Get Boundary

Get Boundary¶

Get the boundary of an object by: obj.Boundary()

In [1]:

import geokit.core.srs
import geokit.core.geom
import matplotlib.pyplot as plt

import geokit.core.srs import geokit.core.geom import matplotlib.pyplot as plt

In [2]:

# Make a line
aachen_centered_srs = geokit.core.srs.centeredLAEA(6.083, 50.775)

house_polygon = geokit.core.geom.polygon(
    [
        (0, 0),
        (40000, 0),
        (20000, 20000),
        (40000, 40000),
        (0, 40000),
        (0, 0),
    ],
    srs=4326,
)
print(type(house_polygon))
print(house_polygon.GetGeometryName())

# Make a line aachen_centered_srs = geokit.core.srs.centeredLAEA(6.083, 50.775) house_polygon = geokit.core.geom.polygon( [ (0, 0), (40000, 0), (20000, 20000), (40000, 40000), (0, 40000), (0, 0), ], srs=4326, ) print(type(house_polygon)) print(house_polygon.GetGeometryName())

<class 'osgeo.ogr.Geometry'>
POLYGON

In [3]:

# Get a boundary
boundary_polygon = house_polygon.Boundary()
print(type(boundary_polygon))
print(boundary_polygon.GetGeometryName())

# Get a boundary boundary_polygon = house_polygon.Boundary() print(type(boundary_polygon)) print(boundary_polygon.GetGeometryName())

<class 'osgeo.ogr.Geometry'>
LINESTRING

In [4]:

fig, axs = plt.subplots(ncols=2, nrows=1, figsize=(12, 6))
ax_handle = geokit.core.geom.drawGeoms(house_polygon, figsize=(6, 6), color="red", ax=axs[0])
ax_handle = geokit.core.geom.drawGeoms(
    boundary_polygon,
    figsize=(6, 6),
    ax=axs[1],
    color="black",
)

fig, axs = plt.subplots(ncols=2, nrows=1, figsize=(12, 6)) ax_handle = geokit.core.geom.drawGeoms(house_polygon, figsize=(6, 6), color="red", ax=axs[0]) ax_handle = geokit.core.geom.drawGeoms( boundary_polygon, figsize=(6, 6), ax=axs[1], color="black", )