284 lines
13 KiB
Python
284 lines
13 KiB
Python
"""
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CityGml module parses citygml files and import the geometry into the city model structure
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
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"""
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import numpy as np
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import xmltodict
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from city_model_structure.city import City
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from city_model_structure.building import Building
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from city_model_structure.attributes.surface import Surface
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from helpers.geometry_helper import GeometryHelper
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from city_model_structure.attributes.polygon import Polygon
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class CityGml:
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"""
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CityGml class
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"""
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def __init__(self, path):
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self._city = None
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with open(path) as gml:
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# Clean the namespaces is an important task to prevent wrong ns:field due poor citygml implementations
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self._gml = xmltodict.parse(gml.read(), process_namespaces=True, xml_attribs=True, namespaces={
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'http://www.opengis.net/gml': None,
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'http://www.opengis.net/citygml/1.0': None,
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'http://www.opengis.net/citygml/building/1.0': None,
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'http://schemas.opengis.net/citygml/building/1.0/building.xsd': None,
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'http://www.opengis.net/citygml/appearance/1.0': None,
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'http://schemas.opengis.net/citygml/appearance/1.0/appearance.xsd': None,
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'http://www.opengis.net/citygml/relief/1.0': None,
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'http://schemas.opengis.net/citygml/relief/1.0/relief.xsd': None,
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'http://www.opengis.net/citygml/generics/1.0': None,
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'http://www.w3.org/2001/XMLSchema-instance': None,
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'urn:oasis:names:tc:ciq:xsdschema:xAL:2.0': None,
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'http://www.w3.org/1999/xlink': None,
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'http://www.opengis.net/citygml/relief/2.0': None,
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'http://www.opengis.net/citygml/building/2.0': None,
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'http://www.opengis.net/citygml/building/2.0 http://schemas.opengis.net/citygml/building/2.0/building.xsd '
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'http://www.opengis.net/citygml/relief/2.0 http://schemas.opengis.net/citygml/relief/2.0/relief.xsd" '
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'xmlns="http://www.opengis.net/citygml/2.0': None,
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'http://www.opengis.net/citygml/2.0': None
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}, force_list=('cityObjectMember', 'curveMember', 'boundedBy', 'surfaceMember'))
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self._city_objects = None
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self._geometry = GeometryHelper()
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for bound in self._gml['CityModel']['boundedBy']:
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envelope = bound['Envelope']
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if '#text' in envelope['lowerCorner']:
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self._lower_corner = np.fromstring(envelope['lowerCorner']['#text'], dtype=float, sep=' ')
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self._upper_corner = np.fromstring(envelope['upperCorner']['#text'], dtype=float, sep=' ')
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else:
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self._lower_corner = np.fromstring(envelope['lowerCorner'], dtype=float, sep=' ')
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self._upper_corner = np.fromstring(envelope['upperCorner'], dtype=float, sep=' ')
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if '@srsName' in envelope:
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self._srs_name = envelope['@srsName']
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@property
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def content(self):
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"""
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CityGml raw content
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:return: str
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"""
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return self._gml
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@property
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def city(self) -> City:
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"""
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City model structure enriched with the geometry information
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:return: City
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"""
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if self._city is None:
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# todo: refactor this method to clearly choose the gml type
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self._city = City(self._lower_corner, self._upper_corner, self._srs_name)
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i = 0
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building_part = None
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for o in self._gml['CityModel']['cityObjectMember']:
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i += 1
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lod = 0
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surfaces = []
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if 'lod1Solid' in o['Building']:
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lod += 1
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surfaces = CityGml._lod1_solid(o)
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elif 'lod1MultiSurface' in o['Building']:
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lod += 1
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surfaces = CityGml._lod1_multi_surface(o)
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elif 'lod2MultiSurface' in o['Building']:
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# todo: check if this is a real case or a miss-formed citygml
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lod = 2
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surfaces = surfaces + CityGml._lod2_solid_multi_surface(o)
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else:
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for bound in o['Building']['boundedBy']:
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surface_type = next(iter(bound))
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if 'lod2MultiSurface' in bound[surface_type]:
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lod = 2
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surfaces = surfaces + CityGml._lod2(bound)
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if 'lod3Solid' in o['Building']:
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lod += 4
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if 'lod4Solid' in o['Building']:
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lod += 8
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lod_terrain_str = 'lod' + str(lod) + 'TerrainIntersection'
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terrains = []
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if lod_terrain_str in o['Building']:
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terrains = self._terrains(o, lod_terrain_str)
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function = None
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year_of_construction = None
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if 'consistsOfBuildingPart' in o['Building']:
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if 'BuildingPart' in o['Building']['consistsOfBuildingPart']:
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name = o['Building']['consistsOfBuildingPart']['BuildingPart']['name']
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if 'yearOfConstruction' in o['Building']['consistsOfBuildingPart']['BuildingPart']:
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year_of_construction = o['Building']['consistsOfBuildingPart']['BuildingPart']['yearOfConstruction']
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if 'function' in o['Building']['consistsOfBuildingPart']['BuildingPart']:
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function = o['Building']['consistsOfBuildingPart']['BuildingPart']['function']
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else:
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name = o['Building']['@id']
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if 'yearOfConstruction' in o['Building']:
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year_of_construction = o['Building']['yearOfConstruction']
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if 'function' in o['Building']:
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function = o['Building']['function']
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self._city.add_city_object(Building(name, lod, surfaces, year_of_construction, function, self._lower_corner,
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terrains))
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return self._city
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def _terrains(self, city_object, lod_terrain_str):
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try:
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curves = [c['LineString']['posList']['#text']
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for c in city_object['Building'][lod_terrain_str]['MultiCurve']['curveMember']]
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except TypeError:
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curves = [c['LineString']['posList']
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for c in city_object['Building'][lod_terrain_str]['MultiCurve']['curveMember']]
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terrains = []
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for curve in curves:
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curve_points = np.fromstring(curve, dtype=float, sep=' ')
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curve_points = self._geometry.to_points_matrix(curve_points)
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terrains.append(curve_points)
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return terrains
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@staticmethod
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def _lod1_solid(o):
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try:
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solid_points = [CityGml._solid_points(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']['#text']))
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for s in o['Building']['lod1Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']]
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except TypeError:
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solid_points = [CityGml._solid_points(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
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for s in o['Building']['lod1Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']]
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return [Surface(Polygon(sp),Polygon(sp)) for sp in solid_points]
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@staticmethod
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def _lod1_multi_surface(o):
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solid_points = [CityGml._solid_points(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
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for s in o['Building']['lod1MultiSurface']['MultiSurface']['surfaceMember']]
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return [Surface(Polygon(sp),Polygon(sp)) for sp in solid_points]
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@staticmethod
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def _lod2_solid_multi_surface(o):
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if 'boundedBy' in o['Building']['consistsOfBuildingPart']['BuildingPart']:
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if 'RoofSurface' in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']:
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if o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['RoofSurface']['lod2MultiSurface'] != 'None':
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polygons = [Polygon(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
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for s in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['RoofSurface']['lod2MultiSurface']['MultiSurface']['surfaceMember']]
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elif 'WallSurface' in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']:
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if o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['WallSurface']['lod2MultiSurface'] != 'None':
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polygons = [Polygon(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
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for s in o['Building']['consistsOfBuildingPart']['BuildingPart']['boundedBy']['WallSurface']['lod2MultiSurface']['MultiSurface']['surfaceMember']]
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else:
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polygons = [Polygon(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']))
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for s in o['Building']['lod2MultiSurface']['MultiSurface']['surfaceMember']]
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return [Surface(p,p) for p in polygons]
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@staticmethod
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def _lod2_composite_surface(s):
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solid_points = [CityGml._solid_points((CityGml._remove_last_point(sm['Polygon']['exterior']['LinearRing']['posList'])))
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for sm in s['CompositeSurface']['surfaceMember']]
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return [Surface(Polygon(sp),Polygon(sp)) for sp in solid_points]
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@staticmethod
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def _lod2_multi_surface(s, surface_type):
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# todo: this need to be changed into surface bounded?
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try:
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solid_points = [CityGml._solid_points(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']['posList']
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['#text']))]
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except TypeError:
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solid_points = [CityGml._solid_points(CityGml._remove_last_point(s['Polygon']['exterior']['LinearRing']
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['posList']))]
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return [Surface(Polygon(sp),Polygon(sp), surface_type=surface_type) for sp in solid_points]
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@staticmethod
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def _lod2(bound):
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surfaces = []
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for surface_type in iter(bound):
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for s in bound[surface_type]['lod2MultiSurface']['MultiSurface']['surfaceMember']:
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if 'CompositeSurface' in s:
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surfaces = surfaces + CityGml._lod2_composite_surface(s)
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else:
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surfaces = surfaces + CityGml._lod2_multi_surface(s, surface_type)
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return surfaces
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@staticmethod
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def _remove_last_point(points):
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array = points.split(' ')
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res = " "
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return res.join(array[0:len(array) - 3])
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@staticmethod
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def _solid_points(coordinates) -> np.ndarray:
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"""
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Solid surface point matrix [[x, y, z],[x, y, z],...]
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:parameter coordinates: string from file
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:return: np.ndarray
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"""
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solid_points = np.fromstring(coordinates, dtype=float, sep=' ')
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solid_points = GeometryHelper.to_points_matrix(solid_points)
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return solid_points
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@staticmethod
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def _holes_points(holes_coordinates) -> [np.ndarray]:
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"""
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Holes surfaces point matrices [[[x, y, z],[x, y, z],...]]
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:parameter holes_coordinates: strings from file
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:return: [np.ndarray]
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"""
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holes_points = []
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for hole_coordinates in holes_coordinates:
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hole_points = np.fromstring(hole_coordinates, dtype=float, sep=' ')
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hole_points = GeometryHelper.to_points_matrix(hole_points)
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holes_points.append(hole_points)
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return holes_points
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@staticmethod
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def _perimeter_points(coordinates, solid_points, holes_points) -> np.ndarray:
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"""
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Matrix of points of the perimeter in the same order as in coordinates [[x, y, z],[x, y, z],...]
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:parameter coordinates: string from file
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:parameter solid_points: np.ndarray points that define the solid part of a surface
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:parameter holes_points: [np.ndarray] points that define each the holes in a surface
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:return: np.ndarray
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"""
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if holes_points is None:
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perimeter_points = solid_points
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else:
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_perimeter_coordinates = coordinates
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for hole_points in holes_points:
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_hole = np.append(hole_points, hole_points[0])
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_closed_hole = ' '.join(str(e) for e in [*_hole[:]])
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# add a mark 'M' to ensure that the recombination of points does not provoke errors in finding holes
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_perimeter_coordinates = _perimeter_coordinates.replace(_closed_hole, 'M')
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_perimeter_coordinates = _perimeter_coordinates.replace('M', '')
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perimeter_points = np.fromstring(_perimeter_coordinates, dtype=float, sep=' ')
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perimeter_points = GeometryHelper.to_points_matrix(perimeter_points)
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# remove duplicated points
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pv = np.array([perimeter_points[0]])
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for point in perimeter_points:
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duplicated_point = False
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for p in pv:
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if GeometryHelper().almost_equal(0.0, p, point):
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duplicated_point = True
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if not duplicated_point:
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pv = np.append(pv, [point], axis=0)
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perimeter_points = pv
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return perimeter_points
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@staticmethod
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def _holes_polygons(holes_points) -> [Polygon]:
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"""
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hole surfaces, a list of hole polygons found in a surface
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:parameter holes_points: [np.ndarray] that define each of the holes
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:return: None, [] or [Polygon]
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None -> not known whether holes exist in reality or not due to low level of detail of input data
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[] -> no holes in the surface
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[Polygon] -> one or more holes in the surface
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"""
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if holes_points is None:
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holes_polygons = None
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else:
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holes_polygons = []
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for hole_points in holes_points:
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holes_polygons.append(Polygon(hole_points))
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return holes_polygons
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