(under the class definition) Subject matter wherein the projection system is especially adapted to project an image (usually an aerial photograph of the terrain) on a surface for making a map, or to compensate for the orientation of the camera which produced the aerial photograph being projected, or to align or superimpose parts of such aerial photographs.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1, for projection of a map or projection of a target or spot
light on a map.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
1, for similar subject matter combined with measuring means and subclasses 20.1+ for similar subject matter combined with a claimed scribing or tracing means. 250, Radiant Energy, for similar subject matter employing photocells.
348, Television,
144+, for television systems in which images of maps may be projected to effect a comparison of the maps.
356, Optics: Measuring and Testing,
391+, for projecting images of maps to compare them.
