I have some data (points and rasters) that I would like to be able to convert to and from several vertical datums, including MLLW in coastal Florida. I would appreciate it if people could provide some insight into accuracy, pitfalls, requirements, etc. of using available utilities such as VDatum or corpscon. Is one more user-friendly than the other? Are there any others that I should consider? Thanks!
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You might also consider GDAL via OSGeo4W, which has the ability to do vertical datum transformations. I don't think that the OSGeo4W build has grid files for coastal Florida, but they could be developed. Search the GDAL Trac wiki or ask on the gdal-dev list for more information on how to develop your own .gtx grid file for coastal Florida. GDAL, of course, has the advantage of being much easier to use than VERTCON, VDatum, or corpscon with the ability to open just about any vector or raster format. |
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I loved Corpscon when I did a lot of datum conversion because it was stand alone and I'm not a programmer. |
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