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Kharita Challenges

Problems

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

1 of 59 problems

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Track
Spatial Analysis1 problemPostGIS / SQL0 problemsPython0 problemsRemote Sensing0 problemsCartography1 problemWeb GIS3 problemsData Management0 problemsGIS Architecture1 problem
Level
Beginner1 problemIntermediate1 problemAdvanced0 problemsExpert0 problems
Hand in
SQL0 problemsPython0 problemsGeoJSON0 problemsAnswers1 problemSchema0 problemsDecisions0 problemsDataset file0 problems
Category
Data preparation0 problemsData quality1 problemSpatial analysis1 problemRaster analysis0 problemsCartography2 problemsDecision support4 problemsGeospatial systems0 problemsWeb delivery1 problem
  1. Not started, At which zoom does every capital get its own tile?Web deliveryAnswers

    Count capitals per XYZ tile across zooms to decide where a label layer switches from clustering to one label per city.

    Web GISintermediateDifficulty: intermediate180 XP~25 min4 checks

    You hand in your answers as values.

    Dataset

    • Populated places · Point · 1,251 features · EPSG:4326

    What you’ll do

    • Convert points to tile indices at several zooms
    • Find the busiest tile per zoom
    • Choose a switch-over zoom from the data
    XYZ tileslabelsclusteringzoom levelsglobalAlso trains Cartography
    Open problem