Export 1/3 aec second mhw dem points

bse1963bse1963 Global Mapper UserPosts: 1
edited December 2011 in Vector Data
Hi,



http://www.ngdc.noaa.gov/dem/squareCellGrid/getArchive/677?gridFormat=ESRI+Arc+ASCII

I am using GM 12 and when i try to export the points of a small area in either DXF of XYZ and load the them into Autocad it is not a 10x10 grid that i would have expected using a 10 meter grid map.

How can i get a straight output of the original file?

Comments

  • global_mapperglobal_mapper Administrator Posts: 17,238
    edited December 2011
    The original NED 1/3rd data is likely natively in the Geographic (lat/lon) projection, so while the spacing is approximately 10 meters, it is not exact and will vary with latitude. If you set your projection to UTM on the Projection tab of the Configuration dialog prior to export you could then specify the export spacing in metes and get it resampled to exactly 10m in each direction.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.globalmapper.com
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