Posted on February 19, 2023 (Updated on July 10, 2025)
QGIS 3.4: Why does DEM not appear after 3D configuration?
Hiking & ActivitiesHow do I add a DEM file to QGIS? To work with DEMs, you should use QGIS’ all-in-one DEM (Terrain models) analysis tool. Click on the menu item Raster ‣ Analysis ‣ DEM (Terrain models). In the dialog that appears, ensure that the Input file is the DEM layer. Set the Output file to hillshade.
Posted on February 19, 2023 (Updated on July 10, 2025)
Characteristics of different methods to convert ECEF to LLA
Hiking & ActivitiesWhat are the different ways to write longitude and latitude? The numerical values for latitude and longitude can occur in a number of different units or formats: sexagesimal degree: degrees, minutes, and seconds : 40° 26′ 46″ N 79° 58′ 56″ W. degrees and decimal minutes: 40° 26.767′ N 79° 58.933′ W. decimal degrees: +40.446
Posted on February 19, 2023 (Updated on July 10, 2025)
Compatibility PyQt5 and PyQt4
Hiking & ActivitiesIs PyQt4 compatible with PyQt5? PyQt5 can be installed alongside PyQt4 using the same Python interpreter without any problems so long as they are built with the same version of SIP. What is difference between PyQt4 and PyQt5? PyQt4 supports a number of different API versions ( QString , QVariant etc.). With the exception of
Posted on February 19, 2023 (Updated on July 10, 2025)
Serving supplemental layers from tileserver-gl
Hiking & ActivitiesWhat is TileServer GL? TileServer GL is an open-source map server made for vector tiles, and able to render into raster tiles with MapLibre GL Native engine on the server side. TileServer GL provides maps to the web and mobile applications. What is an MBTiles file? MBTiles is a file format for storing tilesets. It’s
Posted on February 19, 2023 (Updated on July 10, 2025)
Learning resources for SAR images?
Hiking & ActivitiesHow do you read SAR imagery? How do I interpret SAR images? Water. Regions of calm water and other smooth surfaces appear black (the radar reflects away from the spacecraft). Surfaces. Rough surfaces appear brighter, as they reflect the radar in all directions, and more of the energy is scattered back to the antenna. Slopes.
Posted on February 19, 2023 (Updated on July 10, 2025)
Atlas Generation attribute table feature filter
Hiking & ActivitiesHow do I filter features in attribute table in QGIS? Filtering In the Layers Panel, double-click on the layer you wish to filter. The Layer Properties window will open. Click on the General tab. Go to the Query Builder at the bottom right and click on it. You can now enter a Query. Click on