# Python：ポリゴンの「内部重心」（アークマップではlabelPointとも呼ばれます）を計算する方法を見つけます

12

（不規則な）ポリゴンの内側のポイント（アークマップではlabelPointとも呼ばれます）のX、Y座標を計算する方法を探しています。ArcGISモジュールを使用せずに解決策を見つけようとしています。

「重心」とlabelPointの違いは、重心が多角形の外側にある可能性があることです。

shapely.geometryインポートポリゴンから

ref_polygon = Polygon(points)
# get the x and y coordinate of the centroid
ref_polygon.centroid.wkt
'POINT (558768.9293489187300000 6361851.0362532493000000)'

ヘルプと提案を事前に感謝します

points = [(560036.4495758876, 6362071.890493258),
(560036.4495758876, 6362070.890493258),
(560036.9495758876, 6362070.890493258),
(560036.9495758876, 6362070.390493258),
(560037.4495758876, 6362070.390493258),
(560037.4495758876, 6362064.890493258),
(560036.4495758876, 6362064.890493258),
(560036.4495758876, 6362063.390493258),
(560035.4495758876, 6362063.390493258),
(560035.4495758876, 6362062.390493258),
(560034.9495758876, 6362062.390493258),
(560034.9495758876, 6362061.390493258),
(560032.9495758876, 6362061.390493258),
(560032.9495758876, 6362061.890493258),
(560030.4495758876, 6362061.890493258),
(560030.4495758876, 6362061.390493258),
(560029.9495758876, 6362061.390493258),
(560029.9495758876, 6362060.390493258),
(560029.4495758876, 6362060.390493258),
(560029.4495758876, 6362059.890493258),
(560028.9495758876, 6362059.890493258),
(560028.9495758876, 6362059.390493258),
(560028.4495758876, 6362059.390493258),
(560028.4495758876, 6362058.890493258),
(560027.4495758876, 6362058.890493258),
(560027.4495758876, 6362058.390493258),
(560026.9495758876, 6362058.390493258),
(560026.9495758876, 6362057.890493258),
(560025.4495758876, 6362057.890493258),
(560025.4495758876, 6362057.390493258),
(560023.4495758876, 6362057.390493258),
(560023.4495758876, 6362060.390493258),
(560023.9495758876, 6362060.390493258),
(560023.9495758876, 6362061.890493258),
(560024.4495758876, 6362061.890493258),
(560024.4495758876, 6362063.390493258),
(560024.9495758876, 6362063.390493258),
(560024.9495758876, 6362064.390493258),
(560025.4495758876, 6362064.390493258),
(560025.4495758876, 6362065.390493258),
(560025.9495758876, 6362065.390493258),
(560025.9495758876, 6362065.890493258),
(560026.4495758876, 6362065.890493258),
(560026.4495758876, 6362066.890493258),
(560026.9495758876, 6362066.890493258),
(560026.9495758876, 6362068.390493258),
(560027.4495758876, 6362068.390493258),
(560027.4495758876, 6362068.890493258),
(560027.9495758876, 6362068.890493258),
(560027.9495758876, 6362069.390493258),
(560028.4495758876, 6362069.390493258),
(560028.4495758876, 6362069.890493258),
(560033.4495758876, 6362069.890493258),
(560033.4495758876, 6362070.390493258),
(560033.9495758876, 6362070.390493258),
(560033.9495758876, 6362070.890493258),
(560034.4495758876, 6362070.890493258),
(560034.4495758876, 6362071.390493258),
(560034.9495758876, 6362071.390493258),
(560034.9495758876, 6362071.890493258),
(560036.4495758876, 6362071.890493258)]

7

http://toblerity.github.com/shapely/manual.html#object.representative_point

+ 1、Gianniはアーク中心のバックグラウンドで始まったのではないかと疑っています。ESRIは実際、これをlabelPoint彼らのシステムと呼んでいます。他のテクノロジーやAPIにもこれと同義語があることを知り、嬉しく思います。
elrobis