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CRS reprojection


I am trying to change the CRS of one shapefile that is originally in NAD27 to WGS84 in Qgis 2.6. When I proceed to make the change, I still continue to see the file in UTM coordinates… I've tried to save the file as a new one with the and change it at the "set layer CRS" option… Do you know another alternative?


NAD27EPSG:4267and WGS84EPSG:4326are both CRS with lat/lon degrees.

The extent of your layer is in a projected CRS, but the projection information does not reflect that.

The most common pitfall in QGIS is to useSet CRS for Layer, which changes the CRS, but not the coordinates. You have to switch that back, or delete the layer and reload the original, thenSave As…to another filename and CRS.

TrySettings -> Options CRStab;Prompt for CRSfor new layers to avoid automatic assignment of wrong default CRS, if the data does not come with projectiuon information.

UTM coordinates can be defined on either NAD27 or WGS84, so you have to be sure which one your data has (unless it is some state plane coordinate system or else).


I think there may be a bug in QGIS save as. This is from QGIS 2.6.0 (Brighton):

The easiest way to export a shapefile to a new coordinate system in QGIS is to right click on the shapefile and select 'save as' then in the dialog select Selected CRS which pops up a dialog and then select the 'to' CRS (in your case WGS84):

Using the method employed in previous versions: set project CRS then export using the project CRS the CRS does not change:

This is probably a new bug in QGIS; this method worked in previous versions (QGIS 2.0.1 Dufour).

After saving the new layer don't forget to change the CRS of the project or it will continue to use a different CRS: Right click on layer then select 'Set Project CRS from Layer' or in project properties from the list of available options.


Watch the video: SNAP - Reprojection (October 2021).