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Keep the holes in the polygon while converting Polygon 25D to Polygon 2D using Python

Geopandas/folium map not displaying?Performing Spatial Join / match Points from dataframe to polygons using Python?geopandas geometry.within problem ValueError: Geometry column cannot contain mutiple geometry typesSpatial join in Geopandas is only finding itselfGeopandas not recognizing geometry typeOverlay Union Geopandas improve performanceGetting error while importing GeoPandas in Python consoleShapely : cascaded_union seems to return too many polygonsGeoPandas equivalent of ST_MakePolygonWrite a Spatial Join output to a CSV?

0

I converted my input file with geometry Polygon 25D to an output file with geometry Polygon using the below code.
As you can see the below image. Problem is that the holes in the polygon is vanished after applying this code. I would like to keep the holes in the polygon.
To achieve that how can I edit or modify the below code?

def convert_3D_2D(geometry):
 import geopandas as gp
 new_geo = []
 for p in geometry:
 if p.has_z:
 if p.geom_type == 'Polygon':
 lines = [xy[:2] for xy in list(p.exterior.coords)]
 new_p = Polygon(lines)
 new_geo.append(new_p)
 elif p.geom_type == 'MultiPolygon':
 new_multi_p = []
 for ap in p:
 lines = [xy[:2] for xy in list(ap.exterior.coords)]
 new_p = Polygon(lines)
 new_p
 new_multi_p.append(new_p)
 new_multi_p
 new_geo.append(MultiPolygon(new_multi_p))
 new_geo
 return new_geo


df = gpd.GeoDataFrame.from_file('input_file_25D.shp')
df.geometry = convert_3D_2D(df.geometry)
df.to_file('output_file_2D.shp')

geopandas python-3

share|improve this question

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

add a comment | 

0

I converted my input file with geometry Polygon 25D to an output file with geometry Polygon using the below code.
As you can see the below image. Problem is that the holes in the polygon is vanished after applying this code. I would like to keep the holes in the polygon.
To achieve that how can I edit or modify the below code?

def convert_3D_2D(geometry):
 import geopandas as gp
 new_geo = []
 for p in geometry:
 if p.has_z:
 if p.geom_type == 'Polygon':
 lines = [xy[:2] for xy in list(p.exterior.coords)]
 new_p = Polygon(lines)
 new_geo.append(new_p)
 elif p.geom_type == 'MultiPolygon':
 new_multi_p = []
 for ap in p:
 lines = [xy[:2] for xy in list(ap.exterior.coords)]
 new_p = Polygon(lines)
 new_p
 new_multi_p.append(new_p)
 new_multi_p
 new_geo.append(MultiPolygon(new_multi_p))
 new_geo
 return new_geo


df = gpd.GeoDataFrame.from_file('input_file_25D.shp')
df.geometry = convert_3D_2D(df.geometry)
df.to_file('output_file_2D.shp')

geopandas python-3

share|improve this question

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

add a comment | 

I converted my input file with geometry Polygon 25D to an output file with geometry Polygon using the below code.
As you can see the below image. Problem is that the holes in the polygon is vanished after applying this code. I would like to keep the holes in the polygon.
To achieve that how can I edit or modify the below code?

def convert_3D_2D(geometry):
 import geopandas as gp
 new_geo = []
 for p in geometry:
 if p.has_z:
 if p.geom_type == 'Polygon':
 lines = [xy[:2] for xy in list(p.exterior.coords)]
 new_p = Polygon(lines)
 new_geo.append(new_p)
 elif p.geom_type == 'MultiPolygon':
 new_multi_p = []
 for ap in p:
 lines = [xy[:2] for xy in list(ap.exterior.coords)]
 new_p = Polygon(lines)
 new_p
 new_multi_p.append(new_p)
 new_multi_p
 new_geo.append(MultiPolygon(new_multi_p))
 new_geo
 return new_geo


df = gpd.GeoDataFrame.from_file('input_file_25D.shp')
df.geometry = convert_3D_2D(df.geometry)
df.to_file('output_file_2D.shp')

geopandas python-3

share|improve this question

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

def convert_3D_2D(geometry):
 import geopandas as gp
 new_geo = []
 for p in geometry:
 if p.has_z:
 if p.geom_type == 'Polygon':
 lines = [xy[:2] for xy in list(p.exterior.coords)]
 new_p = Polygon(lines)
 new_geo.append(new_p)
 elif p.geom_type == 'MultiPolygon':
 new_multi_p = []
 for ap in p:
 lines = [xy[:2] for xy in list(ap.exterior.coords)]
 new_p = Polygon(lines)
 new_p
 new_multi_p.append(new_p)
 new_multi_p
 new_geo.append(MultiPolygon(new_multi_p))
 new_geo
 return new_geo


df = gpd.GeoDataFrame.from_file('input_file_25D.shp')
df.geometry = convert_3D_2D(df.geometry)
df.to_file('output_file_2D.shp')

share|improve this question

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

share|improve this question

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

edited 2 days ago

Vince

14.8k32849

edited 2 days ago

Vince

14.8k32849

asked 2 days ago

roshualineroshualine

297

asked 2 days ago

roshualineroshualine

297