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Kharita Challenges

Problems

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

3 of 59 problems

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Track
Spatial Analysis0 problemsPostGIS / SQL1 problemPython0 problemsRemote Sensing1 problemCartography0 problemsWeb GIS2 problemsData Management3 problemsGIS Architecture3 problems
Level
Beginner0 problemsIntermediate0 problemsAdvanced3 problemsExpert0 problems
Hand in
SQL0 problemsPython0 problemsGeoJSON0 problemsAnswers0 problemsSchema1 problemDecisions2 problemsDataset file0 problems
Category
Data preparation0 problemsData quality0 problemsSpatial analysis0 problemsRaster analysis0 problemsCartography0 problemsDecision support1 problemGeospatial systems3 problemsWeb delivery1 problem
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GIS ArchitectureAdvancedGeospatial systemsClear all
  1. Not started, Design the global event map and detail serviceGeospatial systemsDecisions

    Separate a frequently refreshed spatial overview from authoritative event details and revision history.

    GIS ArchitectureadvancedDifficulty: advanced430 XP~65 min6 checks

    You hand in a set of design decisions.

    Dataset

    • Global M5.5+ earthquakes, Jan–Mar 2025 · Point · 86 features · EPSG:4326

    What you’ll do

    • Size the cost of browser fan-out against the measured snapshot
    • Choose a shared ingestion and overview delivery pattern
    • Separate global summary from per-event detail
    system designUSGSGeoJSON feedcacheevent revisionsglobalAlso trains Web GIS, Data Management
    Open problem
  2. Not started, Design the searchable imagery archiveGeospatial systemsDecisions

    Choose a search, storage, preview and revision pattern for an imagery service with reproducible results.

    GIS ArchitectureadvancedDifficulty: advanced460 XP~70 min5 checks

    You hand in a set of design decisions.

    Dataset

    • Greater London, Sentinel-2 red and NIR, 11 July 2025 · Raster · EPSG:32630

    What you’ll do

    • Separate scene discovery from pixel storage and map rendering
    • Select an access pattern suited to small viewport reads and flexible band expressions
    • Preserve exact-version provenance through corrections
    system designSTACcloud optimized GeoTIFFraster tilesprovenanceAlso trains Remote Sensing, Data Management, Web GIS
    Open problem
  3. Not started, Model event and airfield condition checksGeospatial systemsSchema

    Design a PostGIS schema that keeps earthquake events, airfields and repeated condition checks traceable.

    Data ManagementadvancedDifficulty: advanced520 XP~85 min12 checks

    You hand in a database schema (DDL).

    What you’ll do

    • Model stable event and airfield identities with timestamped condition observations
    • Declare point type and WGS 84 SRID at the database boundary
    • Build spatial and chronological indexes that support the response dashboard
    projectPostGISschemadata engineeringemergency responseAlso trains PostGIS / SQL, GIS Architecture
    Open problem