Global Mapper 15
Results 1 to 2 of 2
  1. #1
    Global Mapper User
    Join Date
    Jul 2009
    Posts
    1

    Default how to split geotiff ?

    hi i'm rookie please help me
    i have 1 gb geotiff image, i want to split at least 50 mb each, how?
    and how to make gridline ?

    thank's

  2. #2
    STH
    STH is offline
    Global Mapper User
    Join Date
    Oct 2007
    Location
    Norway
    Posts
    435

    Default

    Here is one suggestion:

    You have to "translate" MB into PIXEL-SIZE, this is how it is done with UNCOMPRESSED TIF.
    For instance an image which is 10 000 x 7 500 pixels and contains RGB = 10000*7500*3 = 225 000 000 = 225 MB

    I assume you want a square file:

    x^2*3 = 50 000 000 x = sqrt (50 000 000 / 3) = 4000 pixels in width and height

    1. Load your GeoTiff in GlobalMapper
    2. File - Export - Raster and Elevation - GeoTIFF
    3. In the Gridding tab - select: Specify Individual Grid Cell Pixel Size: Width: 4000 Height: 4000
    4. Ok.
    5. Select output directory
    Sincerely yours

    Sigbjørn
    Norway

 

 

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.1
Copyright © 2014 vBulletin Solutions, Inc. All rights reserved.
Content Relevant URLs by vBSEO 3.6.1
Copyright 2008-2012 Globalmapperforum.com
All times are GMT. The time now is 11:15 PM.
vBulletin 4.0 skin by CompleteVB