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Confusion regarding topojson Polygon coordinates
The Next CEO of Stack OverflowTopoJSON without Quantizationgeojson -> topojson : no outputProblems installing TopoJSONTruly lossless TopoJSON / keep all coordinates in TopoJSONAdjacency matrix from TopoJSONList of coordinates to TopojsonReading topojson file in d3.js problemHow do I merge csv data into topojson file?Install topojson on the command line
I have a topojson file which represents a hexagon. A hexagon has 6 vertices, so I was expecting the arcs attribute of topojson file would contain 6 points, but it contains 7.
I wanted to know why there are 7 coordinates instead of 6, and what does that extra coordinate represent?
"type": "Topology", "arcs": [
[
[
0,
1
],
[
0.5,
0.86
],
[
0.5,
-0.86
],
[
0,
-1
],
[
-0.5,
-0.86
],
[
-0.5,
0.86
],
[
0,
1
]
] ], "transform":
"scale": [
1,
0.5
],
"translate": [
0,
0
] , "objects":
"state":
"type": "GeometryCollection",
"geometries": [
"arcs": [
[
0
]
],
"type": "Polygon",
"id": "A&N ISLANDS"
]
polygon mapping topojson
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a topojson file which represents a hexagon. A hexagon has 6 vertices, so I was expecting the arcs attribute of topojson file would contain 6 points, but it contains 7.
I wanted to know why there are 7 coordinates instead of 6, and what does that extra coordinate represent?
"type": "Topology", "arcs": [
[
[
0,
1
],
[
0.5,
0.86
],
[
0.5,
-0.86
],
[
0,
-1
],
[
-0.5,
-0.86
],
[
-0.5,
0.86
],
[
0,
1
]
] ], "transform":
"scale": [
1,
0.5
],
"translate": [
0,
0
] , "objects":
"state":
"type": "GeometryCollection",
"geometries": [
"arcs": [
[
0
]
],
"type": "Polygon",
"id": "A&N ISLANDS"
]
polygon mapping topojson
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have a topojson file which represents a hexagon. A hexagon has 6 vertices, so I was expecting the arcs attribute of topojson file would contain 6 points, but it contains 7.
I wanted to know why there are 7 coordinates instead of 6, and what does that extra coordinate represent?
"type": "Topology", "arcs": [
[
[
0,
1
],
[
0.5,
0.86
],
[
0.5,
-0.86
],
[
0,
-1
],
[
-0.5,
-0.86
],
[
-0.5,
0.86
],
[
0,
1
]
] ], "transform":
"scale": [
1,
0.5
],
"translate": [
0,
0
] , "objects":
"state":
"type": "GeometryCollection",
"geometries": [
"arcs": [
[
0
]
],
"type": "Polygon",
"id": "A&N ISLANDS"
]
polygon mapping topojson
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have a topojson file which represents a hexagon. A hexagon has 6 vertices, so I was expecting the arcs attribute of topojson file would contain 6 points, but it contains 7.
I wanted to know why there are 7 coordinates instead of 6, and what does that extra coordinate represent?
"type": "Topology", "arcs": [
[
[
0,
1
],
[
0.5,
0.86
],
[
0.5,
-0.86
],
[
0,
-1
],
[
-0.5,
-0.86
],
[
-0.5,
0.86
],
[
0,
1
]
] ], "transform":
"scale": [
1,
0.5
],
"translate": [
0,
0
] , "objects":
"state":
"type": "GeometryCollection",
"geometries": [
"arcs": [
[
0
]
],
"type": "Polygon",
"id": "A&N ISLANDS"
]
polygon mapping topojson
polygon mapping topojson
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Arihant ParsoyaArihant Parsoya
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Arihant ParsoyaArihant Parsoya
1
asked yesterday
Arihant ParsoyaArihant Parsoya
1
1
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Arihant Parsoya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
The 1st and last vertices of a closed polygon are always the same, so a triangle is defined by 4 points
answered yesterday
JGHJGH
13.3k21139
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The 1st and last vertices of a closed polygon are always the same, so a triangle is defined by 4 points
answered yesterday
JGHJGH
13.3k21139
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
add a comment |
The 1st and last vertices of a closed polygon are always the same, so a triangle is defined by 4 points
answered yesterday
JGHJGH
13.3k21139
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
add a comment |
The 1st and last vertices of a closed polygon are always the same, so a triangle is defined by 4 points
answered yesterday
JGHJGH
13.3k21139
The 1st and last vertices of a closed polygon are always the same, so a triangle is defined by 4 points
answered yesterday
JGHJGH
13.3k21139
answered yesterday
JGHJGH
13.3k21139
answered yesterday
JGHJGH
13.3k21139
answered yesterday
JGHJGH
13.3k21139
13.3k21139
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
add a comment |
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
1
1
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
To give some reference to this answer github.com/topojson/topojson-specification#225-polygon (The TopoJSON Format Specification)
– J.R
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thanks @J.R . Let's note that this convention is largely adopted in other data formats as well
– JGH
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
Thank you for your reply. I have another topojson file where the first and the last point of the Polygon is not same. File Link: github.com/info-design-lab/election2019/blob/gh-pages/map/…
– Arihant Parsoya
yesterday
add a comment |
Arihant Parsoya is a new contributor. Be nice, and check out our Code of Conduct.
Arihant Parsoya is a new contributor. Be nice, and check out our Code of Conduct.
Arihant Parsoya is a new contributor. Be nice, and check out our Code of Conduct.
Arihant Parsoya is a new contributor. Be nice, and check out our Code of Conduct.
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