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Measuring Off Cropped Enlargements with a Digitizing Tablet
Author(s) -
Warner W. S.,
Carson W. W.
Publication year - 1996
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 - 10.1111/0031-868x.00068
Subject(s) - orientation (vector space) , scale (ratio) , computer science , sample (material) , measure (data warehouse) , ranging , computer graphics (images) , computer vision , artificial intelligence , mathematics , cartography , database , geography , geometry , telecommunications , physics , thermodynamics
A standard digitizing tablet was used to measure objects off cropped enlargements (1:1000 scale), with an absolute accuracy of 0.75 m. Interior orientation for the enlargements was based upon camera reference marks captured from the original photographs, ranging from 1:6000 to 1:15 000 scale. Control for exterior orientation was provided by 1:1000 scale maps. Operational procedures are outlined, followed by results from eight sample photographs. Particular attention is devoted to errors that influence measurement accuracy.