Finding Square Polygons using ArcGIS Desktop? [closed]
Anyone know of an ArcGIS tool (or trick!) to determine square polygons?
This is sort of a - find the geometric shape of a polygon, if all lines of a polygon are equidistant then YES (select)
Seems easy, yet .. .
Thoughts?
arcgis-desktop polygon geometry calculate-geometry
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
asked Nov 12 at 6:47
user23482
212
closed as primarily opinion-based by ahmadhanb, LaughU, Jochen Schwarze, whyzar, xunilk Nov 13 at 0:24
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
Anyone know of an ArcGIS tool (or trick!) to determine square polygons?
This is sort of a - find the geometric shape of a polygon, if all lines of a polygon are equidistant then YES (select)
Seems easy, yet .. .
Thoughts?
arcgis-desktop polygon geometry calculate-geometry
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
asked Nov 12 at 6:47
user23482
212
closed as primarily opinion-based by ahmadhanb, LaughU, Jochen Schwarze, whyzar, xunilk Nov 13 at 0:24
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
1
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
1
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41
add a comment |
Anyone know of an ArcGIS tool (or trick!) to determine square polygons?
This is sort of a - find the geometric shape of a polygon, if all lines of a polygon are equidistant then YES (select)
Seems easy, yet .. .
Thoughts?
arcgis-desktop polygon geometry calculate-geometry
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
asked Nov 12 at 6:47
user23482
212
Anyone know of an ArcGIS tool (or trick!) to determine square polygons?
This is sort of a - find the geometric shape of a polygon, if all lines of a polygon are equidistant then YES (select)
Seems easy, yet .. .
Thoughts?
arcgis-desktop polygon geometry calculate-geometry
arcgis-desktop polygon geometry calculate-geometry
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
asked Nov 12 at 6:47
user23482
212
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
asked Nov 12 at 6:47
user23482
212
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
edited Nov 12 at 6:53
PolyGeo♦
53.1k1779238
53.1k1779238
asked Nov 12 at 6:47
user23482
212
asked Nov 12 at 6:47
user23482
212
asked Nov 12 at 6:47
user23482
212
212
closed as primarily opinion-based by ahmadhanb, LaughU, Jochen Schwarze, whyzar, xunilk Nov 13 at 0:24
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as primarily opinion-based by ahmadhanb, LaughU, Jochen Schwarze, whyzar, xunilk Nov 13 at 0:24
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
1
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
1
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41
add a comment |
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
1
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
1
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
1
1
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
1
1
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41
add a comment |
1 Answer
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If you have shape area and length fields for your polygons, an SQL expression like
(length / 4) * (length / 4) = area or POWER(length / 4, 2) = area should select the polygons that are perfectly square.
You can introduce some error margin with something like
POWER(length / 4, 2) < area + (area * 0.01) AND POWER(length / 4, 2) > area - (area * 0.01), e.g. +/- 1% difference in area.
answered Nov 12 at 7:36
fatih_dur
3,5502927
This got it! Thanks.
– user23482
Nov 13 at 1:04
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you have shape area and length fields for your polygons, an SQL expression like
(length / 4) * (length / 4) = area or POWER(length / 4, 2) = area should select the polygons that are perfectly square.
You can introduce some error margin with something like
POWER(length / 4, 2) < area + (area * 0.01) AND POWER(length / 4, 2) > area - (area * 0.01), e.g. +/- 1% difference in area.
answered Nov 12 at 7:36
fatih_dur
3,5502927
This got it! Thanks.
– user23482
Nov 13 at 1:04
add a comment |
If you have shape area and length fields for your polygons, an SQL expression like
(length / 4) * (length / 4) = area or POWER(length / 4, 2) = area should select the polygons that are perfectly square.
You can introduce some error margin with something like
POWER(length / 4, 2) < area + (area * 0.01) AND POWER(length / 4, 2) > area - (area * 0.01), e.g. +/- 1% difference in area.
answered Nov 12 at 7:36
fatih_dur
3,5502927
This got it! Thanks.
– user23482
Nov 13 at 1:04
add a comment |
If you have shape area and length fields for your polygons, an SQL expression like
(length / 4) * (length / 4) = area or POWER(length / 4, 2) = area should select the polygons that are perfectly square.
You can introduce some error margin with something like
POWER(length / 4, 2) < area + (area * 0.01) AND POWER(length / 4, 2) > area - (area * 0.01), e.g. +/- 1% difference in area.
answered Nov 12 at 7:36
fatih_dur
3,5502927
If you have shape area and length fields for your polygons, an SQL expression like
(length / 4) * (length / 4) = area or POWER(length / 4, 2) = area should select the polygons that are perfectly square.
You can introduce some error margin with something like
POWER(length / 4, 2) < area + (area * 0.01) AND POWER(length / 4, 2) > area - (area * 0.01), e.g. +/- 1% difference in area.
answered Nov 12 at 7:36
fatih_dur
3,5502927
answered Nov 12 at 7:36
fatih_dur
3,5502927
answered Nov 12 at 7:36
fatih_dur
3,5502927
answered Nov 12 at 7:36
fatih_dur
3,5502927
3,5502927
This got it! Thanks.
– user23482
Nov 13 at 1:04
add a comment |
This got it! Thanks.
– user23482
Nov 13 at 1:04
This got it! Thanks.
– user23482
Nov 13 at 1:04
This got it! Thanks.
– user23482
Nov 13 at 1:04
add a comment |
We're a little different from other sites; this isn't a discussion forum but a Q&A site. Your questions should as much as possible describe not just what you want to do, but precisely what you have tried and where you are stuck trying that. Please check out our short tour which describes how the site works. I think that this would be relatively straightforward to do using ArcPy so I think you should give that a try. Alternatively, use the Field Calculator to get polygons with only four vertices and then convert your polygons to lines to check if all lines from same poly are same length.
– PolyGeo♦
Nov 12 at 6:56
ahh thanks for simplifying it for me. I think this may work.
– user23482
Nov 12 at 14:45
1
The sides of a square would only be equal in Cartesian coordinate reference; in a geographic coordinate reference you'd have to do a good deal more processing.
– Vince
Nov 12 at 14:55
1
Further, a rhombus would meet the criteria for equal side lengths, but not square. You'll need to check the angles of the vertices. Perhaps compare the shape to the rotated bounding box of each polygon. All of this accounts for additional processing as per @Vince's comment.
– Fezter♦
Nov 12 at 22:41