Global Mapper v25.0

Cropping not working as I'd expect.

steve_n_ottawa
steve_n_ottawa Global Mapper UserTrusted User
edited February 2013 in Technical Support
If I load several GeoPdf files from the USGS site that are adjacent, and then select Auto Crop Collar I get what I'd expect....Collarless adjacent maps. But if I then draw a polygon on thos maps and then Crop to Selected Polygon...the Collars come back!
Is there a way to prevent this? I would expect sucsessive cropping to crop from what I see...not start from the beginning.
Thanks.
-Steve

Comments

  • global_mapper
    global_mapper Administrator
    edited February 2013
    Steve,

    Each layer can only have a single crop boundary activate at a time. So you can crop off the collars, or crop to a polygon, but not both at once from that interface. What you can do instead is crop the collars off, then do an export cropped to the polygon of interest. That will use the collar crop for the layer and then apply the additional crop polygon on export.

    Note that the crops don't modify the original data or anything in memory, the pixels are just checked against the crop polygon as you render.

    Thanks,

    Mike
    Global Mapper Guru
    gmsupport@bluemarblegeo.com
    http://www.bluemarblegeo.com/
  • steve_n_ottawa
    steve_n_ottawa Global Mapper User Trusted User
    edited February 2013
    OK.....cropping as you suggest works perfect. Thanks again!
    -Steve