Converting polygon into single or all points in QGIS

Question

I want to convert polygons into points using QGIS.

I know how it's done in ArcGIS Desktop.

How can I implement it using QGIS?

Do you mean convert the polygon borders into points or just reduce it to a point (get centroids)? — R.K., Apr 30 '12 at 14:35

score 36 · Accepted Answer · edited Jul 27 '21 at 05:38

36

You can do the "Centroids" in QGIS using:

Vector > Geometry Tools > Centroids

edited Jul 27 '21 at 05:38

Taras

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answered Apr 30 '12 at 14:43

urcm

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Aragon, i didn't make it! i have 2 polygon and after using the tool i got only 2 point in the center of the polygon. i want point in the perimeter of the polygons.how do i do it with qgis? – newGIS Jan 14 '15 at 08:37
Check gene answer below. – Alexandre Neto Jan 14 '15 at 14:54

score 25 · Answer 2 · edited Jul 27 '21 at 05:41

25

You can "Extract Vertices" in QGIS using:

Vector > Geometry Tools > Extract Vertices

There is also a tool called "Extract specific vertices"

edited Jul 27 '21 at 05:41

Taras

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answered Apr 30 '12 at 17:10

gene

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score 1 · Answer 3 · edited Jul 27 '21 at 05:45

If you want to decide on your own point spacing, you can use the Sextante Toolbox with SAGA functionality activated (you'll need to install SAGA - http://www.saga-gis.org/en/index.html - and specify the installation path in sextante).

Use the "Polygons to Lines" geoalgoritm followed by the "Lines to Points" one. You can create a model in sextante that combines these into one step as well.

Note: you have to make sure you install the right version of SAGA - I think its 2.0.8

score 0 · Answer 4 · answered Jul 15 '21 at 10:00

0

Export polygon ;ayer to SHP Open with CloudCompare Edit -->polyline-->sample points save resilt vertices as csv . Import with QGIS (add layer--> delimited text layer)

answered Jul 15 '21 at 10:00

DA53

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score -3 · Answer 5 · answered Dec 26 '18 at 19:44

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If you want to convert polygon to point using QGIS. Then use
Vector > Analysis Tools > Mean Coordinate.

answered Dec 26 '18 at 19:44

Atul Nandeshwar

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Pay attention to that this algorithm computes a point layer with the center of mass of geometries in an input layer. – Taras Jul 27 '21 at 05:48

Converting polygon into single or all points in QGIS

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