SRTM30 is a digital elevation data set that spans the globe from 60° north latitude to 56° south latitude, approximately from the southern tip of Greenland to below the southern tip of South America. It has a horizontal grid spacing of 30 arc-seconds (approximately 1 kilometer). For a global map of SRTM30 in Mercator Projection, click here.

SRTM30 was generated by NASA and the National Imagery and Mapping Agency ( NIMA ), produced as part of the 11-day Shuttle Radar Topography Mission ( SRTM ) aboard the Space Shuttle Endeavour in February of 2000. While SRTM30 has the same resolution as GTOPO30, it can be considered a more accurate global digital data set compared to GTOPO30 because of its seamless and uniform representation, due to the fact that it was created over a short period of time from a single source rather than from the numerous sources spanning many decades that went into creating the GTOPO30 data set. However, it must be noted that the SRTM30 does not cover the poles north and south of approximately 60° latitude. Therefore, data for Antarctica, for example, must be obtained from the GTOPO30 data set. For more information on the Shuttle Radar Topography Mission (SRTM), please click here.