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Re: [udig-users] [udig-devel] BeeGIS - GPS Tool - Lon error
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I am not sure where the problem is here; I am not sure how to read
NMEA - where in that string is the Northing / Easting data?
It sounds like the value coming out is just wrong; rather than a CRS
setting. While you could correct for this by messing with the CRS
definition by hand in uDig that is not really a good work around.
Do you have a debugger in order to watch the NMEA data being parsed?
Jody
On 02/07/2009, at 8:21 PM, Ricardo Pinho wrote:
Hi,
I've just installed udig 1.1.1 with BeeGIS& Jgrass plugins. On a
Windows Tablet PC.
Using the GPS Tool, I was also able to connect successfully with a
Bluetooth GPS (L1) .
The problem is that BeeGIS gets the wrong position from GPS (WGS84)!
For example:
Here is the NMEA data received from GPS shown on “GPS Settings”:
$GPGGA,094300.000,4050.282133,N,00828.634375,W,1,8,0.85,211.388,M,
51.205,M,,*4D
$GPRMC,094252.000,A,4050.282134,N,00828.634365,W,
0.009,234.14,020709,,,A*4D
This seems to be the right Gps connection port.
And it shows on the GPS View tab:
Northing = 40.83803583333336
Easting = - 7.8105705333333
That has a incorrect Easting!!!
This reflects on everything done with GPS Tool: Center the map,
automatic gps points, gps data logging, etc.
To my knowledge, based on the NMEA data values, the WGS 84 position
should be:
N = 4050.282133 > N = 40 d 83.80356 s
W = 828.634375 > W = 8 d 47.72396 s
N is correct but W is totally wrong!
I know for sure that my WGS 84 lon position (Easting) is in fact
-8.4772
The uDIG project Map is associated with a CRS = WGS 84 (EPSG=4326)
The line layer properties Projection is the same.
I have also tried several other CRS, and know they influence the
North / Easting shown values.
Please, anyone can give me a clue about how to solve this problem?
Thanks in advance!
Regards,
Ricardo Pinho
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