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The Scope: Usability & Utilization of Geoinformation
For answering questions like "where are we?" or "how to go there?" we need geoinformation. Geoinformation is also used for making maps. Geoinformations characteristic is its combination of geometry (position, size ...) and thematic information (e.g. building, forest etc.).
The analytic way to describe geometry of geoinformation is the coordinate-method. The coordinate systems used for geoinformation are called coordinate reference systems (CRS). Different task often also use different CRS. e.g. in construction engineering, national map making, cadastral, presentations... .
For many tasks, you need geoinormation from different sources. Often, they are hold in different coordinate reference systems. to use these different datasets together, you need to unify the coordinate reference system. Read e.g. [Voser 1996 graphic]-
For combined usage, geodatasets need to be in the same coordinate reference system
For the hamonization of coordinate refernece systems, you need various information and utilities.
  • knowledge about the coordinate reference systems of your datasets and your needs
  • the relationships between the coordinate reference systems, (methods and parameters...)
  • tools for manual or automated coordinate reference system change. Read e.g. [Voser 1997 (Arcinfo Application BEZUG graphic), Voser 2007 graphic]
Why MapRef?
Even nowadays (2017) it is difficult to find information of different coordinate refernce systems even though there exist offical collections.and many geospatial applications support offical crs and have databases with parameters for change.
MapRef was built up in 1996 as a collection of authoritative coordinate referense sytems, with the main focus Europe, namely geodetic reference systems, map projection as far as freely available. The author was and still is one of the few experts in this topics.