NASA’s Earth Observing System Data and Information System (EOSDIS) is NASA’s data distribution system. Currently, we can use the Alaska satellite facility (ASF) to download high resolution DEM 12.5m data from ALOS PALSAR.

PALSAR is a L-band synthetic aperture radar (SAR), which means it can acquire photos of all weather and observe all day and night. We will have 2 available product levels including high resolution product and low resolution product. Both resolutions for DEM 12.5m data are provided in Int16 and DEM formats.

  1. Access Earthdata and create an account or login.

2. Click Data Set and select ALOS PALSAR. Draw a polygon and choose the starting date and ending date.

2. Select the products (data type) that you want to download.

3.  Select the products (data type) that you want to download.

Finally, after unpacking the downloaded file, we will obtain the DEM data file in .tif format. Use GIS software to open and process the obtained DEM data.

References:
The Geo-ICT Blog (thegeoict.com)

Editor: AnhNTL – VidaGIS Company