If you have a map image of your area of interest, you could plot and scale the map coordinates using theimagesc function after reading the image in with theimread function. Furthermore, if you have known points of reference on the map and know the scale, you can simply plot yourquiver plot directly over the map image!
Here is an extremely basic outline of how your code could look. The coordinates are up to you to fill in, of course:
% Import map image
mapImage = imread('map.jpg');
% Overlay the quiver plot
The primary trick here is to ensure your scales of the map and your quiver plot are aligned. I am also assuming that you will be plotting over a relatively small area such that map projection/transformations are not an issue. I would recommend brushing up on projections, just in case: