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Added picture for more clarity
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Sken2107
Sken2107
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Using the steps below you should be able to do that:

  • Create a new attribute for your circle-like polygons (let's call it "Plot Number") in the attribute table.
  • Use the "Select by Location" tool (Processing Toolbox -> Vector Selection, with the geometric predicate "are within") and then the Field Calculator in your Attribute Table (don't forget to tick "Only update n selected features" at the top) to give each circle-like polygon its Plot Number (for instance all circle-like polygons within Plot 1 will have "Plot 1" as the Plot Number attribute)
  • Use "Dissolve" (Processing Toolbox -> Vector Geometry) with Plot Number as the "Dissolve field(s)" so that your circle-like polygons will be grouped by their Plot Number attribute.
  • Now you can select all circle-like polygons by the plot they fall in and do all the calculations you want based on that.

Your final result should look something like the image below.

enter image description here

Using the steps below you should be able to do that:

  • Create a new attribute for your circle-like polygons (let's call it "Plot Number") in the attribute table.
  • Use the "Select by Location" tool (Processing Toolbox -> Vector Selection, with the geometric predicate "are within") and then the Field Calculator in your Attribute Table (don't forget to tick "Only update n selected features" at the top) to give each circle-like polygon its Plot Number (for instance all circle-like polygons within Plot 1 will have "Plot 1" as the Plot Number attribute)
  • Use "Dissolve" (Processing Toolbox -> Vector Geometry) with Plot Number as the "Dissolve field(s)" so that your circle-like polygons will be grouped by their Plot Number attribute.
  • Now you can select all circle-like polygons by the plot they fall in and do all the calculations you want based on that.

Using the steps below you should be able to do that:

  • Create a new attribute for your circle-like polygons (let's call it "Plot Number") in the attribute table.
  • Use the "Select by Location" tool (Processing Toolbox -> Vector Selection, with the geometric predicate "are within") and then the Field Calculator in your Attribute Table (don't forget to tick "Only update n selected features" at the top) to give each circle-like polygon its Plot Number (for instance all circle-like polygons within Plot 1 will have "Plot 1" as the Plot Number attribute)
  • Use "Dissolve" (Processing Toolbox -> Vector Geometry) with Plot Number as the "Dissolve field(s)" so that your circle-like polygons will be grouped by their Plot Number attribute.
  • Now you can select all circle-like polygons by the plot they fall in and do all the calculations you want based on that.

Your final result should look something like the image below.

enter image description here

Source Link
Sken2107
Sken2107
  • 211
  • 1
  • 4

Using the steps below you should be able to do that:

  • Create a new attribute for your circle-like polygons (let's call it "Plot Number") in the attribute table.
  • Use the "Select by Location" tool (Processing Toolbox -> Vector Selection, with the geometric predicate "are within") and then the Field Calculator in your Attribute Table (don't forget to tick "Only update n selected features" at the top) to give each circle-like polygon its Plot Number (for instance all circle-like polygons within Plot 1 will have "Plot 1" as the Plot Number attribute)
  • Use "Dissolve" (Processing Toolbox -> Vector Geometry) with Plot Number as the "Dissolve field(s)" so that your circle-like polygons will be grouped by their Plot Number attribute.
  • Now you can select all circle-like polygons by the plot they fall in and do all the calculations you want based on that.