Tender for the appointment of a professional service provider for an airborne survey to acquire accurate (1) digital aerial imagery, (2) lidar survey that includes Digital Terrain Model (DTM), Digital Surface Model (DSM), Digital Elevation Model (DEM) and contours data, (3) georeferenced ortho-images and (4) survey control points (ground and airborne) for the City of Tshwane as and when required for a period of three (3) years