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Suppose I have layers A and B. I don't know their projections but by the looks of the map I know they are not the same.

In QGIS 1.6 I would use one of my favorite features:

Vector> Data Management Tools> Export to New Projection

What was nice about that feature is that you could export B to A's projection by selecting "choose projection from existing layer". Hence you need not know A or B's projection.

In QGIS 1.7 the Data management Tools menu is much reduced and the Export to New Projection is missing.

Yes, I can do projections on the fly, and I can do save as. The former is not useful if I want to convert B's projection to A's. The latter does not give option to set projection from open layer.

I have tried to find different ways to access the Export to New Projection dialog without success. Any tips?

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"Export to New Projection" has been removed to decrease complexity and necessary maintenance for what was considered a duplicate of "Save as ...". If "choose projection from existing layer" is important to you, maybe file a feature request to add it to "Save as ...". –  underdark Jul 1 '11 at 17:02
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@underdark I can see the need to simplify but I think this was a useful feature. I will try to add a feature request. Right now I fallen back to using QGIS 1.6 for this task. –  Fred Jul 1 '11 at 19:33
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IMHO there is no point in saving a file in a projection that you don't know. –  Pablo Jul 1 '11 at 20:05
    
@Pablo Please see my comment to your answer below. –  Fred Jul 1 '11 at 20:51
    
@Pablo The point is to make them align in some projection so the layer can be saved and read in R. For my purposes I do not care about the projection so long as they are aligned. There is a reason I asked the question I asked. –  Fred Jul 1 '11 at 20:55
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4 Answers 4

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On the basis of answers and responses, I would say the right answer is that provided by underdark:

"Export to New Projection" has been removed to decrease complexity and necessary maintenance for what was considered a duplicate of "Save as ...". If "choose projection from existing layer" is important to you, maybe file a feature request to add it to "Save as ...".

In short, this is no longer possible in QGIS 1.7.

Instead, one would need to:

  1. Find out all your layers' projections and use save as or;
  2. Find out all your layers' projections, learn ogr2ogr, and write a script to export layers or ;
  3. Use QGIS 1.6 to export the layer and then open in QGIS 1.7.

Given that I am no expert in GIS I would choose option 3. (I guess that counts as a minus for QGIS 1.7)

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Since there is no "choose projection from existing layer" you will need to know layer A projection.

1) Find layer A projection. 2) Save As... (layer B) 3) Choose the SRS, after the first use it should be avaliable in "Recently used".

For that you need 5 clicks.

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Thanks. In QGIS 1.6 is 3 clicks and no need to spend time finding projection. My layer A is "nominally" in Lambert Conformal Conic with datum ITRF92 which is not even in the CRS menu (though almost identical to WGS1984). My layer B is from a Garmin eTrex where the datum had been set to WGS1984. When I load both layers they do not overlay at all. BTAIM the point is that in QGIS1.6 I solved this in three clicks and in QGIS1.7 I had to come here, ask questions, and get smart responses. –  Fred Jul 1 '11 at 20:49
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Why don't you have 'Enable 'on the fly' reprojection by default' on? As you don't care for the projection, just set it as WGS84.

The only problem with on-the-fly projections is that many tools (like Vector->Research Tools->Select by Location) won't work.

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First you can set "On-fly" projection" on. After right click on the interested layer, choose "Save as" Here you can select or change the coordinate system you want. Save the layer as a new layer.

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you realize that this question is two years old and for QGIS 1.7 where "Save as" wasn't even existing. Therefore your answer doesn't work for this old version –  Curlew Oct 19 '13 at 9:11
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