Revision as of 11:28, 10 August 2021

Description

The FetchSRTM tool finds and downloads SRTM and NED terrain data. The tool allows the user to batch download larger areas and saves and decompresses the data to a user defined location.

The tool can be downloaded at https://www.pathloss.net/fssetup.exe

SHA256 hash https://pathloss.net/SHA256

You will require an Earthdata account to access the 1" SRTM data. You can register for an Earthdata account at https://urs.earthdata.nasa.gov/users/new

How To use the tool

• Click Set directory to set the location of the downloaded files. This is the location where the program will decompress and save the files

• Enter the bounding coordinates of the area of interest. The graphic below shows an example of how to read the bounding coordinates from the Pathloss Network grid. The coordinates are entered as whole numbers (no decimal or minutes and seconds) Be sure to use negative values in the western and southern hemispheres.

• Select the Data type you want to download. The USGS 1/3" NED files are large and can a long time to download

• Click Fetch to start the download.

• If you have selected 1" SRTM as the data type, you will be prompted to enter your Earthdata login credentials. A cookie will be stored and subsequent downloads will not require the login. The FetchSRTM tool does not store your Earthdata user name or password.

• The download will begin and download progress is displayed. Previously downloaded data will not be overwritten, these files are skipped.

• The files will be automatically unzipped and saved in the directory that was selected.

• NED 1/3" files are large and can take considerable time to download.

• NLCD files require post processing and can take a considerable amount of time to download and convert.

Changelog

Version 1.0.1.3 August 10, 2021

• Updated 1/3 NED file locations

Version 1.0.1.2 July 29, 2021

• Updated NLCD to NLCD2019 for CONUS and added NLCD2011 for Alaska

Version 1.0.1.1 February 28, 2020

• Added USGS NLCD2016 data source. The files have been re-projected and cover a 3x3 degree area. You will need the latest Pathloss 5.1 update in order to use this data.

Version 1.0.1.0 November 5, 2019

• Added USGS staged data from AWS
• Fixed bug when downloading at 0 degrees longitude

Version 1.0.0.9 June 17, 2019

• Fixed bug that skipped some 1/3" NED files
• Added multi-threaded support
• Added additional progress bar to show file processing

Version 1.0.0.8 March 15, 2019

• Added support for proxy servers
• File directory is now saved
• Downloaded files are organized by type in separate directories
• Added cancel option without closing program

Version 1.0.0.7 January 15, 2019

• Fixed naming convention problem with NLCD 3x3 degree files

Version 1.0.0.6 January 9, 2019

• Added NLCD data in BIL format. These are downloaded in 3x3 degree blocks
• Alternately named NED files are now automatically detected and downloaded

Version 1.0.0.5 December 18, 2018

• Fixed expired cookie bug

Version 1.0.0.4 April 12, 2018

• Added option to download Ned 2" data for Alaska
• Added option to use older files names. By default the program will download the newest files. If there no maps found then this option will use the older map names.

Version 1.0.0.3 January 5, 2018

• Fixed USGS SRTM file locations

Version 1.0.0.2 May 5, 2017

• Fixed expired cookies not being updated
• Fixed the download counter

Version 1.0.0.1 Nov 10, 2016

Initial release