""" CityGml module parses citygml files and import the geometry into the city model structure SPDX - License - Identifier: LGPL - 3.0 - or -later Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca """ import numpy as np import xmltodict from city_model_structure.city import City from city_model_structure.building import Building from city_model_structure.surface import Surface from helpers.geometry_helper import GeometryHelper from datetime import datetime class CityGml: """ CityGml class """ def __init__(self, path): start = datetime.utcnow() self._city = None with open(path) as gml: # Clean the namespaces is an important task to prevent wrong ns:field due poor citygml implementations self._gml = xmltodict.parse(gml.read(), process_namespaces=True, xml_attribs=True, namespaces={ 'http://www.opengis.net/gml': None, 'http://www.opengis.net/citygml/1.0': None, 'http://www.opengis.net/citygml/building/1.0': None, 'http://schemas.opengis.net/citygml/building/1.0/building.xsd': None, 'http://www.opengis.net/citygml/appearance/1.0': None, 'http://schemas.opengis.net/citygml/appearance/1.0/appearance.xsd': None, 'http://www.opengis.net/citygml/relief/1.0': None, 'http://schemas.opengis.net/citygml/relief/1.0/relief.xsd': None, 'http://www.opengis.net/citygml/generics/1.0': None, 'http://www.w3.org/2001/XMLSchema-instance': None, 'urn:oasis:names:tc:ciq:xsdschema:xAL:2.0': None, 'http://www.w3.org/1999/xlink': None, 'http://www.opengis.net/citygml/relief/2.0': None, 'http://www.opengis.net/citygml/building/2.0': None, 'http://www.opengis.net/citygml/building/2.0 http://schemas.opengis.net/citygml/building/2.0/building.xsd ' 'http://www.opengis.net/citygml/relief/2.0 http://schemas.opengis.net/citygml/relief/2.0/relief.xsd" ' 'xmlns="http://www.opengis.net/citygml/2.0': None, 'http://www.opengis.net/citygml/2.0': None }, force_list=('cityObjectMember', 'curveMember', 'boundedBy', 'surfaceMember')) self._city_objects = None self._geometry = GeometryHelper() for bound in self._gml['CityModel']['boundedBy']: envelope = bound['Envelope'] if '#text' in envelope['lowerCorner']: self._lower_corner = np.fromstring(envelope['lowerCorner']['#text'], dtype=float, sep=' ') self._upper_corner = np.fromstring(envelope['upperCorner']['#text'], dtype=float, sep=' ') else: self._lower_corner = np.fromstring(envelope['lowerCorner'], dtype=float, sep=' ') self._upper_corner = np.fromstring(envelope['upperCorner'], dtype=float, sep=' ') self._srs_name = envelope['@srsName'] print('city_gml constructor', datetime.utcnow() - start) @property def content(self): """ CityGml raw content :return: str """ return self._gml @property def city(self) -> City: """ City model structure enriched with the geometry information :return: City """ if self._city is None: self._city = City(self._lower_corner, self._upper_corner, self._srs_name) i = 0 for o in self._gml['CityModel']['cityObjectMember']: i += 1 print('add city object', i) lod = 0 surfaces = [] if 'lod1Solid' in o['Building']: lod += 1 surfaces = self._lod1(o) for bound in o['Building']['boundedBy']: surface_type = next(iter(bound)) if 'lod2MultiSurface' in bound[surface_type]: start = datetime.utcnow() lod = 2 surfaces = CityGml._lod2(bound) print('lod2 ', surface_type, datetime.utcnow() - start) if 'lod3Solid' in o['Building']: lod += 4 if 'lod4Solid' in o['Building']: lod += 8 name = o['Building']['@id'] lod_terrain_str = 'lod' + str(lod) + 'TerrainIntersection' terrains = [] if lod_terrain_str in o['Building']: terrains = self._terrains(o, lod_terrain_str) year_of_construction = None function = None if 'yearOfConstruction' in o['Building']: year_of_construction = o['Building']['yearOfConstruction'] if 'function' in o['Building']: function = o['Building']['function'] self._city.add_city_object(Building(name, lod, surfaces, terrains, year_of_construction, function, self._lower_corner)) return self._city def _terrains(self, city_object, lod_terrain_str): try: curves = [c['LineString']['posList']['#text'] for c in city_object['Building'][lod_terrain_str]['MultiCurve']['curveMember']] except TypeError: curves = [c['LineString']['posList'] for c in city_object['Building'][lod_terrain_str]['MultiCurve']['curveMember']] terrains = [] for curve in curves: curve_points = np.fromstring(curve, dtype=float, sep=' ') curve_points = self._geometry.to_points_matrix(curve_points, True) terrains.append(curve_points) return terrains def _lod1(self, o): try: surfaces = [Surface(s['Polygon']['exterior']['LinearRing']['posList']['#text']) for s in o['Building']['lod1Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']] except TypeError: surfaces = [Surface(s['Polygon']['exterior']['LinearRing']['posList']) for s in o['Building']['lod1Solid']['Solid']['exterior']['CompositeSurface']['surfaceMember']] terrains = [] for s in surfaces: ground = True ground_points = [] for row in s.points: # all surface vertex are in the lower z ground_point = [row[0], row[1], self._lower_corner[2]] ground_points = np.concatenate((ground_points, ground_point), axis=None) ground = ground and self._geometry.almost_equal(row, ground_point) if ground: ground_points = self._geometry.to_points_matrix(ground_points) # Do i need to remove the duplicated? terrains.append(ground_points) return surfaces @staticmethod def _lod2(bound): surfaces = [] for surface_type in iter(bound): for s in bound[surface_type]['lod2MultiSurface']['MultiSurface']['surfaceMember']: try: surfaces = [Surface(s['Polygon']['exterior']['LinearRing']['posList']['#text'], surface_type=GeometryHelper.gml_surface_to_libs(surface_type)) for s in bound[surface_type]['lod2MultiSurface']['MultiSurface']['surfaceMember']] except TypeError: surfaces = [Surface(s['Polygon']['exterior']['LinearRing']['posList'], surface_type=GeometryHelper.gml_surface_to_libs(surface_type)) for s in bound[surface_type]['lod2MultiSurface']['MultiSurface']['surfaceMember']] print(len(surfaces), 'surfaces') return surfaces