[Qgis-user] reference raster layers
Neubauer-Michael at gmx.net
Wed Oct 8 15:29:52 EDT 2008
first: When you change the projection (or better "spatial reference system")
in the project properties, it does not change the "spatial reference system"
in the data of your layer. Transforming your data to another "spatial
reference system" would be a more complicated operation.
But the good thing is, that with OTF activated, you do not have to do that and
you can superpone layers in different "spatial reference systems".
So do not wonder that the projection of your layer stays the same, when you
change the projection of the whole project. Changing the projection of the
whole project should only have an effect on the coordinates which are
displayed (right bottom of the screen)
second: UTM is a "projected coordinate system" in contrast to "geographic
coordinate systems". "Geographic coordinate systems" treat the earth like a
sphere and work with degrees. "Projected coordinate systems" project the
spere (ball earth :-) ) on a flat surface and deal with other numbers, which
are defined in each coordinate system differently.
UTM stands for "Universal Transverse Mercator" and you find it at the bottom
of "projected coordinate systems" in QGIS (between "geographic coordinate
systems" and "user defined coordinate systems").
So you have to look for "WGS84 / UTM zone 32N" --> N for northern hemisphere.
So I hope that practical and theoretical information helps... :-)
Let me know if everything works
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