Difference between revisions of "Terrain data"

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(Created page with '====== Terrain data ====== Below listed, are some sources for terrain data that can be used with the Pathloss program. Pathloss 4 can only use elevation and imagery data. ====...')
 
 
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====== Terrain data ======
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This page lists some common sources for terrain data that can be used with the Pathloss program. Pathloss 4 can only use elevation and imagery data.
  
Below listed, are some sources for terrain data that can be used with the Pathloss program. Pathloss 4 can only use elevation and imagery data.
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== NED vs SRTM in North America ==
  
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In North America there is NED and SRTM. What is the difference? The short answer is the SRTM data tends to include land cover in its data (elevations are the tops of the tree canopy or built up areas), where the NED data tends to be bare earth.
  
===== A word about elevation data =====
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== Public Terrain data (Free of charge) ==
  
In the USA there is NED and SRTM. What is the difference? The short answer is the SRTM data tends to include land cover in its data (elevations are the tops of the tree canopy or built up areas), where the NED data tends to be bare earth. The following link discusses the differences and the accuracy of both data sets http://eros.usgs.gov/conferences/SRTM/presentations/Slides06_Gesch.pdf
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[[FetchSRTM]] - Download tool for finding and downloading SRTM, NED and NLCD terrain data.
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====== Terrain data (Free of charge) ======
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[[terrain_data:Geobase]] - Geobase elevation data (CDED), Vector data for roads etc. and satellite imagery for all of Canada.
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==== USGS NED Data ====
  
[[terrain_data:USGS SDDS]] - USGS Seamless Data Distribution System for NED, SRTM, Clutter, Imagery and Vector data
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[[NLCD]] - USGS National Land Cover Data in BIL format. (USA Only)
  
[[terrain_data:NASA]] - NASA ftp for downloading SRTM elevation data
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[[NED data in GridFloat format]] - NED data in GridFloat format
  
[[terrain_data:USGS GLCC]] - Global Land Cover Characteristics Data Base Version 2.0
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==== SRTM Data (Worldwide 1" & 3" resolution) ====
  
====== Terrain data (Commercial) ======
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[[SRTM]] - USGS site for downloading SRTM elevation data.
  
When ever possible use the Planet format if it is available. Setup instructions for the Planet format can be downloaded at http://www.pathloss.com/downloads/docs/planet_utm.pdf
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[[SRTM30]] - USGS site for downloading SRTM30 which is an upgraded version of GTOPO30 (30" data for the world)
  
http://geoimage.fr/ - 1m to 100m resolution maps available worldwide.
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==== Canadian Data ====
  
http://www.infoterra.fr/Infoterra/ - 1m to 100m resolution maps available worldwide.
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[[Geobase]] - Geobase elevation data (CDED), Vector data for roads etc. and satellite imagery for all of Canada.
  
http://www.vexcel.com/
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[[NED data in GridFloat format]] - Very convenient FTP access to NED data in GridFloat format. The 1" files cover North America (Canada, USA and Mexico)
  
http://i3.com/
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[[Toporama]] - 1:50,000 scale UTM projected topographic maps for Canada in GeoTiff format.  
  
http://igage.com/ - Igage produces imagery datasets that cover the USA.
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==== World Databases ====
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[http://www.viewfinderpanoramas.org/dem3.html Viewfinder Panoramas] - Excellent resource to download free 3 second data for the world. This data is compiled from SRTM data with voids and artifacts filled in from other sources. See the [[SRTM]] section above for instructions on configuring for use in Pathloss.
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[[ASTER]] - 1 second ASTER Global DEM Version 2.
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[[Global Land Cover Characteristics Data Base (GLCC World)]] - Global Land Cover Characteristics Data Base Version 2.0 (Clutter database. Pathloss 5 only)
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== Commercial Terrain data ==
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Most commercial data is supplied in a rectangular projection (e.g UTM). Be sure to specify that the data must be provided in a BIL format. Setup instructions for Version 4 are available at [http://www.pathloss.com/downloads/docs/planet_utm.pdf http://www.pathloss.com/downloads/docs/planet_utm.pdf]
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[http://www.siradel.com http://www.siradel.com] - 1m to 100m resolution high quality map data available worldwide.
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[http://geoimage.fr/ http://geoimage.fr/] - 1m to 100m resolution maps available worldwide.
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[http://www.infoterra.fr/Infoterra/ http://www.infoterra.fr/Infoterra/] - 1m to 100m resolution maps available worldwide.
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[http://www.vexcel.com/ http://www.vexcel.com/]
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[http://i3.com/ http://i3.com/]
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[http://igage.com/ http://igage.com/] - Igage produces imagery datasets that cover the USA.

Latest revision as of 13:16, 11 October 2022

This page lists some common sources for terrain data that can be used with the Pathloss program. Pathloss 4 can only use elevation and imagery data.

Contents

NED vs SRTM in North America

In North America there is NED and SRTM. What is the difference? The short answer is the SRTM data tends to include land cover in its data (elevations are the tops of the tree canopy or built up areas), where the NED data tends to be bare earth.

Public Terrain data (Free of charge)

FetchSRTM - Download tool for finding and downloading SRTM, NED and NLCD terrain data.

USGS NED Data

NLCD - USGS National Land Cover Data in BIL format. (USA Only)

NED data in GridFloat format - NED data in GridFloat format

SRTM Data (Worldwide 1" & 3" resolution)

SRTM - USGS site for downloading SRTM elevation data.

SRTM30 - USGS site for downloading SRTM30 which is an upgraded version of GTOPO30 (30" data for the world)

Canadian Data

Geobase - Geobase elevation data (CDED), Vector data for roads etc. and satellite imagery for all of Canada.

NED data in GridFloat format - Very convenient FTP access to NED data in GridFloat format. The 1" files cover North America (Canada, USA and Mexico)

Toporama - 1:50,000 scale UTM projected topographic maps for Canada in GeoTiff format.

World Databases

Viewfinder Panoramas - Excellent resource to download free 3 second data for the world. This data is compiled from SRTM data with voids and artifacts filled in from other sources. See the SRTM section above for instructions on configuring for use in Pathloss.

ASTER - 1 second ASTER Global DEM Version 2.

Global Land Cover Characteristics Data Base (GLCC World) - Global Land Cover Characteristics Data Base Version 2.0 (Clutter database. Pathloss 5 only)

Commercial Terrain data

Most commercial data is supplied in a rectangular projection (e.g UTM). Be sure to specify that the data must be provided in a BIL format. Setup instructions for Version 4 are available at http://www.pathloss.com/downloads/docs/planet_utm.pdf

http://www.siradel.com - 1m to 100m resolution high quality map data available worldwide.

http://geoimage.fr/ - 1m to 100m resolution maps available worldwide.

http://www.infoterra.fr/Infoterra/ - 1m to 100m resolution maps available worldwide.

http://www.vexcel.com/

http://i3.com/

http://igage.com/ - Igage produces imagery datasets that cover the USA.