Windows open tar xz8/11/2023 ![]() I wished it had an option to change basemap for viewing purposes. This is a nice and simple web app that allows you to quickly download SRTM tiles (1°×1° tiles). If you're not sure where you placed the file, you can search for specific file types (such as. If you downloaded the file from the internet, you'll usually find it in your Downloads folder. Option 3 requires a USGS Earth Explorer account. You can find this two-toned smiley face icon in your Dock. Option 2 requires an email address for monitoring download progress Options 1 and 4 requires a NASA Earth Data account to download data. These accounts are free but you need to register first before you can download data. NOTES: Some sources require an account to download data. QGIS with GDAL support can natively read the hgt files (as long as the file hasn’t been renamed)įor more information on SRTM, check out the resources linked below: For more verbose output, use the -v option. tar auto-detects the compression type and extracts the archive. To extract a tar.xz file, invoke the tar command with the -extract ( -x) option and specify the archive file name after the -f option: tar -xf. *IMPORTANT: the name of the *.hgt file actually contains the source of the file’s georeferencing or coordinate system – DO NOT rename the file, otherwise it will not display properly Since the Windows 10 Preview Build 17063, bsdtar is included with PowerShell. For example, the file N45W122.hgt contains data from 45°N to 46°N and from 122☎ to 123☎ inclusive. The filename of the *.hgt file is labeled with the coordinate of the southwest (bottom left corner) cell. SRTM comes in either 1-arc second (30 meters) or 3-arc seconds (90 meters) and are divided into 1°×1° data tiles.ĭata downloads are distributed as a zipped file in *.hgt format. ![]() Version 1 is the semi raw data (which you do not want), version 2.1 is non-void filled, and version 3 (SRTM Plus) is void-filled. ![]() If you are not familiar with SRTM data, here are some quick notes on to keep in mind. To view archive's content, open tar file in PeaZip with double click (if file extension is associated with the application), or using system context menu 'Open as archive' entry, that will attempt to read any user provided file type regardless file type associations - this option is also available in PeaZip's context menu. ![]() This tutorial provides detailed instructions for option 4 which is using the SRTM downloader plugin directly in QGIS (version 3.22). Below are some options with some tips on downloading and using the SRTM data. There are various ways you can download this data. But for this tutorial I will show you how to generate contours from a publicly available DEM using QGIS.įor this tutorial, I am using a 30-meter (1-arc-second) SRTM DEM. I primarily use ArcGIS Pro at work to generate contours with ESRI provided terrain data or Lidar derived DEM. I often get asked to create contours from DEM for engineers and architects for site planning purposes. ![]()
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