How to fix Qatar Datum issue

Hi guys , I have a problem i want to view my cad working (in qnhd) on Google earth but global mapper is not showing QNHD(qatar national height datum) , how to fix this problem??.. thanks

Answers

  • bmg_bobbmg_bob Global Mapper Programmer Posts: 2,025
    Hello,

    What version of Global Mapper are you using?  Where are you looking for QNHD?  
    Global Mapper does not support vertical datum transformation.  You would need to use our Geographic Calculator product for that.  Is that what you are trying to do?  If not, please provide more information about what you are trying to do.

    Cheers,

    Bob
  • m0stafam0stafa Posts: 1
     bmg_bob said:
    Hello,

    What version of Global Mapper are you using?  Where are you looking for QNHD?  
    Global Mapper does not support vertical datum transformation.  You would need to use our Geographic Calculator product for that.  Is that what you are trying to do?  If not, please provide more information about what you are trying to do.

    Cheers,

    Bob
    Hello, I have the same issue also
    the issue is that Qatar is using a projection (TM) and Datum named (QND95/ Qatar Nationa Grid) this datum is not listed in GM and when we use the other old qatar datum cad entities projected in wrong location away from GeoTiff GDEM  
  • MykleMykle Global Mapper User Posts: 446Trusted User
    Global Mapper provides for entering a EPSG code number for data (datums) that are not listed. 


    Search for "Qatar" and for "QND" to list those that have been defined.  I see around ten different dates and descriptions that may be useful. 

    For example, two for Qatar National Grid are:
    EPSG::4614
    EPSG::2932
    Use care which one you use, some are designed for geographic coordinates and others for projected coordinates.  So you need to understand the data that you have to select the appropriate one.  There are others that are designed for older data. 
    Nats
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