Seamless Shuttle Radar Topography Mission (SRTM) Digital Elevation Models (DEMs)
description: The SRTM tiles are DEM data divided in to one degree blocks for the surface of the earth. The data MDL hosts is divided into two resolutions, one at 3 arc seconds (90m) and one at 30 arc seconds (900m). 80% of the earths surface is covered for all of the area between 60 degrees N and 53 degrees S. SRTM data is in WGS84 datum and the elevation units are in metres. Digital Elevation Data for creating contours and other spatial analysis. World DEM data.
creator: NASA / USGS
source: SRTM30 Documentation SRTM Collection User Guide (revised October 2015)
publisher: Land Information Worldwide Mapping, LLC
date: 2000
format: 1 arc-second (~30 m resolution) The most recent version of the SRTM dataset offers a spatial resolution of 1 arc-second (approximately 30 m × 30 m). Its coverage is considered near-global, capturing roughly 80% of the Earth’s land surface. 3 arc-second (~90 m resolution) In this dataset, 3 arc-seconds corresponds to a pixel size of about 90 m × 90 m. Each tile measures 1201 × 1201 pixels, covering an area of roughly 36 km × 36 km (for example, a local tile may cover the core of the Golden Horseshoe region). The data are provided in .bil format, which can be readily displayed in ArcGIS Pro. 30 arc-second (~1 km resolution) A 30 arc-second grid corresponds to a pixel size of approximately 1 km × 1 km. These tiles are significantly larger than the 3 arc-second tiles in both spatial coverage and number of pixels. For instance, a “local” tile may be 4800 × 6000 pixels, covering all of Ontario and Quebec, parts of Manitoba and Nunavut, and extending from the northeastern United States up to Greenland. The files are provided in several formats including .jpg and .dem and can be directly used in ArcGIS Pro.
coverage: Global, excluding north and south polar areas.