October 11, 200619 yr Author Commercial Member Hi Derek,good thinking. Indeed, satellite imagery can be and has been used extensively to do just that. In particular, the near-infrared band of the Landsat TM data is nicely suited for this task because water shows up in high contrast to land surfaces.In fact, the recent merging of Shuttle Radar elevation data with Water Body polygons is based on this method - http://edc.usgs.gov/products/elevation/swbd.html - and the separately available shape files - ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SWBD/ - offer one of the options to enhance the areas with poor shoreline resolution in FSX. For a "home-grown" FS method the documentation for Jim Keir's Slartibartfast tool - http://www.jimkeir.co.uk/FlightSim/index.html - describes how to use Landsat data to extract shorelines. For my own projects I mostly use topographic maps or existing GIS files as source data but for one of the smaller ones - http://library.avsim.net/esearch.php?CatID...scen&DLID=47993 - I used Jim's Landsat/Slartibartfast approach with good success.Cheers, Holger
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