Posted on February 14, 2023 (Updated on July 10, 2025)
Counting rooftops in QGIS?
Hiking & ActivitiesHow do I extract a building footprint in Qgis? Extract buildings through QGIS Open QGIS. From the menu, select Layers -> Add Layer -> Add Vector layer… . Select the . When prompted about the layer you want to add, you can only select the multipolygons layer (it’s OK if you add all of them,
Posted on February 14, 2023 (Updated on July 10, 2025)
Looking for a Provider of UK boundary data
Hiking & ActivitiesWhere can I find data UK? You can use data.gov.uk to search and browse published datasets. Alternatively, you can use an API to search and get data from data.gov.uk. If you cannot find the data you need, you can send a data request. What is the ONS index of place names? About the IPN The
Posted on February 14, 2023 (Updated on July 10, 2025)
How do I make KML overlays appear in OpenLayers at all zoom levels?
Hiking & ActivitiesWhat is the maximum zoom level in OpenLayers? The available zoom levels are determined by maxZoom (default: 28), zoomFactor (default: 2) and maxResolution (default is calculated in such a way that the projection’s validity extent fits in a 256×256 pixel tile). What is resolution in OpenLayers? OpenLayers resolutions are meters per pixel so if 10mm
Posted on February 14, 2023 (Updated on July 10, 2025)
Configure new SQL view doesn’t appear for different DB’s in the same PostGIS Database
Hiking & ActivitiesHow to view multiple databases in Postgres? A single Postgres server process can manage multiple databases at the same time. Each database is stored as a separate set of files in its own directory within the server’s data directory. To view all of the defined databases on the server you can use the \list meta-command
Posted on February 14, 2023 (Updated on July 10, 2025)
How to merge all raster files in a folder using gdal_merge?
Hiking & ActivitiesHow do I merge raster files? Open the Mosaic To New Raster tool by navigating to ArcToolbox > Data Management Tools > Raster > Raster Dataset. Insert the raster files. Select the output location. Specify a name and extension for the output. Specify the pixel type. Specify the number of bands. How do I
Posted on February 14, 2023 (Updated on July 10, 2025)
Rasterization in different bands
Hiking & ActivitiesWhat is rasterization in GIS? Rasterization or Rasterisation is the task of taking an image described in a vector graphics format (shapes) and converting it into a raster image (pixels or dots) for output on a video display or printer, or for storage in a bitmap file format. What is burn in value in rasterize?