Empowering Civil Engineers

Terrain & Earthworks

• DEM (Digital Elevation Model) — ground heights for grading, cut/fill and sight-lines.
  Products:
  DEMSA2 L1 (2 m DEM),
  SUDEM5 (5 m DEM), SRTM 90 m
• DSM (Digital Surface Model) — elevation of ground + features (trees/buildings) for obstacle checks & machine guidance.
  Products: DEMSA2 L2
• DTM (Digital Terrain Model) — bare-earth terrain for contours, longitudinal/ cross sections and drainage design.
  Products: DEMSA2 L3
• Contours, Slope, Aspect, Curvature — design grades, platform layout, cut/fill balance, slope stability context.
  Products: DEM derivatives (DEMSA2/SUDEM); Contours product.

Drainage & Stormwater

• Flow Direction & Flow Accumulation — downslope paths and upslope area to place inlets, drains and attenuation.
  Products: Hydrology suite (from DEMSA2/SUDEM)
• HAND (Height Above Nearest Drainage) — relative height to the channel network; screens wet/flood-susceptible ground.
  Products: HAND layer
• TWI (Topographic Wetness Index) — terrain-driven wetness potential; flags soggy ground/soft spots.
  Products: TWI (from DEMSA2/SUDEM).
• Catchments / Sub-catchments — delineations for rational/CSM sizing and outlet siting.
  Products: Catchment delineations

Floodplain & Hydraulic Modelling

• FHI (Flood Hazard Index) — composite inundation susceptibility for early screening.
  Products: FHI layer
• Model-ready terrain — high-res DTM for 1D/2D HEC-RAS meshes and cross-sections; stream order network to seed channels.
  Products: DEMSA2 L3 , Stream Order Network Delineation
• Distance to Rivers / Wetlands / Waterbodies / Ocean — riparian buffers, bridge/culvert siting, coastal set-backs.
  Products: Distance-to water layers 

Geotechnical & Materials

• Soil Erodibility (K-factor) — inherent susceptibility to sheet/rill erosion (USLE/RUSLE standard).
  Products: K-Factor layer
• Soil Drainage Rate — daily drainage potential; informs pavement subgrade risk and dewatering.
  Products: Soil Drainage Rate
• Majority Soil Type & Soil Potential — dominant soil class & behaviour for cut/fill and borrow planning.
  Products: Majority Soil Type / Soil Potential
• SA Geology — bedrock/surface geology for materials, slope stability context and foundations.
  Products: SA Geology layer

Environmental & Permitting screening 

• SANLC 2018 Land Cover — national 20 m classes for baseline & change checks.
  Products: SANLC 2018 Land Cover
• Vegetation & Biomes (SANBI) — ecosystem sensitivity and conservation status.
  Products: National Vegetation & Biome Map
• Protected Areas (SAPAD/PACA) — proclaimed areas; early no-go/low-impact flags.
  Products: Protected & Conservation Areas 

Context & Logistics

• Road Networks — access, haul and detour planning.
  Products: Roads base layer
• Municipal Districts / Wards — reporting jurisdictions and permitting lines.
  Products: Admin Boundaries pack
• Survey Grid / Index Sheets — mapping references and data ordering frames.
  Products: Survey Grid information