Ninety years ago National Geo-spatial Information (NGI), a component of Department of Rural Development and Land Reform (DRDLR) commenced with the establishment of an integrated survey system and provision of extensive mapping coverage of the country. NGI is also known as South Africa's national mapping organisation.
The integrated survey system expedites and facilitates orderly development while the mapping and associated products facilitate sustainable development. In more recent years, NGI established an active control survey network of continuously operating GNSS base stations covering South Africa all managed and controlled by a single control centre situated in the offices of NGI.
NGI has the largest and most extensive archive of aerial photography and imagery dating back to 1926 with numerous national coverages. The imagery has evolved significantly over time, and, since 2008, all imagery are acquired with high resolution digital sensors in both colour (RGB) and CIR (colour infra-red).
The integrated topographic information system (iTIS) portal is currently being developed to provide intranet and internet users access to the iTIS using a Web Feature data Server (WFS), Geography Markup Language (GML) data Server, Web Map Service (WMS) and access to imagery.
The WFS and GML data Servers will permit database connection to the iTIS. GML is an open format developed by the Open Geospatial Consortium (OGC). The WMS will provide thin-client access to the iTIS in order to create customised maps which can then be downloaded by the user.