[Qgis-user] How to select records that are not on land

[Woolard, Zachary S.]

Try selecting all of the species that fall within the land polygon by
using the Select by Location tool under Tools>Research Tools.  Then open
the attribute table for the species and click on the Invert Selection
button at the lower left. That will flip the selection to select species
that are not on land.

 

Zach

 

________________________________

From: qgis-user-bounces at lists.osgeo.org
[mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of M.E.Dodd
Sent: Tuesday, January 05, 2010 11:26 AM
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] How to select records that are not on land

 

I have been trying for months to find a way of selecting the records of
a land based species that have accidentally been recorded in the sea
i.e. not on one of the land polygons.  I've tried qgis and mapinfo and
not been able to find a way of selecting records that are NOT on the
land.  Have tried adding a sea layer but both mapinfo and qgis crash
(out of memory) when trying to cookie cut this to produce a sea only
polygon.  The very annoying thing is that I did manage to do this once
so know it is possible but just can't remember how and I've not been
able to find any documentation that would help.

The records are scattered worldwide although only really interested in
Europe, the vector basemap covers the whole world and the 'ocean' also
covers the whole world.

 

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