Digital Geography

Innovative SRTM Download

It’s been a couple weeks since I’ve posted here, but I just found something I wanted to pass along. If you work with geospatial data, you are probably familiar with the Shuttle Radar Topography Mission (SRTM) that collected elevation data over much of Earth. These data are available from a number of interfaces on the Web, but this is one of the nicest, and most innovative, ones I’ve found. SRTM Tile Grabber Just find the spot on Earth you are interested in and you can download the SRTM data for that area as a geotiff. I think this is probably…

QGIS Plugin – Profile Tool

Previous Posts in this series QGIS Plugin – RasterCalc QGIS Plugin – OpenLayers   So, this will be a pretty quick post on one of my most used QGIS plugins, the Profile tool. The Profile tool can be downloaded from the central QGIS plugin repository HERE. In a nutshell, the Profile tool allows you to draw a line in your QGIS project area and get the profiles of various layers in your project, as seen here: The most obvious use of this tool is looking at terrain profiles, and it certainly is very useful for this. However, in the example…

Free Sources of Geospatial Raster Data

I’m always looking for good sources of free data, so I thought I would post a few here in case they were useful to others. The sources listed below tend to be larger providers of regional to global level data, however, please post suggestions in the comments if there are other sources you like and think should be added. I had initially planned to include vector data here, but I think that will be another post as this one got quite long. SAR Data Free Synthetic Aperture Radar data can be some of the hardest to find, but it is…