How do you split a circle polygon into equal quadrants in QGIS?

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How do you split a circle polygon into equal sectors that are 5 degrees in width in QGIS? I have shapefile from a boundary of a field and want to break it into sectors.enter image description here






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    By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
    – csk
    3 hours ago
















up vote
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down vote

favorite












How do you split a circle polygon into equal sectors that are 5 degrees in width in QGIS? I have shapefile from a boundary of a field and want to break it into sectors.enter image description here






qgis







share|improve this question









New contributor




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















  • 1




    By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
    – csk
    3 hours ago












up vote
2
down vote

favorite









up vote
2
down vote

favorite











How do you split a circle polygon into equal sectors that are 5 degrees in width in QGIS? I have shapefile from a boundary of a field and want to break it into sectors.enter image description here






qgis







share|improve this question









New contributor




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











How do you split a circle polygon into equal sectors that are 5 degrees in width in QGIS? I have shapefile from a boundary of a field and want to break it into sectors.enter image description here






qgis




qgis






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







  • 1




    By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
    – csk
    3 hours ago












  • 1




    By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
    – csk
    3 hours ago







1




1




By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
– csk
3 hours ago




By definition, a quadrant is 1/4 of a circle. I wonder if you meant quadrat, which Wikipedia defines as "a frame, traditionally square, used in ecology and geography to isolate a standard unit of area for study of the distribution of an item over a large area." If so, you should keep in mind that, "modern quadrats can for example be rectangular, circular, or irregular." Please edit your question to clarify how you want to divide up your circle. An image showing the desired output would be helpful.
– csk
3 hours ago










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5 degrees is 1/72 of a circle.



  • Use the "Minimum enclosing circles" tool to create a circle with 72 segments.

Circle with 72 vertices



  • Use "Extract Vertices" to turn this circle into 72 points in a layer called Ring.

72 points on a circle



  • Create a layer with a single point at the centre (actually you could do this with the "Centroid" of the circles) called Hub

  • Add an attribute to Ring called d with the value 1 for all points.

  • Add an attribute to Hub called d with the value 1.

  • Use "Join by lines (hub lines)" with the Hub as the hub and Ring as the spokes, use d as the field in both cases so you match each ring point to the centre. Call this layer Spokes.

72 spokes



  • Create a Line version of the circle polygon using "Polygons to Lines" called Rim

A line geometry in a circle



  • Use "Merge Vector Layers" to merge the Spokes with the Rim in a new layer called Wheel.

All the lines we need



  • Use "Polygonize" on Wheel to build 72 polygons of five degree angle in a new layer called Wedges:

Built polygons






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    5 degrees is 1/72 of a circle.



    • Use the "Minimum enclosing circles" tool to create a circle with 72 segments.

    Circle with 72 vertices



    • Use "Extract Vertices" to turn this circle into 72 points in a layer called Ring.

    72 points on a circle



    • Create a layer with a single point at the centre (actually you could do this with the "Centroid" of the circles) called Hub

    • Add an attribute to Ring called d with the value 1 for all points.

    • Add an attribute to Hub called d with the value 1.

    • Use "Join by lines (hub lines)" with the Hub as the hub and Ring as the spokes, use d as the field in both cases so you match each ring point to the centre. Call this layer Spokes.

    72 spokes



    • Create a Line version of the circle polygon using "Polygons to Lines" called Rim

    A line geometry in a circle



    • Use "Merge Vector Layers" to merge the Spokes with the Rim in a new layer called Wheel.

    All the lines we need



    • Use "Polygonize" on Wheel to build 72 polygons of five degree angle in a new layer called Wedges:

    Built polygons






    share|improve this answer


























      up vote
      3
      down vote













      5 degrees is 1/72 of a circle.



      • Use the "Minimum enclosing circles" tool to create a circle with 72 segments.

      Circle with 72 vertices



      • Use "Extract Vertices" to turn this circle into 72 points in a layer called Ring.

      72 points on a circle



      • Create a layer with a single point at the centre (actually you could do this with the "Centroid" of the circles) called Hub

      • Add an attribute to Ring called d with the value 1 for all points.

      • Add an attribute to Hub called d with the value 1.

      • Use "Join by lines (hub lines)" with the Hub as the hub and Ring as the spokes, use d as the field in both cases so you match each ring point to the centre. Call this layer Spokes.

      72 spokes



      • Create a Line version of the circle polygon using "Polygons to Lines" called Rim

      A line geometry in a circle



      • Use "Merge Vector Layers" to merge the Spokes with the Rim in a new layer called Wheel.

      All the lines we need



      • Use "Polygonize" on Wheel to build 72 polygons of five degree angle in a new layer called Wedges:

      Built polygons






      share|improve this answer
























        up vote
        3
        down vote










        up vote
        3
        down vote









        5 degrees is 1/72 of a circle.



        • Use the "Minimum enclosing circles" tool to create a circle with 72 segments.

        Circle with 72 vertices



        • Use "Extract Vertices" to turn this circle into 72 points in a layer called Ring.

        72 points on a circle



        • Create a layer with a single point at the centre (actually you could do this with the "Centroid" of the circles) called Hub

        • Add an attribute to Ring called d with the value 1 for all points.

        • Add an attribute to Hub called d with the value 1.

        • Use "Join by lines (hub lines)" with the Hub as the hub and Ring as the spokes, use d as the field in both cases so you match each ring point to the centre. Call this layer Spokes.

        72 spokes



        • Create a Line version of the circle polygon using "Polygons to Lines" called Rim

        A line geometry in a circle



        • Use "Merge Vector Layers" to merge the Spokes with the Rim in a new layer called Wheel.

        All the lines we need



        • Use "Polygonize" on Wheel to build 72 polygons of five degree angle in a new layer called Wedges:

        Built polygons






        share|improve this answer














        5 degrees is 1/72 of a circle.



        • Use the "Minimum enclosing circles" tool to create a circle with 72 segments.

        Circle with 72 vertices



        • Use "Extract Vertices" to turn this circle into 72 points in a layer called Ring.

        72 points on a circle



        • Create a layer with a single point at the centre (actually you could do this with the "Centroid" of the circles) called Hub

        • Add an attribute to Ring called d with the value 1 for all points.

        • Add an attribute to Hub called d with the value 1.

        • Use "Join by lines (hub lines)" with the Hub as the hub and Ring as the spokes, use d as the field in both cases so you match each ring point to the centre. Call this layer Spokes.

        72 spokes



        • Create a Line version of the circle polygon using "Polygons to Lines" called Rim

        A line geometry in a circle



        • Use "Merge Vector Layers" to merge the Spokes with the Rim in a new layer called Wheel.

        All the lines we need



        • Use "Polygonize" on Wheel to build 72 polygons of five degree angle in a new layer called Wedges:

        Built polygons







        share|improve this answer














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        Spacedman

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