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Kharita Challenges

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Real geospatial problems, graded automatically. Choose a track, a level and what you want to hand in.

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Spatial Analysis2 problemsPostGIS / SQL1 problemPython3 problemsRemote Sensing1 problemCartography1 problemWeb GIS0 problemsData Management7 problemsGIS Architecture0 problems
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SQL0 problemsPython0 problemsGeoJSON0 problemsAnswers1 problemSchema0 problemsDecisions0 problemsDataset file0 problems
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Data preparation0 problemsData quality1 problemSpatial analysis0 problemsRaster analysis6 problemsCartography0 problemsDecision support1 problemGeospatial systems1 problemWeb delivery0 problems
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Remote SensingData qualityClear all
  1. Not started, Accept the rasters, or send them backData qualityAnswers

    The checks a data manager runs on delivered rasters before anyone analyses them: extent, nodata, value range, and whether the figures are plausible for the place.

    Data ManagementintermediateDifficulty: intermediate200 XP~35 min6 checks

    You hand in your answers as values.

    Datasets

    • Greater London elevation (Copernicus DEM GLO-30) · Raster · EPSG:4326
    • Greater London land cover 2021 (ESA WorldCover 10 m) · Raster · EPSG:4326
    • Greater London, Sentinel-2 red and NIR, 11 July 2025 · Raster · EPSG:32630

    What you’ll do

    • Read raster metadata and full-resolution statistics
    • Distinguish nodata from valid extremes
    • Record facts a later dispute can start from
    raster QAnodatametadataacceptanceLondonAlso trains Remote Sensing
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