18 February 2011

Global 30 Arc-second Elevation Data : GTOPO30

GTOPO30 is a global raster Digital Elevation Model (DEM) with a horizontal grid spacing of 30 arc seconds (approx. 1-km); the most popular, publicly available and complete global DEM dataset. And allows users to FREELY preview or DOWNLOAD Data.

GTOPO30 was derived from several raster and vector sources of topographic information. For easier distribution, GTOPO30 has been divided into tiles which can be selected from the map shown above. Detailed information on the characteristics of GTOPO30 including the data distribution format, the data sources, production methods, accuracy, and hints for users, is found in the GTOPO30 README link, at the end of this article.

Below, the GTOPO30 “easy-to-use” Data Download page:

GTOPO30, completed in late 1996, was developed over a three year period through a collaborative effort led by staff at the U.S. Geological Survey's Center for Earth Resources Observation and Science (EROS). The following organizations participated by contributing funding or source data: the National Aeronautics and Space Administration (NASA), the United Nations Environment Programme/Global Resource Information Database (UNEP/GRID), the U.S. Agency for International Development (USAID), the Instituto Nacional de Estadistica Geografica e Informatica (INEGI) of Mexico, the Geographical Survey Institute (GSI) of Japan, Manaaki Whenua Landcare Research of New Zealand, and the Scientific Committee on Antarctic Research (SCAR).

You may also like:

FAIR USE NOTICE: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, sustainable development, environmental, community and worker health, democracy, public disclosure, corporate accountability, and social justice issues, etc. We have included the full text of the article rather than a simple link because we have found that links frequently go "bad" or change over time. We believe this constitutes a "fair use" of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without fee or payment of any kind to those who have expressed a prior interest in receiving the included information for research and educational purposes. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner.