I found a lot of posts on how to calculate distance between two points or from one point to polygon but I simply can’t find how to calculate distance of each edge. I have a polygon, where the coordinates are these:
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x
20
20
1
[[[623 284]] 2
3
[[526 256]]4
5
[[532 189]]6
7
[[504 166]]8
9
[[323 175]]10
11
[[276 219]]12
13
[[119 221]]14
15
[[ 1 272]]16
17
[[ 0 473]]18
19
[[615 479]]]20
I simply want to calculate length of each edge. Maybe I should use (math.dist(p, q)) with for loop or something?
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Answer
If points coordinates are stored in two python lists x and y, then you can calculate each edge length with:
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7
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import numpy as np2
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x.append(x[0])4
y.append(y[0])5
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d = [np.sqrt((x[i + 1] - x[i])**2 + (y[i + 1] - y[i])**2) for i in range(len(x) - 1)]7
The append is required in order to close the polygon and calculate all edges length. With points you provided above, the edges distances are:
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1
2
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[100.96038827183659, 67.26812023536856, 36.235341863986875, 181.22361876973983, 64.38167441127949, 157.01273833673497, 128.5496013218244, 201.0024875467963, 615.0292675962665, 195.1640335717624]2