setting the resolution (dpi) before importing geopdf files

DanielG
DanielG
in GM Script Language
Hi,

is it possible to set the resolution (dpi value) for geopdf import like doing the import with the gui? 
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Answers

  • bmg_bob
    bmg_bob Global Mapper Programmer
    Hello,

    The easiest way to set up an IMPORT command is to load a file into Global Mapper using the GUI, then save a workspace. A workspace is a script file, so you can open it in a text editor and look at the IMPORT command that gets generated. 

    The DPI used to import a PDF is in the LOAD_FLAGS parameter. This parameter takes a comma-separated list of values, and DPI is the second one. The first value is the frame index in the PDF, and you can use -1 to get all of them. Using
    LOAD_FLAGS="-1,200"
    will read an image from the PDF with a DPI of 200.

    Cheers,
    Bob
  • DanielG
    DanielG
    Hello,

    the import doesn't work as I expect.

    If I load the PDF with a DPI of 75
    IMPORT FILENAME="V:\sample.pdf" FORMAT="PDF" LOAD_FLAGS="-1,75" SAMPLING_METHOD=BICUBIC PROJ="redLS150"

    and I check the metadata for this layer the Render_DPI value has a value of 250. This was the setting of the last gui run.

    Any idea what is going wrong with? I'm still using Global Mapper V21.0.

    Cheers,
    Daniel


  • DanielG
    DanielG
    Hello,

    I think it is not allowed to shorten the LOAD_FLAGS parameter. If I try
    LOAD_FLAGS="-1,150,,1,2"
    to render my PDF with 150 dpi my import script works well.

    Cheers,
    Daniel


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