空間演算：新しいジオメトリの作成

Pythonで扱う地理空間データ

Joris Van den Bossche

Open source software developer and teacher, GeoPandas maintainer

空間演算

空間演算：交差

空間演算：和集合

空間演算：差集合

GeoPandas による空間演算

africa.head()

           name             geometry
0        Angola  (POLYGON ((23.90...
1       Burundi  POLYGON ((29.339...
2         Benin  POLYGON ((2.6917...
3  Burkina Faso  POLYGON ((2.1544...
4      Botswana  POLYGON ((29.432...

GeoPandas による空間演算

print(box)

POLYGON ((60 10, 60 -10, -20 -10, -20 10))

GeoPandas による空間演算

africa.intersection(box)

GeoPandas による空間演算

africa.head()

           name                                           geometry
0        Angola  (POLYGON ((23.90415368011818 -11.7222815894063...
1       Burundi  POLYGON ((29.33999759290035 -4.499983412294092...
2      Botswana  POLYGON ((29.43218834810904 -22.09131275806759...
...

africa.intersection(box)

0    (POLYGON ((13.22332255001795 -10, 13.120987583...
1    POLYGON ((29.33999759290035 -4.499983412294092...
2                                                   ()
...
dtype: object

練習してみましょう！

Pythonで扱う地理空間データ