BID - Aerial Mapping 2003

The document is a request for proposal (RFP) for a photogrammetry project for the City of Frederick. The document outlines the requirements and specifications for the project, which aims to benefit the people of Frederick City and County by creating aerial mapping digital photo image files. The document specifies that the photogrammetrist must provide a map showing proposed flight paths, photo coverage, and photo stop points before beginning any aerial mapping sessions. The flight planning and implementation must adhere to certain standards, such as specific flight line orientations, sidelap and endlap requirements, and acceptable weather conditions. Regarding the aerial camera, film, and negatives, the document states the use of a precise aerial mapping camera with specific focal length and forward motion compensation. The camera must produce high-quality negatives with fiducial marks. The film used must be fine-grained and high-speed. All photographic negatives will become the property of the City. Image control requirements include radiometric balancing, seamless mosaicking of raster images, perfectly matched tiled raster image edges, and removal of imperfections. The document also specifies the use of TIN-based rectification and the required file format for raster images. For ground control, the document mentions the existence of horizontal and vertical control survey marks within the City Limits, which can be used to locate Photo I.D. objects. The photogrammetrist is responsible for setting aerial targets and providing sufficient geodetic control to support mapping and digital orthophotography. The control must meet or exceed the National Map Accuracy Standards. The document also emphasizes the preparation and delivery of two sets of contact prints of the original aerial negatives. One set will be inspected by the City for quality control, while the second set will be used for Photo I.D.'s. The contact prints must be clear, sharp, and have uniform tone, allowing ground details to show clearly throughout dark and light areas. Overall, the document provides detailed specifications and requirements for the photogrammetry project, aiming to create high-quality aerial mapping digital photo image files for the benefit of the people of Frederick City and County.