GeoJSON FeatureCollection — это структура данных, используемая для хранения набора географических объектов в формате GeoJSON. Каждый объект в коллекции представляет собой определенный географический объект, например точку, линию или полигон. Вот несколько методов и примеров кода для работы с GeoJSON FeatureCollections:

1. Разбор коллекции объектов GeoJSON:

   import json
   def parse_feature_collection(geojson):
      data = json.loads(geojson)
      features = data['features']
      # Process each feature as needed
      for feature in features:
          # Access feature properties and geometry
          properties = feature['properties']
          geometry = feature['geometry']
          # Perform operations on each feature
          # ...
   # Example usage
   geojson = '{"type": "FeatureCollection", "features": [...]}'  # Replace [...] with actual features
   parse_feature_collection(geojson)

2. Перебор функций в FeatureCollection:

   def iterate_feature_collection(feature_collection):
      for feature in feature_collection['features']:
          # Access feature properties and geometry
          properties = feature['properties']
          geometry = feature['geometry']
          # Perform operations on each feature
          # ...
   # Example usage
   feature_collection = {
      "type": "FeatureCollection",
      "features": [
          {"type": "Feature", "properties": {...}, "geometry": {...}},
          {"type": "Feature", "properties": {...}, "geometry": {...}},
          # Add more features as needed
      ]
   }
   iterate_feature_collection(feature_collection)

3. Фильтрация объектов по свойствам:

   def filter_features_by_property(feature_collection, property_name, property_value):
      filtered_features = [feature for feature in feature_collection['features'] if
                           feature['properties'].get(property_name) == property_value]
      return filtered_features
   # Example usage
   feature_collection = {
      "type": "FeatureCollection",
      "features": [
          {"type": "Feature", "properties": {"name": "City A"}, "geometry": {...}},
          {"type": "Feature", "properties": {"name": "City B"}, "geometry": {...}},
          {"type": "Feature", "properties": {"name": "City C"}, "geometry": {...}},
      ]
   }
   filtered_features = filter_features_by_property(feature_collection, 'name', 'City B')
   print(filtered_features)

4. Извлечение геометрии из объектов:

   def extract_geometries(feature_collection):
      geometries = [feature['geometry'] for feature in feature_collection['features']]
      return geometries
   # Example usage
   feature_collection = {
      "type": "FeatureCollection",
      "features": [
          {"type": "Feature", "properties": {...}, "geometry": {...}},
          {"type": "Feature", "properties": {...}, "geometry": {...}},
          # Add more features as needed
      ]
   }
   geometries = extract_geometries(feature_collection)
   print(geometries)