Looking for mapping APIs to support your web application development efforts? Programmable web has a listing of nearly 100 mapping APIs and over 2000 mapping mashups. All the usual suspects including ESRI, OpenLayers, Google Maps, Bing, and CloudMade are on the list, but there are a lot of less well known entries. Some of the APIs that caught my eye:
- USGS Elevation Query Service
- BigTribe (Location based advertising)
- EarthTools
- HeatMapAPI (I discussed this one in greater detail here)
- HopStop (Mass transit and walking directions)
- Pushpin and Pushpin Location Data
Sold recently to Apple - TownMe Geo (Business listings, POI, reverse geocoding)
- YourStreet (Geocoding news article service)