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What is GIS? What are its applications?

Geographical information sciences is the science of computerized data management, used to capture, store, manage, retrieve, analyze, and display spatial information (NOAA). It integrates disciplines and technologies including remote sensing, surveying, photogrammetry, spatial analysis, cartography, and computer science. 299 more words

Dissolve polygons in R

Dissolving polygons is another fairly elementary GIS task that I need to perform regularly. With R this is can be a bit involved, but once done is fully reproducible and the code can be re-used. 550 more words


Clipping polygons in R

Clipping polygons is a basic GIS task. It involves removing unneeded polygons outside of an area of interest. For example, you might want to study all local authorities (LADs) in the Yorkshire and the Humber region but can only obtain shapefiles that contain all the LADs in the UK. 885 more words