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Making part of lines layer transparent based on circle

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Making part of lines layer transparent based on circle

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3

I have lines from a centerpoint going outwards at 10 degree intervals. I want to make the inner portion within the black circle of those lines transparent (25%). How can I do this?

qgis symbology

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edited 5 hours ago

MrXsquared

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asked 8 hours ago

SSR2000SSR2000

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SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How are your data structured ? Do u have an ID for each line ?
  
  – snaileater
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  hello, each line was on a different layer, i combined them all in 1 layer. can i add an ID using the attribute Table?
  
  – SSR2000
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Could inner segments be detached from the outer ones?
  
  – Rodrigo Vargas
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  no they are lines from the center point outwards for a fixed distance, all of them.
  
  – SSR2000
  5 hours ago
  

  
  
  
  

add a comment
 | 

3

I have lines from a centerpoint going outwards at 10 degree intervals. I want to make the inner portion within the black circle of those lines transparent (25%). How can I do this?

qgis symbology

share|improve this question

edited 5 hours ago

MrXsquared

3,92411 gold badge1212 silver badges2626 bronze badges

asked 8 hours ago

SSR2000SSR2000

1622 bronze badges

New contributor

SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  How are your data structured ? Do u have an ID for each line ?
  
  – snaileater
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  hello, each line was on a different layer, i combined them all in 1 layer. can i add an ID using the attribute Table?
  
  – SSR2000
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Could inner segments be detached from the outer ones?
  
  – Rodrigo Vargas
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  no they are lines from the center point outwards for a fixed distance, all of them.
  
  – SSR2000
  5 hours ago
  

  
  
  
  

add a comment
 | 

I have lines from a centerpoint going outwards at 10 degree intervals. I want to make the inner portion within the black circle of those lines transparent (25%). How can I do this?

qgis symbology

share|improve this question

edited 5 hours ago

MrXsquared

3,92411 gold badge1212 silver badges2626 bronze badges

asked 8 hours ago

SSR2000SSR2000

1622 bronze badges

New contributor

SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 5 hours ago

MrXsquared

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asked 8 hours ago

SSR2000SSR2000

1622 bronze badges

New contributor

SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 5 hours ago

MrXsquared

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asked 8 hours ago

SSR2000SSR2000

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SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 5 hours ago

MrXsquared

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edited 5 hours ago

MrXsquared

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asked 8 hours ago

SSR2000SSR2000

1622 bronze badges

New contributor

SSR2000 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 8 hours ago

SSR2000SSR2000

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1 Answer
1

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2

I would try layered Geometry generator lines for this.

Open the layer properties of your line layer (radial_spokes in this example) and create two stacked Geometry generators (by hitting green 'plus' button at the upper right corner).

(1) Make the first geometry generator layer for lines Within the circle by:

intersection($geometry, geometry(get_feature_by_id('circle', 1)))

(
if the layername of your circle is 'circle' and your circle has an id = 1).

(2) Then set opacity (transparency) to 25% (or 75%?) for this part.

(3) Next, make the second geometry generator for lines outside of the circle by:

difference($geometry, geometry(get_feature_by_id('circle', 1)))

(The color for the lines outside of the circle is kept unchanged).

share|improve this answer

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  hi, thanks for your answer, this created a new black colored layer on top of it. i must add the circle is a polygon with fill set to full transparent and the border is visible, that is what is creating the circle. the spokes were each on 1 different line layer, i managed to merge the spoke lines into 1 layer. but i cannot merge the circle and the lines layers.
  
  – SSR2000
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Can you add an image to explain what is happening? As you see it on my example, the lines and circle layers are separated. You do not have to merge them.
  
  – Kazuhito
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Have you changed the syntax to fit your data? For instance 'circle' should be the layername of your circle.
  
  – Kazuhito
  4 hours ago
  
  

  
  
  
  

add a comment
 | 

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2

I would try layered Geometry generator lines for this.

Open the layer properties of your line layer (radial_spokes in this example) and create two stacked Geometry generators (by hitting green 'plus' button at the upper right corner).

(1) Make the first geometry generator layer for lines Within the circle by:

intersection($geometry, geometry(get_feature_by_id('circle', 1)))

(
if the layername of your circle is 'circle' and your circle has an id = 1).

(2) Then set opacity (transparency) to 25% (or 75%?) for this part.

(3) Next, make the second geometry generator for lines outside of the circle by:

difference($geometry, geometry(get_feature_by_id('circle', 1)))

(The color for the lines outside of the circle is kept unchanged).

share|improve this answer

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  hi, thanks for your answer, this created a new black colored layer on top of it. i must add the circle is a polygon with fill set to full transparent and the border is visible, that is what is creating the circle. the spokes were each on 1 different line layer, i managed to merge the spoke lines into 1 layer. but i cannot merge the circle and the lines layers.
  
  – SSR2000
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Can you add an image to explain what is happening? As you see it on my example, the lines and circle layers are separated. You do not have to merge them.
  
  – Kazuhito
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Have you changed the syntax to fit your data? For instance 'circle' should be the layername of your circle.
  
  – Kazuhito
  4 hours ago
  
  

  
  
  
  

add a comment
 | 

2

I would try layered Geometry generator lines for this.

Open the layer properties of your line layer (radial_spokes in this example) and create two stacked Geometry generators (by hitting green 'plus' button at the upper right corner).

(1) Make the first geometry generator layer for lines Within the circle by:

intersection($geometry, geometry(get_feature_by_id('circle', 1)))

(
if the layername of your circle is 'circle' and your circle has an id = 1).

(2) Then set opacity (transparency) to 25% (or 75%?) for this part.

(3) Next, make the second geometry generator for lines outside of the circle by:

difference($geometry, geometry(get_feature_by_id('circle', 1)))

(The color for the lines outside of the circle is kept unchanged).

share|improve this answer

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  hi, thanks for your answer, this created a new black colored layer on top of it. i must add the circle is a polygon with fill set to full transparent and the border is visible, that is what is creating the circle. the spokes were each on 1 different line layer, i managed to merge the spoke lines into 1 layer. but i cannot merge the circle and the lines layers.
  
  – SSR2000
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Can you add an image to explain what is happening? As you see it on my example, the lines and circle layers are separated. You do not have to merge them.
  
  – Kazuhito
  4 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @SSR2000 Have you changed the syntax to fit your data? For instance 'circle' should be the layername of your circle.
  
  – Kazuhito
  4 hours ago
  
  

  
  
  
  

add a comment
 | 

I would try layered Geometry generator lines for this.

Open the layer properties of your line layer (radial_spokes in this example) and create two stacked Geometry generators (by hitting green 'plus' button at the upper right corner).

(1) Make the first geometry generator layer for lines Within the circle by:

intersection($geometry, geometry(get_feature_by_id('circle', 1)))

(
if the layername of your circle is 'circle' and your circle has an id = 1).

(2) Then set opacity (transparency) to 25% (or 75%?) for this part.

(3) Next, make the second geometry generator for lines outside of the circle by:

difference($geometry, geometry(get_feature_by_id('circle', 1)))

(The color for the lines outside of the circle is kept unchanged).

share|improve this answer

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

intersection($geometry, geometry(get_feature_by_id('circle', 1)))

difference($geometry, geometry(get_feature_by_id('circle', 1)))

share|improve this answer

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges

answered 5 hours ago

KazuhitoKazuhito

18.5k44 gold badges2626 silver badges9595 bronze badges