Is there anyway in QGIS that I can select all the outermost features on a map? On an island that would be all that have a coastline.

edit: This is what I'm trying to select: enter image description here

  • 2
    Could you elaborate a bit? And preferably add an illustration to show what you want to achieve.
    – Martin
    Jun 23, 2014 at 10:07
  • 1
    I don't know a lot about Qgis, but in Arcmap I would create a large polygon enclosing all your features. Then I'd use Erase to create holes in that polygon where your features are. Finally I'd select those of your features that share a border with the enclosing polygon, which now is not overlapping your features, with Select by location and Boundary touches as argument.
    – Martin
    Jun 23, 2014 at 13:10

1 Answer 1

  1. Create a copy of your polygon file. Start editing and use Merge selected features (Advanced digitizing toolbar) to create one polygon (sorry, I do not have an English QGIS so menu names may vary). enter image description here

  2. Convert polygon (from step 1) to line using Vector > Geometry Tools > Polygon to Line

  3. Use Vector > Spatial Query to select all parcels which intersects line file. enter image description here

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