Feb 22, 2009
Create Dynamic Numbered Markers for Google Maps
When you’re plotting locations from a database or matching search results to markers on the map, you may want to add labels. For example, the closest locations on this WiFi hotspot are both listed and plotted, marking spots with numbers. Similarly, Google shows local search results with alpha labels, A-Z.
Previously, you had to download sets of markers. If you needed a marker you didn’t have, you needed to make a new one. Thanks to Google Charts, you can create dynamic labeled markers.
All it requires is passing the label in the URL. Pretty easy. You can also change the color of the marker and its border. Here’s the URL for the “A” marker:
http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=A|00CC99|000000
Even better, you can use the markers anywhere you find useful, including other mapping providers. An example of this using Mapstraction is in my book. If you’d like to see it in Google Maps proper, view the source of this sample map.
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