-362
[:3] T.J.. Blachut, "Mapping and Photointerpretation
System Based on Stereo-Orthophotos',
1971. Publication No. 12281. National
Research Council of Canada,
Ottawa, Ontario.
[ 4] T.J. Blachut, "Das Stereoorthosystem, eine neue
Losung auf dem Gebiete der Kartierung
und Photointerpretation", Vermessung,
Photogrammetrie, Kulturte.hnik,
No. 1, 1972.
[ 5] Published and unpublished information received from
various manufacturers of orthophoto equipment.