Sample Datasets

Datasets:

SUDEM5

Sudem5 Helshoogte

Product: SUDEM5

  • Description:
    High-resolution digital elevation model (DEM) with a spatial resolution of 5 m
  • Metadata:
    • Data packaging: The DEM is represented by a 32-bit GeoTIFF (.tif) containing the elevation data;
    • No Data value is set to “-9999”
    • Projected coordinate system : Lo21 datum based on the Hartebeesthoek94 ellipsoid
  • Download Links:

DEMSA2 L1

Demsa2 L1 Helshoogte

Product: DEMSA2 L1

  • Description:
    A very high-resolution digital surface model (DSM) with a spatial resolution of 2 m
  • Metadata:
    • Data packaging: The DSM is represented by a 32-bit GeoTIFF (.tif) containing the elevation data;
    • No Data value is set to “-9999”
    • Projected coordinate system: LO coordinate system based on the Transverse Mercator projection, with the Hartebeesthoek 1994 used as the datum.
  • Download Links:

DEMSA2 L2

Demsa2 L2 Helshoogte

Product: DEMSA2 L2

  • Description:
    A very high-resolution digital surface model (DSM) with a spatial resolution of 2 m.
  • Editing was performed on the DSM to improve accuracy and remove any possible errors and fix waterbodies
  • Metadata:
    • Data packaging: The DSM is represented by a 32-bit GeoTIFF (.tif) containing the elevation data.
    • No Data value is set to “-9999”.
    • Projected coordinate system: LO coordinate system based on the Transverse Mercator projection, with the Hartebeesthoek 1994 used as the datum.
  • Download Links:

DEMSA2 L3

Demsa2 L3 Helshoogte

Product: DEMSA2 L3

  • Description:
    A very high-resolution digital terrain model (DTM) with a spatial resolution of 2 m.
  • At least 95% of all surface features taller than 1.5 are removed from the DSM (DEMSA2 L2) to create the DTM;
  • Metadata:
    • Data packaging: The DTM is represented by a 32-bit GeoTIFF (.tif) containing the elevation data.
    • No Data value is set to “-9999”.
    • Projected coordinate system: LO coordinate system based on the Transverse Mercator projection, with the Hartebeesthoek 1994 used as the datum.
  • Download Links:

CONTOURS

Contours 5m Helshoogte

Product: CONTOURS

  • Description:
    Contours derived from a very high resolution digital terrain model (DTM) with a spatial resolution of 2 m.
  • Metadata:
    • The contours are represented as vector data (shapefile) or in CAD format (.dwg/.dxf).
    • Contour interval: # metres
    • No Data value is set to “-9999”
    • Projected coordinate system : LO datum based on the Hartebeesthoek94 ellipsoid
  • CAD Format Download Link (.dwg / .dxf):

FHI

FHI Cpt Colour

Product: FLOOD HAZARD INDEX (FHI)

  • Description:
    • FHI is a 5 m spatial resolution index where the classes indicate relative likelihoods of being flooded based on terrain features
    • The model showed results with an accuracy of 84% (i.e. the model correctly predicted a specific location’s flood hazard 84 out of 100 times).
    • The FHI is represented by four classes namely:
      very high (4), high (3), moderate (2) and low (1).
  • Metadata:
    • The FHI is represented by an 8-bit GeoTIFF (.tif) containing the index classes.
    • No Data value is set to “0”
    • Projected coordinate system : Lo21 datum based on the Hartebeesthoek94 ellipsoid
  • Download Links:

Comparison Packs

DEMSA Comparison Visual

Product: Elevation Model Comparison Packs

  • Pack Content:
    • Elevation Models covering the same extent for product comparison purposes.
    • DEMSA2 L1, DEMSA2 L2, DEMSA2 L3, SUDEM5, SRTM
  • Location Packages:
CGA
SU Corporate Horizontal With Slogan RGB 01
Geo Web Artboard 11
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