Those last three numbers are the X (longitude), Y (latitude), and Z (zoom) "coordinates" of the tile. The map tiles are stored on the Google Crisis Response server, and each tile's URL looks something like this: In the first example, we'll create a map with a very specific custom layer: aerial photos of the damage done by a tornado in Moore, Oklahoma in May 2013.
Of course, you'll need to have a little bit of experience with HTML and JavaScript.Īlmost everything you need to do will involve the gv_options.map_type_control variable. No problem: with a text editor, you can alter the guts of your map to include any map server that uses Google-style tiles in the Mercator projection. (And the list is always growing if you find out about a publicly-accessible map layer that might be a good addition, send a note to the contact address at the bottom of this page.)īut sometimes you might have a specific need for a layer that doesn't warrant inclusion in the universal list. When you create a Google Map with GPS Visualizer, the "map type" menu in the upper-right corner of the map contains many options that you don't get on. No ads? No problem! You can support GPS Visualizer by making a donation with PayPal instead.Īdding custom background layers to Google Maps