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INVITATION TO BID SEALED PROPOSALS, endorsed "Bid on Aerial Photography" will be received by the City of San Marcos, Office of the City Manager, City Hall, San Marcos, Texas, until 20'clock P.M., cst, Tuesday March 25, 1958, at which time and place all bids will be publica11y opened and read aloud. Bids requested are for furnish- ing all services required for aerial photography, mosaics and mapping, all in accordance with the specifications. Specifications and bidding data may be ob- tained from the City of San Marcos, Box 13, San Marcos, Texas. I The right is reserved, as the interest of the City of San Marcos may require, to reject any or a 11 bids and waive informalities in bidding. CITY .bF SAN MARCOS B. R. Fuller City Manager * * * "* * * * * CITY OF SAN MARCOS San Marcos, Texas * * SPECIFICATIONS * * It is required that the bidder furnish all services, cameras, airplanes, equipment and supplies necessary to provide precision aerial photography for approximately twenty-five (25) square miles of an area encompassing the City of San Marcos and environs. The photography Shall be flown with suitable focal length lens and with the necessary forward overlap and sidelap coverage to compile a two foot contour interval topographic map, if and when required. The camera used shall be a pre- cision mapping camera, certified by a competent testing agency to meet the stan- dards prescribed by the National Bureau of Standards. I The Photo Atlas sheets shall be photographically copies from a mosaic constructed by an assembly of rectified prints ratioed and mounted to a semi- controlled accuracy standards. The delivery Photo Atlas Sheets, scale 1" = 200', shall under no conditions be enlarged more than three diameters from the scale of the aerial photographic negatives. The City of San Marcos will furnish dis- tances, as required, to meet the accuracy standards; however, stereotriangulation, radial plot, or equivalent system must be utilized to hold the required distances to a practical minimum consistent with the accuracy required. Specific requirements are, a. Aerial coverage of the area furnished on one (1) set double weight, semi-matted stereoscopic coverage prints and two (2) reduced prints of the stapled photo index assembly. b. Photo atlas sheets, scale 1" = 200', bound in book form and suitably indexed. Overall sheet approximately 18" x 30", sheets printed on semi-matted paper mounted on linen. Atlas sheets to be semi-controlled as to accuracy. Wall mosaic, scale 1" ., 500', mounted on masonite and suitably framed. ------------------- ----