Glossary for Geospatial Science

Zoom Transfer Scope or ZTS:� An optical-mechanical device produced and marketed by Bausch and Lomb.� With it you can view and overlay two images through separate optical paths.� Usually one eye views a reference map and the other a portion of a color airphoto.� The scale, position, and orientation of either optical path can be changed so that the airphoto matches the map in some local area.� You then refer to the airphoto and mark interpretation lines on the map or a transparent overlay.� As the airphoto is moved slightly to register another subsection, you compile a map that has a minimum amount of distortion induced by the airphoto.