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Conversion Poland 1992/19 to WGS84 for ArcGIS

stefandewildt
stefandewildt Global Mapper User
edited June 2008 in Projection Questions
Hi,

for a project for Wageningen University, the Netherlands, I have to change the coordinates of measured points of a lake in Poland. These points are projected at this moment in the Poland 1992/19 or "Kronstadt 86" -projection.
I would like to convert these points to the WGS 84-datum with Global Mapper to use them again with the right projection in ArcGIS.
Because this is all new for me, can somebody maybe explain how I can manage this?

Thanks a lot for your help anyway!

Greeting,

Stefan de Wildt
stefan.dewildt@wur.nl
student RiverDeltaManagement
University Van Hall Larenstein
Velp, the Netherlands

Comments

  • PaulTocknell
    PaulTocknell Forum Administrator Unconfirmed
    edited June 2008
    Hi,

    With Global Mapper, that is really easy!

    To start, you need to create a text file with the points so it looks something like this:

    49.3017,-122.2128
    49.1886,-122.0219
    49.0636,-121.8339
    48.9725,-122.0733
    48.9939,-122.2128
    48.9992,-122.3117
    49.0639,-122.4419
    49.1956,-122.4142

    Of course, your points will be in the Poland projection not geographic but hang with me. To import this ASCII file go to file --> Open Generic ASCII file.

    You will then be given a configuration box where you can set up the specifics of the file you are importing. You'll want to make sure you pay attention to coordinate column order. That is very important.

    You will then see your points loaded. To change the projection to WGS-84, you need to use the configuration button located on the toolbar. The icon has a protractor and pencil. Please select the projection tab and select the projection you want to use (you said WGS-84)

    Now all you need to do is export! Select file-->Export Vector Data--->Simple ASCII file.

    Done!

    Let me know if you run into any problems. You can also post some of the points and I might be able to help a little more!

    There is also a tutorial here:

    http://www.globalmapperforum.com/tutorial-1-changing-the-coordinate-system-of-a-project.html
  • stefandewildt
    stefandewildt Global Mapper User
    edited June 2008
    Thanks for you help and quick respond! I get a lot further with your information!

    Only in the configuration-box I get confused, because WGS-84 isn't between the projections, because it is a datum. I believe the projection is UTM. Do I also have to select the zone of the area where I want to make the conversion? I know this is 33 Northern Hemisphere.

    I tried this, but then I lost my points in Global Mapper...maybe I am doing something wrong?

    Then I faced the next problem: I can't export my data, because I use the Trial version of Global Mapper. To purchase the original Global Mapper is too expensive for me as a student, while I only this once will use Global Mapper. Do you have any tips or recommendations to obtain the right data without being forced to purchase the software?

    Thanks again!
  • stefandewildt
    stefandewildt Global Mapper User
    edited June 2008
    Btw, these are some points like they are noted in my text-file created from my ASCII-file:

    Id Easting Northing Height
    0 3664369,76790437000 5564507,82578977000 175,75000000000
    0 3664266,69278677000 5564428,87463586000 172,18000000000
    0 3664115,36974177000 5564400,36449694000 172,20000000000
    0 3664180,06582622000 5564396,34383633000 172,21000000000
    0 3664288,98917745000 5564392,68869031000 173,56000000000
  • global_mapper
    global_mapper Administrator
    edited June 2008
    What you need to do is first load your data file with the File->Open Generic ASCII Data File menu command. Make sure to specify that you need to skip one column of data to reach the coordinate data and also specify that the delimeter is a space/tab character (otherwise the commas may be used as a delimeter). When prompted to select the projection for the file, select the Poland 1992/19 projection and whatever the input datum is (this may already be WGS84).

    You should now have your data loaded into Global Mapper at the correct location. I'm guessing that what you want is to convert the coordinates into lat/lon coordinates on the WGS84 datum. To do this, simply go to the Projection tab of the Configuration dialog and select the Geographic projection and the WGS84 datum. Finally, you can then export your data in this new projection/datum using any of the File->Export Vector menu commands.

    Let me know if I can be of further assistance.

    Thanks,

    Mike
    Global Mapper Support
    support@globalmapper.com
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