Thx for explaining this ..
So I'd suggest to make other than degrees as the default unit in qgis -
and I'm also with Andreas to issue a warning when loading data outside
the range.
Should I file it as a bug?
thx again for helping me out
regards
Werner
Werner Macho skrev:
Hi again!
Ok I must miss something somewhere..
I open QGIS .. Set the project projection to M34.
Load the shape file as a vector layer - set the Layer projection to
M34 (missed that before) .. but .. the same happens
Project has +proj=tmerc +lat_0=0 +lon_0=16.33333333333333 +k=1
+x_0=750000 +y_0=0 +ellps=bessel
+towgs84=577.326,90.129,463.919,5.137,1.474,5.297,2.4232 +units=m
+no_defs
Layer CRS is +proj=tmerc +lat_0=0 +lon_0=16.33333333333333 +k=1
+x_0=750000 +y_0=0 +ellps=bessel
+towgs84=577.326,90.129,463.919,5.137,1.474,5.297,2.4232 +units=m
+no_defs
Beat me but where can i find the "coordinate transformation turned
on?" switch?
The last part is the key to the entire mystery! :-)
When you install QGIS, degrees is the default unit, and it tells QGIS
that any coordinate in your layer is in degrees. As you have large
>>360 values of coordinates, the scale calculation breaks down.
Calculating scale is done by projecting coordinates sin the center of
the canvas
to an ellipsoid. Hairy stuff. This projection is not reliable with
unrealistic values. Remember QGIs thinks that your coordinate (6848,
272169) is in degrees.
Now, you can either change this to meter manually in the option dialog
OR you can turn on projection (top left corner in dialog where you
select project CRS in project properties). In the last case, the unit
is set to what the project projection ("+units=m") says.
Hope this explains it all.
magnus
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