[GRASS-user] Identification of projectiopn?

[Daniel Lee]

That really is a guessing game, because even if someone finds the
coordinates that the map could fit into, it still doesn't mean that they're
correct. Do you have a reason to think that the datum is WGS84? I think
South Africa probably uses a more accurate regional datum for local maps -
that makes a lot more sense unless you're working directly with web mapping
applications or you want to use GPS data directly.

Isn't there any metadata provided with the shapefiles? I didn't know that it
was possible to have a shapefile without any kind of spatial reference
stored in the metadata. You could try making a location based on the
shapefile as a georeferenced file.

Best,
Daniel

--
B.Sc. Daniel Lee
Geschäftsführung für Forschung und Entwicklung
ISIS - International Solar Information Solutions

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Am 05.07.2011 12:59 schrieb "Rainer M Krug" <r.m.krug at gmail.com>:
> Hi
>
> I have two shape files of which I do not know the projection (and it seems
> that the person I got them from does not know either...). The maps are
from
> the Keurboom nature reserve area in South Africa (
> http://plak.co.za/moreinfo.php?id=347) and the two shp files have the
> folowing bounding boxes:
>
>
> In layer spatial reference system units : xMin,yMin 21340.4,-3755528.75 :
> xMax,yMax 34244.9,-3749187.87
>
> In layer spatial reference system units : xMin,yMin 17001.2,-3754438.15 :
> xMax,yMax 37019.9,-3743929.77
>
>
> I know this is a guessing game, but it must be a common projection - the
map
> datum is very likely (almost certainly) WGS84.
>
>
> Any suggestions welcome,
>
>
> Rainer
>
>
> --
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology,
> UCT), Dipl. Phys. (Germany)
>
> Centre of Excellence for Invasion Biology
> Stellenbosch University
> South Africa
>
> Tel : +33 - (0)9 53 10 27 44
> Cell: +33 - (0)6 85 62 59 98
> Fax (F): +33 - (0)9 58 10 27 44
>
> Fax (D): +49 - (0)3 21 21 25 22 44
>
> email: Rainer at krugs.de
>
> Skype: RMkrug
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