Geographical Data from Analogue Maps
Analogue maps have been a popular source of data for GIS. When an organisation first develops a GIS database, analogue maps are often the main source of data because digitising them is usually more cost effective than collecting data using land surveying, photogrammetry, or other data acquisition methods. Although data digitised from maps are usually less accurate, we can skip many of the elaborate and tedious steps of undertaking measurements on the ground and on stereo models. Moreover, collecting data from a map can cover much more ground in much less time, without any accessibility problems.
KeywordsControl Point Similarity Transformation Geographical Data Projective Transformation Raster Image
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