Nicolai Jørgensen February 2016

how do I find and split polygons in QGIS

I have this shapefile containing what looks like polygons but the attribute table only contain a "level" column.

How would I fine the area of each of the polygons and add that to the attribute table?

Example files: https://www.dropbox.com/sh/mgcppedd5kvb268/AABmFCXaG39IEV4hV_q2QchPa?dl=0

Answers


luca76 February 2016

You could use the field calculator. See this help page:

http://docs.qgis.org/2.8/en/docs/user_manual/working_with_vector/field_calculator.html

All you do is to open the Attribute Table of the shapefile, from there enable the editing mode, open the calculator, add a field and use the $area variable in the expression list.


Addendum: You have to split one multipolygon to many polygons.

Do do it, go to menu

Vector -> Geometry Tools -> Multipart to singleparts

with it, you create a new shapefile with many polygons inside. Then you can calculate the area in the attribute table, as said before.

Post Status

Asked in February 2016
Viewed 1,749 times
Voted 10
Answered 1 times

Search




Leave an answer