[GRASS-user] Identification of projectiopn?

[lester]

Hi Rainer
I'm not sure where Keurboom nature reserve is, but South Africa uses 
transverse Metacor.  So it probablity one of the following projections, just 
the +lon_0 changes.

+proj=tmerc +lat_0=0 +lon_0=25.00000000000003 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 
+towgs84=0,0,0,0,0,0,0 +units=m +datum=WGS84 +no_defs

+proj=tmerc +lat_0=0 +lon_0=27.00000000000003 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 
+towgs84=0,0,0,0,0,0,0 +units=m +datum=WGS84 +no_defs

+proj=tmerc +lat_0=0 +lon_0=29.00000000000003 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 
+towgs84=0,0,0,0,0,0,0 +units=m +datum=WGS84 +no_defs

+proj=tmerc +lat_0=0 +lon_0=31.00000000000003 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 
+towgs84=0,0,0,0,0,0,0 +units=m +datum=WGS84 +no_defs

Lester

On Tuesday 05 July 2011 12:52:01 Rainer M Krug wrote:
> 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