PHOTOGRAPHY - High-altitude

                           UNITED STATES
                    DEPARTMENT OF THE INTERIOR
                         GEOLOGICAL SURVEY
                     Water Resources Division
                        Washington 25, D.C.

In reply refer to:                            December 29, 1958
                                              Code 4052 0001


To:       District Chiefs and Staff Officials, Ground Water Branch

From:     Chief, Ground Water Branch, Washington, D.C.

Subject:  PHOTOGRAPHY - High-altitude

Attached for your information and use is the latest index map of
the United States, showing the availability of high-altitude
photography and related materials.

Information regarding the material available and the method of
procuring it is given on the back of the map.  Your attention is
called to the availability of Stereo-manuscripts, or 200-foot
supplemental contour.  These manuscripts of flat terrain carry a
50-foot supplemental contour.  These manuscripts were used in
compiling the small scale (1:250,000) contour maps prepared by the
Army Map Service, and are available for most of the United States.
The manuscripts generally show section or township lines; however,
they should be of considerable value for work in areas not covered
by Standard Survey Topographic Maps.

                           (s) A.N. Sayre

Attachment FO-L3, SL only

Distribution:  A, B, S3, FO-L3, SL