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I'm new to QGIS. I opened a few shapefiles that cover Europe. Now I want to select a smaller area and if possible copy the polygons in this area so I can work with a smaller set. How should I do this in QGIS?

I started to choose "toogle to editing", then I choosed the "node tool" and started to make rectangle. But then I get a popup (see screenshot below) telling me to set a "tolerance".

I looked in (as suggested in the popup) "Settings" > "Project properties" > "General", but couldn't find and any tolerance value here.

From the User Guide (version 1.7.0) in chapter 4.5.1 it was suggested that I should change the tolerance in "Settings" > "Options" > "Digitizing" and I changed from 0.00000 to 1.00000. It was also suggested to edit "Settings" > "Snapping options" so I changed the tolerance to the same value there.

Now I tried with the "Node tool" again, but I got the same popup and couldn't select any polygons.

How can I select an area of polygons in QGIS? that I later can copy to a new project in QGIS to get a smaller set to work with.

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up vote 5 down vote accepted

The select tool has a "Select by Rectangle" option. (There are also freehand/polygon options if that would be more appropriate.)

enter image description here

The node tool is for digitizing. I don't think that's what you want to do here.

Then, right-click on the layer in layer list and use "Save selection as ...". This will create a new file with the features you selected. (You can chose from many different formats.) Afterwards, load the file into the same old or a new project.

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