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Co-ordinate System [South African]

Linda Maseko
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Hello

I have user on OpenCities Map who has enquired about South African co-ordinte system in OpenCIties,

to quote "After assigning any co-ordinate system (and projection) from the Library - while capturing co-ordinates one notices, that X increases in value towards the North and  +Y towards East."

I do recall we had some work around in Bentley Map but I have not touched the software in 11 years, it appears the projected coordinates in OpenCities is not as it should be.

Please let me know if I can provide more information

 

Parents
  • 0 Offline
    Hello,
    thank you for your reply. I will try and follow your recommendations.
    Would like to add that in South Africa we have to work according to survey regulations; our data is distributed to Land Surveyors and has to be accurate and in official format (Y co-ordinate being East-West and X co-ordinate always positive to the South). View changing  will not yield  required results, nor will enable capturing of historical documents with distance and direction data only (no co-ordinates).
    The file, which I have sent to you has been captured using correct seed file (from old Geographics). My point is thus:
    I should be able to use generic 2D seed OC file, assign co-ordinate system (and projection) from provided library and have correct results (and be able to add to the file historical information with distance and direction only – this we do using appropriate angle readout).  Additionally,  datums conversions should yield correct results.
    Kind regards
    Bronia
    DWS
     
Reply
  • 0 Offline
    Hello,
    thank you for your reply. I will try and follow your recommendations.
    Would like to add that in South Africa we have to work according to survey regulations; our data is distributed to Land Surveyors and has to be accurate and in official format (Y co-ordinate being East-West and X co-ordinate always positive to the South). View changing  will not yield  required results, nor will enable capturing of historical documents with distance and direction data only (no co-ordinates).
    The file, which I have sent to you has been captured using correct seed file (from old Geographics). My point is thus:
    I should be able to use generic 2D seed OC file, assign co-ordinate system (and projection) from provided library and have correct results (and be able to add to the file historical information with distance and direction only – this we do using appropriate angle readout).  Additionally,  datums conversions should yield correct results.
    Kind regards
    Bronia
    DWS
     
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