I receive this message: Digitizing Tools: Amend Line is disabled because layer CRS and project CRS do not match.

If I set the CRS of the layer the same as the project CRS (W84 Pseudo Mercator) is misaligned and in a unknown location.

My project is EPSG: 3857 / WGS 84 / Pseudo Mercator

First layer is a Bing Aerial (Web > OpenLayersPlugin > BingMaps > Bing Aerial) - CRS: EPSG 3857 / WGS 84 / Pseudo Mercator

Another layers with shapefiles lines and points captured from OSM. - CRS: ESPG 4326 / WGS84, which is OK on top the base layer.

About the error: the layer in question is a shapefile line layer (roads) - CRS: ESPG 4326 / WGS84, which is OK on top the base layer.

3 Answers 3


The Digitizing tool does not work correctly with on-the-fly reprojection.

If you need the project CRS to be EPSG:3857, reproject the shapefiles layers using Save As ... to another filename and EPSG:3857, and remove the original layers from the project. Then you can use the digitizing tool without error messages.

Once finished with digitzing, you can save back to EPSG:4326.

DON'T USE Set Layer CRS to reproject, it will corrupt your data.


You should change you project CRS to match that of the layer you are editing, and not the Layer's CRS from it's properties menu, as that is simply incorrect.

  • When I set the project CRS to macth (right button > Set Preject CRS from layer) the layer is slightly misaligned. May 7, 2016 at 15:48
  • what is your editing layer's CRS? what layers are you using as reference on your base map?
    – HDunn
    May 7, 2016 at 15:49
  • Pls see in the question above my project... May 8, 2016 at 14:02

In a new project the tool works fine. It has no Bing layers.The CRS is the same for all layers and project.

  • If you use the QuickmapServices plugin, you can still have Bing layers, and project CRS set to EPSG:4326.
    – AndreJ
    May 26, 2016 at 18:16
  • But by the experience I made it seems that we can not use Pseudo Mercator. It's the only difference I see, or perhaps what @HDunn mentioned above. May 27, 2016 at 11:33
  • With QMS, you can add Bing layers in layer CRS EPSG:3857 to your new project without the need to change the project CRS to it too.
    – AndreJ
    May 27, 2016 at 16:29

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