[OSGeo Africa] Identify coordinate system

[Hermanus Brynard]

Zoltan
You mention 500k makes me think there could be a UTM transformation which
usully adds a 500000m easting or westing and 10 000 000m northing to avoid
negative numbers.

Can you send me the shapefile.
Manie


On Fri, Jul 12, 2019 at 8:57 AM Zoltan Szecsei <zoltans at geograph.co.za>
wrote:

> Hi Manie,
> Thanks for the idea.
>
> The current system in use is QND95 - the one you are suggesting  (I see)
> is from 1976, and its origin is "too close".
> (Yes, I still tried it)
>
> Looking at the numeric values of the coords, I am expecting something with
> an origin some 500Km West of Doha, and on the Equator.
>
> And then of course I also need to consider the possibility that the coords
> in the shapefile are non-sensical, so I'm trying to find out its
> source....
>
>
> Thanks and keep well,
> Zoltan
>
> On 2019/07/12 09:23, Hermanus Brynard wrote:
>
> Zoltan
> Have you tired the
>
> Quatar National Grid <https://epsg.io/28600>
> EPSG:28600 <https://epsg.io/28600>
>
> Manie Brynard
>
> On Thu, Jul 11, 2019 at 6:33 PM Zoltan Szecsei <zoltans at geograph.co.za>
> wrote:
>
>> Hi Listers,
>> I've been asked o help a school-going daughter of a friend of mine in
>> Doha (yes, this is "AfricaList" :-/  )
>> She has been given a shapefile without a projection file. The area is Al
>> Wakrah, just South of Doha airport.
>>
>> The numeric values of the geometry coords are around 560000, 2782000 -
>> the second value looked like a distance from the Equator, so I tried UTM 39N
>> The scaling seems wrong, and it does not align with the coastline (QND95)
>> shapefile I have.
>> (I also tried EPSG:27039)
>>
>>
>> As you can see, projection-sleuthing is not one of my strengths.
>> Can anyone point me in a direction to try and solve this?
>>
>> Thanks in advance.
>>
>> Kind regards,
>> Zoltan
>>
>>
>> --
>>
>> =============================================
>> Zoltan Szecsei GPrGISc 0031
>> Geograph (Pty) Ltd.
>> GIS and Photogrammetric Services
>>
>> P.O. Box 7, Muizenberg 7950, South Africa.
>>
>> Mobile: +27-83-6004028
>> Qatar:  +974 5083 2722     www.geograph.co.za
>> =============================================
>>
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>
>
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> --
>
> =============================================
> Zoltan Szecsei GPrGISc 0031
> Geograph (Pty) Ltd.
> GIS and Photogrammetric Services
>
> P.O. Box 7, Muizenberg 7950, South Africa.
>
> Mobile: +27-83-6004028
> Qatar:  +974 5083 2722     www.geograph.co.za
> =============================================
>
> _______________________________________________
> Africa mailing list
> Africa at lists.osgeo.org
> You can UNSUBSCRIBE at https://lists.osgeo.org/mailman/listinfo/africa
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