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PROPRIETARY TO FOSS: MAPSERVER AS A KEY COMPONENT IN THE MAP DISTRIBUTION INFRASTRUCTURE OF THE NORWEGIAN SDI
Norwegian Mapping Authority (Statens kartverk) is the central distribution node of the Norwegian Spatial Data Infrastructure Norway digitally (Norge Digitalt), a cooperation between more than 600 public agencies within Norway. Statens kartverk produces and is responsible for some of the most vital mapping services in the infrastructure, the background or base maps, which are utilised by a variety of applications (desktop and web) developed by the agencies. Both topographic and thematic maps and sea charts are delivered through map services, the data source for the services is both raster and vector. Statens kartverk operates more than 20 mapping services with traffic amounting to 300 000 regular wms maps and around 2 500 000 cached tiles per day. To cope with this amount of traffic, Statens kartverk is close to completing the move from an architecture based on ArcIMS, ArcSDE and Oracle to a completely opensource platform using Mapserver, GeoWebCache, PostgreSQL/PostGIS. In house software development has been used to tackle the issues of access security and the administration of the infrastructure. With current infrastructure Staten kartverk’s capacity is approximately 2 000 000 standard WMS images per day. The infrastructure in place is virtualised on VMware and so easily scalable, both up and down. All the services that Statens kartverk operates are available for partners within Norge Digitalt, and some of the services in a non-commercial environment for other users including the public.
Pål Kristensen - Norwegian Mapping Authority