Author 
Topic 

rezam
New Member
4 Posts 
Posted  07/30/2007 : 04:21:18

Is GaussKruger Projection another name of Transverse Mercator projection?
If no, is it possible to do a converting between them? How? I'm using Datum WGS84 

johan
Forum Admin
Sweden
16169 Posts 
Posted  07/30/2007 : 04:43:18

Yes, GaussKruger Projection is another name for Transverse Mercator projection.
Regards, Johan
Franson Support 


rezam
New Member
4 Posts 
Posted  07/30/2007 : 05:28:18

So,
If I change the Transverse Mercator algorithm to be the GaussKruger algorithm (in WGS84 grids), it will show me the same result, isnt it?
Many Thanks, Reza M 


johan
Forum Admin
Sweden
16169 Posts 
Posted  07/30/2007 : 05:30:19

Transverse Mercator is one projection that uses GaussKruger.
Yes, you should be able to do that. Test and verify the results.
Regards, Johan
Franson Support 


rezam
New Member
4 Posts 
Posted  07/30/2007 : 23:26:47

Another question,
How to convert a coordinate of (for example): UTM Zone 51N (WGS84) to WGS84 GaussKruger
Please also tell me if this question is not relevant.
Thanks, Reza M 


johan
Forum Admin
Sweden
16169 Posts 
Posted  07/31/2007 : 03:15:47

The question is probably not relevant.
Note that "GaussKruger" is a method to do projections from lon/lat (datum) to Easting/Northing (grid), UTM uses Transverse Mercator (which is based on GK).
UTM is a grid, WGS84 is a datum.
I think what you need to do is to play around with CoordTrans, examine the results and compare it to other known values you expect to receive.
Regards, Johan
Franson Support 


rezam
New Member
4 Posts 
Posted  07/31/2007 : 07:17:49

Thanks, Johan. That's what I was thinking, but not sure as I dont have any reference nor someone to share the idea, since I'm not an expert of this.
The problem began when I had a coordinate in China presented like below: Coordinate Using WGS84: 122deg 6.406minute East (41 414 342 m) 30deg 36.37minute North (3 387 652 m)
I assumed the values between the brackets are the UTM coordinate, and I tried to check it. I put the latitudelongitude values above in CoordTrans using datum WGS84, and the eastingnorthing result were: 414 376.43 m 3 386 298.83 m
By using other software I got the same result of easting/northing values.
Just for another check, when I tried to do the vice versa, (as I expected) both softwares showed the coordinate was not even in China. That's why I came with the conclusion that these eastingnorthing values (shown between the brackets above) were incorrect. Do you agree with me?
Many Thanks, Reza M 



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