I am using matplotlib Basemaps to create some contour lines based on some lat/longs. I am basically following Cesium Sandcastle to wrap a transparent png that I create. I cannot get the png that I create to correctly line up with the globe.
When I test with the picture that the Sandcastle provides, I CAN get the image to wrap properly, so I assume that I am using an incorrect map projection, or an incorrect image size, or something similar. Has anyone done anything similar, or does anyone know what map projection I need to use to get my png to line up properly with the Cesium globe?