How to find intersection polygons in single layer on QGIS version 3.4.2?
2
I have polygons intersection in single layer. I want polygon in yellow frame and use polygon intersection to calculate area , how to do this?
polygon qgis-3.0 intersection
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
add a comment |
2
I have polygons intersection in single layer. I want polygon in yellow frame and use polygon intersection to calculate area , how to do this?
polygon qgis-3.0 intersection
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02
add a comment |
2
2
2
I have polygons intersection in single layer. I want polygon in yellow frame and use polygon intersection to calculate area , how to do this?
polygon qgis-3.0 intersection
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
I have polygons intersection in single layer. I want polygon in yellow frame and use polygon intersection to calculate area , how to do this?
polygon qgis-3.0 intersection
polygon qgis-3.0 intersection
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
edited Dec 12 '18 at 2:09
ahmadhanb
21.7k31951
21.7k31951
asked Dec 12 '18 at 1:53
p wat
133
asked Dec 12 '18 at 1:53
p wat
133
asked Dec 12 '18 at 1:53
p wat
133
133
Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02
add a comment |
Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02
Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02
add a comment |
1 Answer
1
active
oldest
votes
3
In the processing toolbox, there is a tool named Polygon self-intersection that can be used to extract the intersection polygon in the same layer:
Input file:
Using the tool:
After running the tool:
Then you can calculate the area.
I am using QGIS 3.4.2
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write$areaand click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.
– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
3
In the processing toolbox, there is a tool named Polygon self-intersection that can be used to extract the intersection polygon in the same layer:
Input file:
Using the tool:
After running the tool:
Then you can calculate the area.
I am using QGIS 3.4.2
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write$areaand click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.
– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
add a comment |
3
In the processing toolbox, there is a tool named Polygon self-intersection that can be used to extract the intersection polygon in the same layer:
Input file:
Using the tool:
After running the tool:
Then you can calculate the area.
I am using QGIS 3.4.2
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write$areaand click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.
– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
add a comment |
3
3
3
In the processing toolbox, there is a tool named Polygon self-intersection that can be used to extract the intersection polygon in the same layer:
Input file:
Using the tool:
After running the tool:
Then you can calculate the area.
I am using QGIS 3.4.2
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
In the processing toolbox, there is a tool named Polygon self-intersection that can be used to extract the intersection polygon in the same layer:
Input file:
Using the tool:
After running the tool:
Then you can calculate the area.
I am using QGIS 3.4.2
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
answered Dec 12 '18 at 2:07
ahmadhanb
21.7k31951
21.7k31951
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write$areaand click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.
– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
add a comment |
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write$areaand click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.
– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
thank you. it work fine. If I want to show polygon intersection specifically. How to do ?
– p wat
Dec 12 '18 at 2:19
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
@pwat I am not sure how you can show the intersection, but the only thing that can come to my mind is to use the symbology. Go to Layer Properties -> Categorized -> Select ID column or Area column -> Classify your polygons based on ID or Area. You can delete unwanted classes in the style, if necessary
– ahmadhanb
Dec 12 '18 at 2:27
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
thank you. after I use self-intersection value in attribute of intersection is null how to fix this?
– p wat
Dec 12 '18 at 2:30
1
1
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write
$area and click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.– ahmadhanb
Dec 12 '18 at 2:35
@pwat What value? if it is area attribute, you should select the row, then select the area field from the drop-down list and write
$area and click on update selected. If this is not you question, then it is better to ask another question on another thread and make your question clear because you can only ask one question at a time.– ahmadhanb
Dec 12 '18 at 2:35
thank you very much
– p wat
Dec 12 '18 at 7:27
thank you very much
– p wat
Dec 12 '18 at 7:27
add a comment |
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Have a read of docs.qgis.org/2.18/en/docs/user_manual/plugins/… which will help you find overlapping polygons in the same layer, use the rule Must not overlap
– Michael Stimson
Dec 12 '18 at 1:59
@MichaelStimson Thank you but I want Intersection polygon to calculate area intersection, you have any solution?
– p wat
Dec 12 '18 at 2:02