QGIS/resources/context_help/QgsGenericProjectionSelector

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2015-08-12 17:17:27 -07:00
<h3>Coordinate Reference System Selector</h3>
<p>
The Coordinate Reference System Selector allows you to set the projection for
the current layer.
</p>
<p>
You can find a coordinate system by entering its name, EPSG code or the QGIS ID
and clicking the <label>Find</label> button. The list of recently used
coordinate systems will be available on the bottom for quick access.
</p>
<p>
When operating across layers, for example, computing intersections between
two layers, it is important that both layers have the same CRS. To change the
projection of an existing layer, it is insufficient to simply change the CRS
in that layer's properties. Instead you must save the layer as a new layer,
and choose the desired CRS for the new layer.
</p>