强行裁剪多边形成多个多边形

 from osgeo import ogr

# Given a test polygon
poly_wkt= "POLYGON ((1179091.164690328761935 712782.883845978067257,1161053.021822647424415 667456.268434881232679,1214704.933941904921085 641092.828859039116651,1228580.428455505985767 682719.312399842427112,1218405.065812198445201 721108.180554138729349,1179091.164690328761935 712782.883845978067257))"
geom_poly = ogr.CreateGeometryFromWkt(poly_wkt)

# Force a polygon to multipolygon
if geom_poly.GetGeometryType() == ogr.wkbPolygon:
   geom_poly = ogr.ForceToMultiPolygon(geom_poly)
   # if are iterating over features just to update the geometry
   # to multipolygon you can update the geometry using "feature.SetGeometryDirectly(geom_poly)"

# Then export geometry to WKT
wkt = geom_poly.ExportToWkt()
print wkt