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QGIS Polygon Selection

Summing attribute values for areas where multiple polygons overlap using QGIS?2D point cloud to polygonCentroid coordinates for odd-shaped polygonsQGIS object selecting if any segment length is longer thanQGIS - select or export point attributes by polygon featurePolygon to polyline conversionSelection feature acting weird on queried layer in QGISProcessing tool to fill all voids within a lines layerSelecting connected lines between start and end point in QGIS?Can only select certain polygons

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1

I want to select a polygon using QGIS. The polygon is only represented via it's boundaries (I chose not to fill the area in order to highlight the problem). Why are not all lines that surround the polygon selected? See picture below. A similar problem occurs when two polygons overlap: only one polygon is highlighted.

qgis polygon select

share|improve this question

edited Mar 27 at 13:34

kalakaru

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are those blue lines actuylly polygons as well or just lines?
  
  – HimBromBeere
  Mar 27 at 13:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  they are polygons. The area colour is inivisble (no fill).
  
  – kalakaru
  Mar 27 at 13:32
  
  

  
  
  
  

add a comment | 

1

I want to select a polygon using QGIS. The polygon is only represented via it's boundaries (I chose not to fill the area in order to highlight the problem). Why are not all lines that surround the polygon selected? See picture below. A similar problem occurs when two polygons overlap: only one polygon is highlighted.

qgis polygon select

share|improve this question

edited Mar 27 at 13:34

kalakaru

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are those blue lines actuylly polygons as well or just lines?
  
  – HimBromBeere
  Mar 27 at 13:25
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  they are polygons. The area colour is inivisble (no fill).
  
  – kalakaru
  Mar 27 at 13:32
  
  

  
  
  
  

add a comment | 

I want to select a polygon using QGIS. The polygon is only represented via it's boundaries (I chose not to fill the area in order to highlight the problem). Why are not all lines that surround the polygon selected? See picture below. A similar problem occurs when two polygons overlap: only one polygon is highlighted.

qgis polygon select

share|improve this question

edited Mar 27 at 13:34

kalakaru

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

share|improve this question

edited Mar 27 at 13:34

kalakaru

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

share|improve this question

edited Mar 27 at 13:34

kalakaru

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

asked Mar 27 at 13:18

kalakarukalakaru

1681111 bronze badges

2 Answers
2

active

oldest

votes

3

This is due to the drawing order of your polygon. The other ones are probably drawn after the selected one. The last drawn is rendered on top of the others. That's why the border of the selected one is partialy hidden

share|improve this answer

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is there a way I can change the order of the polygons? Because polygons underneath a polygon are for example hidden.
  
  – kalakaru
  Mar 27 at 13:31
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  @kalakaru Yes. In Symbology Tab there is a small text saying "Layer Rendering" at the bottom. Open it and now check the box next to "Control feature rendering order". Now you can click the box with the "AZ and Arrow" Symbol and choose an attribute that controls the rendering order.
  
  – MrXsquared
  Mar 27 at 13:34
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you set your fill as semi-transparant, the polygons underneath will show up
  
  – PieterB
  Mar 27 at 13:36
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PieterB that solved my problem. Thank you!! :)
  
  – kalakaru
  Mar 27 at 13:38
  

  
  
  
  

add a comment | 

1

It look like you have a line layer delimiting polygons otherwise the whole area would appear selected (you can check the layer geometry with a right click on the layer name then select property then looking for the information tab and checking the Geometry)

If that's the case you may have information in the attribute table that may let you select whole boundary if not you will have to manually select all the line that limit your area.

If you give us more detail (like how this layer was made or what's in the attribute table) you will get more helpful answers

share|improve this answer

edited Mar 27 at 13:33

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

add a comment | 

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3

This is due to the drawing order of your polygon. The other ones are probably drawn after the selected one. The last drawn is rendered on top of the others. That's why the border of the selected one is partialy hidden

share|improve this answer

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is there a way I can change the order of the polygons? Because polygons underneath a polygon are for example hidden.
  
  – kalakaru
  Mar 27 at 13:31
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  @kalakaru Yes. In Symbology Tab there is a small text saying "Layer Rendering" at the bottom. Open it and now check the box next to "Control feature rendering order". Now you can click the box with the "AZ and Arrow" Symbol and choose an attribute that controls the rendering order.
  
  – MrXsquared
  Mar 27 at 13:34
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you set your fill as semi-transparant, the polygons underneath will show up
  
  – PieterB
  Mar 27 at 13:36
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PieterB that solved my problem. Thank you!! :)
  
  – kalakaru
  Mar 27 at 13:38
  

  
  
  
  

add a comment | 

3

This is due to the drawing order of your polygon. The other ones are probably drawn after the selected one. The last drawn is rendered on top of the others. That's why the border of the selected one is partialy hidden

share|improve this answer

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is there a way I can change the order of the polygons? Because polygons underneath a polygon are for example hidden.
  
  – kalakaru
  Mar 27 at 13:31
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  @kalakaru Yes. In Symbology Tab there is a small text saying "Layer Rendering" at the bottom. Open it and now check the box next to "Control feature rendering order". Now you can click the box with the "AZ and Arrow" Symbol and choose an attribute that controls the rendering order.
  
  – MrXsquared
  Mar 27 at 13:34
  
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  if you set your fill as semi-transparant, the polygons underneath will show up
  
  – PieterB
  Mar 27 at 13:36
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @PieterB that solved my problem. Thank you!! :)
  
  – kalakaru
  Mar 27 at 13:38
  

  
  
  
  

add a comment | 

This is due to the drawing order of your polygon. The other ones are probably drawn after the selected one. The last drawn is rendered on top of the others. That's why the border of the selected one is partialy hidden

share|improve this answer

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

share|improve this answer

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

answered Mar 27 at 13:28

PieterBPieterB

3,3551313 silver badges2929 bronze badges

1

It look like you have a line layer delimiting polygons otherwise the whole area would appear selected (you can check the layer geometry with a right click on the layer name then select property then looking for the information tab and checking the Geometry)

If that's the case you may have information in the attribute table that may let you select whole boundary if not you will have to manually select all the line that limit your area.

If you give us more detail (like how this layer was made or what's in the attribute table) you will get more helpful answers

share|improve this answer

edited Mar 27 at 13:33

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

add a comment | 

1

It look like you have a line layer delimiting polygons otherwise the whole area would appear selected (you can check the layer geometry with a right click on the layer name then select property then looking for the information tab and checking the Geometry)

If that's the case you may have information in the attribute table that may let you select whole boundary if not you will have to manually select all the line that limit your area.

If you give us more detail (like how this layer was made or what's in the attribute table) you will get more helpful answers

share|improve this answer

edited Mar 27 at 13:33

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

add a comment | 

It look like you have a line layer delimiting polygons otherwise the whole area would appear selected (you can check the layer geometry with a right click on the layer name then select property then looking for the information tab and checking the Geometry)

If that's the case you may have information in the attribute table that may let you select whole boundary if not you will have to manually select all the line that limit your area.

If you give us more detail (like how this layer was made or what's in the attribute table) you will get more helpful answers

share|improve this answer

edited Mar 27 at 13:33

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

share|improve this answer

edited Mar 27 at 13:33

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges

answered Mar 27 at 13:26

J.RJ.R

4,49022 silver badges2323 bronze badges