adjust rows and columns

Peter VersteegPeter Versteeg Global Mapper UserPosts: 1
edited July 2014 in Technical Support
I have a geotiff and that's needs to by a specific resolution.
columns 65536 and rows 32768. In the export raster window i set geotif and in the tilling tab i set the rows and columns. When i try a export i get a error

"unexpected exception processing command message 32793 with code 0"

Can anyone help my with this problem?

greetings Peter

Comments

  • DMcKittrickDMcKittrick Global Mapper Trainer Posts: 58Trusted User
    edited July 2014
    Peter,

    The Tiling tab in the Export Options dialog box is not used for establishing the resolution of the exported file. This tool is typically used to create multiple image files in a regular array from a single image. To specify the resolution parameters, click the GeoTIFF Options tab and enter the appropriate values in the Sample Spacing/Scale fields.

    David McKittrick
    Senior Applications Specialist
    Blue Marble Geographics
  • JeffH@BMGJeffH@BMG Global Mapper Developer Posts: 322Trusted User
    edited July 2014
    Hi Peter,

    By selecting Tiling for your export, what you're actually doing is specifying an export to a tiled set of GeoTIFF files; in your case, that's 65536 rows and 32768 columns, corresponding to over 4 billion generated files files (65536 * 32768). I'm pretty sure that that's not quite what you want.

    Are you trying to export to specific GeoTIFF dimensions of 65536x32768? I don't think that Global Mapper allows you to do that directly, but you should be able to approximate that by manipulating the DPI value and Export at Fixed Scale setting, and your export bounds to get those dimensions. If you really need that exact resolution, you could also make use of a 3rd-party image editor to rescale your generated image.

    ~Jeff

    ​Edit: David beat me to it!
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