Vol.42-4 ABSTRACT4

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Abstract

With the progress of computer science, many different kinds of automatic map recognition systems have been developed. To evaluate the capability of these systems, we have developed a procedure that employs bench-mark maps, i.e., standard map data sets for evaluating the systems.
    This procedure consists of three key components.
1)  Standard raster map data that are to be processed by automatic recognition systems. Printed maps are scanned to produce raster data. The scales of the maps are 1/2,500 and 1/25,000.
2)  Reference vector data are prepared from the standard raster map data. These vector data have sufficient accuracy as "ideal" data.
3)  A set of evaluation programs that compare the results of automatic recognition of standard raster map data with the reference vector data. The key points of the evaluation are as follows:
  a) geometrical accuracy,
  b) feature identification.
  Some recognition systems developed by venders and developers of GIS (Geographic Information System) are evaluated using the bench-mark maps. The recognition capability of each system is examined in each of the cartographic symbols.