Mono and stereo digitizing of large scale mapping based on aerial photograph of digital mapping camera
Mustaffa Shahim , Anuar Ahmad, Mohamad Kamali Adimin and Mohamed Sofian Abu Talib
In aerial photogrammetry, the trend is moving away from analog to digital systems especially in the production of topographic map. Many private or government mapping organizations around the world have started using digital mapping camera system even though the price is very expensive. These organization change their way of producing topographic map because the digital mapping camera offers various advantages such as cost saving, time saving, high quality photogrammetric output such as maps, contour lines, digital terrain model (DTM), orthophoto etc, new application areas and it could eliminate analog step in the image processing production line. Due to these advantages, in 2007 the Department of Surveying and Mapping Malaysia (DSMM) has purchased the digital mapping camera system of Zeiss Integraph. DSMM purchased the digital mapping system with the objectives to speed up the process of mapping the country and to provide the best quality photogrammetric output using state of the art technology in aerial photogrammetry. This paper discusses about the experience of producing large scale map using mono and stereo digitizing based on aerial photograph captured by the digital mapping camera. In general, it is a common practice in aerial photogrammetry to use stereo digitizing technique in producing photogrammetric output. The Department of Surveying and Mapping Malaysia (DSMM) uses this technique to generate three dimensional (3D) stereomodel and subsequently digitizing is performed for natural features such as rivers, lakes, vegetation etc and man-made features such as roads, buildings, bridges, drainage etc. Also from the 3D stereomodel contour lines, DTM and orthophoto are generated.
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