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Apr 14 99 04: 45p Hruce Harris 630 761 -0952 p. 4 <br /> Crab <br /> Crab must not exceed five degrees between any two cansecutive photographs nor more <br /> than three degrees on any one flight line. At the earliest opportunity, ncw photography <br /> must be acquired to replace rejected photographs or flight lines. <br /> Sidelan <br /> Sidelap must average 30 percent, +5 percent. Any adjacent negatives with sidelap of less <br /> than 25 percent or more than 35 percent will be rejected, and the affected flights will be <br /> reflown at the earliest opportunity. <br /> Tilt <br /> Any two successive negatives with tilt exceeding five degrees will be rejected, and new <br /> aerial photography for these areas acquired. Overali,tilt must average one degrees or less. <br /> e atives <br /> B1ack-and-white negarives must be clear and sharp in detail and uniform in density. The <br /> negatives must contain no static mazks,tears, scratches, or other blemishes that interfere <br /> with the intended purposes of the aerial photography. <br /> Aerial Fitm Positives <br /> Aerial film positives shall be prepared far the entire County at a scale of 1"=400' on <br /> 20"x30" clear stable base polyester film to match each newly created Macon County tax <br /> map. A total of 319 enlargements are to be prepared. <br /> Aerial film positive enlargements shall be prepared in the urban and suburban areas at a <br /> scale of]"= 100' on 20"x 30"clear stable base polyester film to match each newly <br /> created Macon County tax map. A total of 564 enlargements are to be prepared. <br /> Each aerial film positive will be pin registration punched to match its corresponding <br /> Macon County tax map. <br /> �ach aerial film positive will be rectified to rnatch to within+ 2%of the long dimension of <br /> the Macon County taac map as cartographed by the Contractor. No specifications can be <br /> made for match on maps not cartographed by the Contractor. <br /> US Geoiogical Survey Quadrangle sheets will be the base for control. <br /> The rectifying projector used to prepare the aerial film enlargements shall be equipped '� <br /> with the following. the tens mount of the projector shall be equipped with swing <br />