M.J. Harden Associates has announced that its selection by Black & Veatch to provide photogrammetric mapping services in conjunction with a Flood Insurance Study for the Federal Emergency Management Agency (FEMA).
The project area includes five sites totaling approximately 15,000 acres in Big Stone, Brown, and Swift Counties in the Minnesota River Basin. MJH will provide aerial photography, aerial film scanning; GPS control surveys, analytical aerotriangulation, and digital mapping. MJH technicians will develop contours at a two-foot interval using Digital Terrain Modeling (DTM) techniques. The digital aerial images will be rectified to true ground position at mean terrain on a pixel-by-pixel basis. Limited planimetric detail will also be collected.
MJH will deliver photographic contact prints; flight index; aerial triangulation report; paper plots of plan and contour base maps; field survey reports; ASCII break and spot point files; and CD-ROMs containing digital plan and contours in Micro Station output file format and digital ortho corrected imagery in .TIF output file format. The photogrammetric mapping provided under this contract will meet or exceed accuracy requirements as stated in FEMA Guidelines and Specifications for Flood Hazard Mapping Partners.