2, h / 2 ],
        zoom : 11,
        crs : L.CRS.Simple

    });

    // calculate the edges of the image, in coordinate space
    var southWest = map.unproject([ 0, h ], map.getMaxZoom() - 3);
    var northEast = map.unproject([ w, 0 ], map.getMaxZoom() - 3);
    var bounds = new L.LatLngBounds(southWest, northEast);