The layer defines the elevation of the top surface of the Linwood Gravels geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Eastern Canterbury Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the top surface of the Avonside Member geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Eastern Canterbury Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the top surface of the Burwood Gravels geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Eastern Canterbury Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the basal surface of the Avonside Member geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Christchurch Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the basal surface of the Christchurch Formation geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Christchurch Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the basal surface of the Springston Formation geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Christchurch Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the basal surface of the Heathcote Formation geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Christchurch Geological Model built using Leapfrog Geo software.

The layer defines the elevation of the basal surface of the Early-middle Quaternary geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Christchurch Geological Model built using Leapfrog Geo software.

Major hydrological basins and their sub-basins. This dataset divides the African continent according to its hydrological characteristics. The dataset consists of the following information:- numerical code and name of the major basin (MAJ_BAS and MAJ_NAME); - area of the major basin in square km (MAJ_AREA); - numerical code and name of the sub-basin (SUB_BAS and SUB_NAME); - area of the sub-basin in square km (SUB_AREA); - numerical code of the sub-basin towards which the sub-basin flows (TO_SUBBAS) (the codes -888 and -999 have been assigned respectively to internal sub-basins and to sub-basins draining into the sea)

The layer defines the elevation of the top surface of the Riccarton Gravels geological unit as a contour ArcGIS shapefile. The layer has been derived from the 3D Eastern Canterbury Geological Model built using Leapfrog Geo software.