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Mapping small areas using a low‐cost close range photogrammetric software package with aerial photography
Author(s) -
Aguilar Manuel A.,
Aguilar Fernando J.,
Agüera Francisco
Publication year - 2005
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.2005.00331.x
Subject(s) - photogrammetry , scanner , aerial photography , software , photography , remote sensing , computer graphics (images) , computer science , scale (ratio) , computer vision , digital camera , geography , artificial intelligence , cartography , art , visual arts , programming language
Generating maps of small areas using conventional aerial photography is of great interest for small engineering firms. The main problem is the high cost of the sophisticated digital photogrammetric workstations usually employed. In this paper, a low‐cost close range photogrammetric software package is used to measure the three‐dimensional coordinates of points on the land surface from a photogrammetric flight at a scale of approximately 1:5000. Furthermore, the influence of the type of scanner used to digitise photographs (consumer‐grade or photogrammetric scanner), the resolution of the digital images and the number of control points required are examined. The root mean square errors obtained at the check points, using a low‐cost close range software package, scanning aerial images with a photogrammetric scanner and 24 ground control points, were around 116 mm for X and Y coordinates, and 191 mm for Z. These levels of accuracy allow the generation of planimetric maps at a scale of 1:1500 and topographic maps with a contour interval of around 1 m. When the images were scanned with a consumer‐grade scanner, the root mean square errors were around 150 mm for X and Y, and 271 mm for Z.