From the US Geological Survey: The Elevation Query Web Service returns the elevation in feet or meters for a specific latitude/longitude point from the USGS Seamless Elevation data sets hosted at USGS/EROS. The elevation values returned default to the best-available (highest resolution) data source available at the specified point. Alternately, this service may return the value from a specified data source, or from all data sources. If unable to find data at the requested point, this services returns an extremely large, negative value.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.