Added TileExposure and ExportHandler classes

config_example.yml

@@ -14,9 +14,11 @@ geographic_selection:  # Selection of the geographic area for which GDE will be
     lon_e: 23.713597
     lat_s: 37.965450
     lat_n: 37.972561
+export_OBM_footprints: True  # If True, geometries of OBM buildings will be exported
 database_gde_tiles:  # Database where info on the GDE tiles is stored
     host: localhost
     dbname: gde_tiles_attica_2022_04_12_0900
     port: 5432
     username: tester
     password: somepass
+number_cores: 1  # Number of cores used for parallelisation

gdeexporter/configuration.py

@@ -88,6 +88,21 @@ class Configuration:
                         "lon_e" (float): East-most longitude.
                         "lat_s" (float): South-most latitude.
                         "lat_n" (float): North-most latitude.
+        self.cost_cases (dict):
+            Dictionary containing indications on the sort of costs to retrieve. The minimum
+            number of keys is one. The sort of costs that are available are: structural,
+            non_structural, contents and total. The keys are the names as they will appear in
+            the output, the values refer to the intrinsic naming in the model (i.e. the way
+            values are stored in the database).
+        self.people_cases (dict):
+            Dictionary containing indications on the time of the day for which the number of
+            people in the buildings is to be output. The minimum number of keys is one. The
+            available times of the day are: day, night, transit and census. The keys are the
+            names as they will appear in the output, the values refer to the intrinsic naming in
+            the model (i.e. the way values are stored in the database).
+        self.export_OBM_footprints (bool):
+            If True, the geometries of OpenBuildingMap buildings will be retrieved and exported,
+            if False, they will not.
         self.database_gde_tiles (dict):
             Dictionary containing the credentials needed to connect to the SQL database in which
             information on the GDE tiles is stored. The exact parameters needed depend on the
@@ -111,6 +126,8 @@ class Configuration:
                 - "bounding_box"
         self.number_quadkeys_to_process (int):
             Total number of quadkeys to process (from all keys of self.quadkeys_to_process).
+        self.number_cores (int):
+            Number of cores that will be used to run the code.
     """
 
     REQUIRES = [
@@ -119,7 +136,11 @@ class Configuration:
         "exposure_entities_to_run",
         "exposure_entities_code",
         "geographic_selection",
+        "cost_cases",
+        "people_cases",
+        "export_OBM_footprints",
         "database_gde_tiles",
+        "number_cores",
     ]
 
     def __init__(self, filepath, force_config_over_hierarchies=False):
@@ -171,6 +192,20 @@ class Configuration:
         )
         self.interpret_geographic_selection()
 
+        self.cost_cases = ConfigurationMethods.assign_hierarchical_parameters(
+            config, "cost_cases"
+        )
+        self.validate_cost_cases()
+
+        self.people_cases = ConfigurationMethods.assign_hierarchical_parameters(
+            config, "people_cases"
+        )
+        self.validate_people_cases()
+
+        self.export_OBM_footprints = ConfigurationMethods.assign_boolean_parameter(
+            config, "export_OBM_footprints"
+        )
+
         self.database_gde_tiles = ConfigurationMethods.retrieve_database_credentials(
             config,
             "database_gde_tiles",
@@ -179,6 +214,10 @@ class Configuration:
             force_config_over_hierarchies,
         )
 
+        self.number_cores = ConfigurationMethods.assign_integer_parameter(
+            config, "number_cores"
+        )
+
         self.quadkeys_to_process = None
         self.number_quadkeys_to_process = None
 
@@ -403,8 +442,15 @@ class Configuration:
                         "data_unit_tiles",
                     )
                 )
-                quadkeys_to_process[exposure_entity_code] = quadkeys_list
-                number_quadkeys += len(quadkeys_list)
+
+                if len(quadkeys_list) > 0:
+                    quadkeys_to_process[exposure_entity_code] = quadkeys_list
+                    number_quadkeys += len(quadkeys_list)
+                else:
+                    logger.info(
+                        "No quadkeys found for exposure entity '%s', skipping"
+                        % (exposure_entity_code)
+                    )
 
         if self.geographic_selection["selection_mode"].lower() == "data_unit_id":
             quadkeys_to_process = {}
@@ -418,8 +464,14 @@ class Configuration:
                         "data_unit_tiles",
                     )
                 )
-                quadkeys_to_process[data_unit_id] = quadkeys_list
-                number_quadkeys += len(quadkeys_list)
+
+                if len(quadkeys_list) > 0:
+                    quadkeys_to_process[data_unit_id] = quadkeys_list
+                    number_quadkeys += len(quadkeys_list)
+                else:
+                    logger.info(
+                        "No quadkeys found for data unit '%s', skipping" % (data_unit_id)
+                    )
 
         if self.geographic_selection["selection_mode"].lower() == "quadkeys":
             # Retrieve quadkeys from the indicated file
@@ -432,9 +484,16 @@ class Configuration:
                         quadkeys_list.append(element)
             f.close()
             quadkeys_list = list(dict.fromkeys(quadkeys_list))
-            quadkeys_to_process = {"quadkeys_list": quadkeys_list}
             number_quadkeys = len(quadkeys_list)
 
+            if len(quadkeys_list) > 0:
+                quadkeys_to_process = {"quadkeys_list": quadkeys_list}
+            else:
+                logger.info(
+                    "No quadkeys found in '%s'" % (self.geographic_selection["quadkeys_file"])
+                )
+                quadkeys_to_process = {}
+
         if self.geographic_selection["selection_mode"].lower() == "bounding_box":
             tiles = list(
                 mercantile.tiles(
@@ -445,11 +504,63 @@ class Configuration:
                     18,
                 )
             )
+
             quadkeys_list = list([mercantile.quadkey(tile) for tile in tiles])
-            quadkeys_to_process = {"bounding_box": quadkeys_list}
             number_quadkeys = len(quadkeys_list)
 
+            if len(quadkeys_list) > 0:
+                quadkeys_to_process = {"bounding_box": quadkeys_list}
+            else:
+                logger.info("No quadkeys found in bounding box")
+                quadkeys_to_process = {}
+
         self.quadkeys_to_process = quadkeys_to_process
         self.number_quadkeys_to_process = number_quadkeys
 
         return
+
+    def validate_cost_cases(self):
+        """
+        This function guarantees that the cost cases indicated as values of the self.cost_cases
+        dictionary are only those supported by this software. Currently supported values are:
+        "structural", "non_structural", "contents" and "total". If any other value is found, the
+        item is removed from self.cost_cases and a warning is logged.
+        """
+
+        valid_cost_cases = ["structural", "non_structural", "contents", "total"]
+
+        to_delete = []
+        for cost_case_key in self.cost_cases.keys():
+            if self.cost_cases[cost_case_key] not in valid_cost_cases:
+                logger.warning(
+                    "Invalid cost case found in configuration file: "
+                    "cost case '%s':'%s' will be ignored"
+                    % (cost_case_key, self.cost_cases[cost_case_key])
+                )
+                to_delete.append(cost_case_key)
+
+        for case_to_delete in to_delete:
+            del self.cost_cases[case_to_delete]
+
+    def validate_people_cases(self):
+        """
+        This function guarantees that the people cases indicated as values of the
+        self.people_cases dictionary are only those supported by this software. Currently
+        supported values are: "day", "night", "transit" and "census". If any other value is
+        found, the item is removedfrom self.people_cases and a warning is logged.
+        """
+
+        valid_people_cases = ["day", "night", "transit", "census", "average"]
+
+        to_delete = []
+        for people_case_key in self.people_cases.keys():
+            if self.people_cases[people_case_key] not in valid_people_cases:
+                logger.warning(
+                    "Invalid people case found in configuration file: "
+                    "people case '%s':'%s' will be ignored"
+                    % (people_case_key, self.people_cases[people_case_key])
+                )
+                to_delete.append(people_case_key)
+
+        for case_to_delete in to_delete:
+            del self.people_cases[case_to_delete]

gdeexporter/gdeexporter.py

@@ -18,8 +18,11 @@
 
 import logging
 import sys
+from multiprocessing import Pool
+from functools import partial
 from gdeexporter.configuration import Configuration
 from gdeexporter.database_queries import DatabaseQueries
+from gdeexporter.handler import ExportHandler
 
 # Add a logger printing error, warning, info and debug messages to the screen
 logger = logging.getLogger()
@@ -78,11 +81,25 @@ def main():
 
     logger.info("%s quadkeys will be processed" % (config.number_quadkeys_to_process))
 
-    for quadkeys_group in config.quadkeys_to_process.keys():
-        logger.info(
-            "Processing of %s quadkeys from quadkey group '%s' has started"
-            % (len(config.quadkeys_to_process[quadkeys_group]), quadkeys_group)
+    # Create groups of quadkey groups and occupancies, so as to parallelise
+    if config.number_quadkeys_to_process > 0:
+        quadkeys_occupancy_groups = [
+            (quadkeys_group, occupancy_case)
+            for quadkeys_group in config.quadkeys_to_process.keys()
+            for occupancy_case in config.occupancies_to_run
+        ]
+
+        p = Pool(processes=config.number_cores)
+        func = partial(
+            ExportHandler.process_quadkey_occupancy_group,
+            config,
+            aggregated_source_id,
         )
+        summary_values = p.map(func, quadkeys_occupancy_groups)
+        p.close()
+        p.join()
+
+        print(summary_values)
 
     # Leave the program
     logger.info("gde-exporter has finished")

gdeexporter/handler.py

+#!/usr/bin/env python3
+
+# Copyright (C) 2022:
+#   Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or (at
+# your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see http://www.gnu.org/licenses/.
+
+import logging
+from gdeexporter.tileexposure import TileExposure
+from gdeexporter.database_queries import DatabaseQueries
+
+
+logger = logging.getLogger()
+
+
+class ExportHandler:
+    """This class handles the main processing activities of the gde-exporter."""
+
+    @staticmethod
+    def process_quadkey_occupancy_group(config, aggregated_source_id, group_attributes):
+        """
+        This function processes a particular quadkey group and occupancy case, both of which are
+        passed as arguments under 'group_attributes', to enable parallelisation.
+
+        Args:
+            config (Configuration):
+                Instance of the gdeexporter.configuration.Configuration class.
+            aggregated_source_id (int):
+                ID of the source of the aggregated exposure model for which the processing will
+                take place.
+            group_attributes (tuple of (quadkeys_group, occupancy_case)):
+                Tuple with two elements:
+                    quadkeys_group:
+                        Name of the quadkey group for which the processing will take place. It
+                        needs to be a key of the config.quadkeys_to_process dictionary. The
+                        content of config.quadkeys_to_process[quadkeys_group] is a list of
+                        quadkeys.
+                    occupancy_case (str):
+                        Occupancy case for which the processing will take place.
+
+        Returns:
+            summary_values (dict):
+                Dictionary summarising the number of buildings processed for the input quadkey
+                group and occupancy case, with the following keys:
+                    processed_quadkeys (int):
+                        Number of quadkeys processed (includes quadkeys with no buildings).
+                    OBM_buildings (int):
+                        Number of GDE-processed OBM buildings.
+                    aggregated_buildings (float):
+                        Number of aggregated buildings.
+                    remainder_buildings (float):
+                        Number of remainder buildings.
+                    total_buildings (float):
+                        Number of total buildings (remainder plus OBM).
+        """
+
+        quadkeys_group = group_attributes[0]
+        occupancy_case = group_attributes[1]
+
+        logger.info(
+            "Processing of %s quadkeys from group '%s' and occupancy case '%s' has started"
+            % (len(config.quadkeys_to_process[quadkeys_group]), quadkeys_group, occupancy_case)
+        )
+
+        summary_values = {}
+        summary_values["processed_quadkeys"] = 0
+        summary_values["OBM_buildings"] = 0
+        summary_values["aggregated_buildings"] = 0.0
+        summary_values["remainder_buildings"] = 0.0
+        summary_values["total_buildings"] = 0.0
+
+        for quadkey in config.quadkeys_to_process[quadkeys_group]:
+            quadtile = TileExposure(quadkey, config.cost_cases, config.people_cases)
+
+            if config.geographic_selection["selection_mode"].lower() == "data_unit_id":
+                data_unit_ids = [quadkeys_group]
+            else:
+                data_unit_ids = DatabaseQueries.retrieve_data_unit_ids(
+                    quadkey,
+                    aggregated_source_id,
+                    config.exposure_entities_to_run,
+                    occupancy_case,
+                    config.database_gde_tiles,
+                    "data_unit_tiles",
+                )
+
+            for data_unit_id in data_unit_ids:
+                # Retrieve building classes associated with this data unit, occupancy case and
+                # aggregated source ID
+                building_classes = DatabaseQueries.get_building_classes_of_data_unit(
+                    data_unit_id,
+                    occupancy_case,
+                    aggregated_source_id,
+                    config.database_gde_tiles,
+                    "data_units_buildings",
+                )
+
+                exposure_entity_code = data_unit_id[:3]
+                # Retrieve cost assumptions
+                cost_assumptions = DatabaseQueries.get_exposure_entities_costs_assumptions(
+                    config.cost_cases,
+                    exposure_entity_code,
+                    occupancy_case,
+                    aggregated_source_id,
+                    config.database_gde_tiles,
+                    "exposure_entities_costs_assumptions",
+                )
+                # Retrieve distribution of people at different times of the day
+                people_distribution = (
+                    DatabaseQueries.get_exposure_entities_population_time_distribution(
+                        config.people_cases,
+                        exposure_entity_code,
+                        occupancy_case,
+                        aggregated_source_id,
+                        config.database_gde_tiles,
+                        "exposure_entities_population_time_distribution",
+                    )
+                )
+
+                # Retrieve number of aggregated, OBM and remainder buildings in the tile
+                (
+                    number_aggregated,
+                    number_obm,
+                    number_remainder,
+                ) = DatabaseQueries.get_numbers_buildings_for_data_unit_tile(
+                    quadkey,
+                    aggregated_source_id,
+                    occupancy_case,
+                    data_unit_id,
+                    config.database_gde_tiles,
+                    "data_unit_tiles",
+                )
+                if number_aggregated < -1.0 or number_obm < -1.0 or number_remainder < -1.0:
+                    logger.error(
+                        "get_numbers_buildings_for_data_unit_tile could not retrieve number "
+                        "of aggregated, remainder and OBM buildings for quadkey = '%s' and "
+                        "data unit ID = '%s'" % (quadkey, data_unit_id)
+                    )
+
+                # Append aggregated buildings to quadtile.aggregated_buildings
+                if number_aggregated > 1e-6:  # If smaller, consider equal to zero
+                    quadtile.append_lumped_buildings(
+                        "aggregated_buildings",
+                        building_classes,
+                        number_aggregated,
+                        cost_assumptions,
+                        people_distribution,
+                        data_unit_id,
+                    )
+
+                # Append remainder buildings to quadtile.remainder_buildings
+                if number_remainder > 1e-6:  # If smaller, consider equal to zero
+                    quadtile.append_lumped_buildings(
+                        "remainder_buildings",
+                        building_classes,
+                        number_remainder,
+                        cost_assumptions,
+                        people_distribution,
+                        data_unit_id,
+                    )
+
+                # Retrieve OBM buildings
+                obm_buildings, obm_geometries = DatabaseQueries.get_GDE_buildings(
+                    quadkey,
+                    data_unit_id,
+                    occupancy_case,
+                    aggregated_source_id,
+                    config.export_OBM_footprints,
+                    config.database_gde_tiles,
+                    "gde_buildings",
+                )
+
+                if obm_buildings.shape[0] > 0:
+                    # Append OBM buildings to quadtile.obm_buildings
+                    quadtile.append_OBM_buildings(
+                        obm_buildings,
+                        building_classes,
+                        cost_assumptions,
+                        people_distribution,
+                        data_unit_id,
+                    )
+
+                    # Append obm_geometries to quadtile.obm_buildings_geometries (dictionary)
+                    quadtile.obm_buildings_geometries.update(obm_geometries)
+
+            # Add to summary values
+            summary_values["aggregated_buildings"] += (
+                quadtile.aggregated_buildings["number"].to_numpy().sum()
+            )
+            summary_values["remainder_buildings"] += (
+                quadtile.remainder_buildings["number"].to_numpy().sum()
+            )
+            summary_values["total_buildings"] += (
+                quadtile.total_buildings["number"].to_numpy().sum()
+            )
+            summary_values["OBM_buildings"] += quadtile.obm_buildings["number"].to_numpy().sum()
+
+        summary_values["processed_quadkeys"] += len(config.quadkeys_to_process[quadkeys_group])
+
+        return summary_values

gdeexporter/tileexposure.py

+#!/usr/bin/env python3
+
+# Copyright (C) 2022:
+#   Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or (at
+# your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero
+# General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see http://www.gnu.org/licenses/.
+
+import logging
+import pandas
+from copy import deepcopy
+
+
+logger = logging.getLogger()
+
+# Empty DataFrame
+BUILDINGS = pandas.DataFrame(
+    {
+        "building_class_name": pandas.Series(dtype="str"),
+        "number": pandas.Series(dtype="float"),
+        "data_unit_id": pandas.Series(dtype="str"),
+    }
+)
+
+
+class TileExposure:
+    """This class represents the exposure of a tile of zoom level 18.
+
+    Attributes:
+        self.quadkey (str):
+            Quadkey of the zoom level 18 tile.
+        self.obm_buildings (Pandas DataFrame):
+            DataFrame with the OBM buildings that belong to the tile, in terms of:
+                osm_id (int):
+                    OpenStreetMap ID of the building.
+                building_class_name (str):
+                    Name of the building class as per the GEM Building Taxonomy v3.0.
+                number (float):
+                    Probability of the building (identified by its OSM ID) belonging to the
+                    building class.
+                Columns associated with building replacement costs (float):
+                    Names and contents are user-defined. Values correspond to values per
+                    building multiplied by the probability of the building class corresponding
+                    to the particular building (identified by its OSM ID).
+                Columns associated with the number of people in the building at different times
+                of the day (float):
+                    Names and contents are user-defined. Values correspond to values per
+                    building multiplied by the probability of the building class corresponding
+                    to the particular building (identified by its OSM ID).
+                data_unit_id (str):
+                    ID of the data unit the building belongs to.
+        self.obm_buildings_geometries (dict):
+            Dictionary in which each key is a unique 'osm_id' from self.obm_buildings, with the
+            following subkeys:
+                centroid (str):
+                    Centroid of the OBM building in Well-Known Text format.
+                footprint (str) (only if instructed to retrieve footprints by the user):
+                    Footprint of the OBM building in Well-Known Text format.
+        self.remainder_buildings (Pandas DataFrame):
+            DataFrame with the remainder buildings that belong to the tile, in terms of:
+                building_class_name (str):
+                    Name of the building class as per the GEM Building Taxonomy v3.0.
+                number (float):
+                    Number of buildings of this building class.
+                Columns associated with building replacement costs (float):
+                    Names and contents are user-defined. Values correspond to values per
+                    building multiplied by the number of buildings of the class.
+                Columns associated with the number of people in the building at different times
+                of the day (float):
+                    Names and contents are user-defined. Values correspond to values per
+                    building multiplied by the number of buildings of the class.
+                data_unit_id (str):
+                    ID of the data unit the buildings belong to.
+        self.aggregated_buildings (Pandas DataFrame):
+            DataFrame with the remainder buildings that belong to the tile, in terms of the same
+            fields described for self.remainder_buildings.
+        self.total_buildings (Pandas DataFrame):
+            DataFrame with the total buildings that belong to the tile (aggregation of remainder
+            and OBM buildings), in terms of the same fields described for
+            self.remainder_buildings.
+    """
+
+    def __init__(self, quadkey, cost_cases, people_cases):
+        """
+        Args:
+            quadkey (str):
+                Quadkey of the zoom level 18 tile.
+            cost_cases (dict):
+                Dictionary containing indications on the sort of costs to output.
+            people_cases (dict):
+                Dictionary containing indications on the time of the day for which the number of
+                people in the buildings is to be output.
+        """
+
+        self.quadkey = quadkey
+        self.obm_buildings = self._create_empty_building_dataframes(
+            cost_cases, people_cases, additional_cols={"osm_id": "str"}
+        )
+        self.obm_buildings_geometries = {}
+        self.remainder_buildings = self._create_empty_building_dataframes(
+            cost_cases, people_cases
+        )
+        self.aggregated_buildings = self._create_empty_building_dataframes(
+            cost_cases, people_cases
+        )
+        self.total_buildings = self._create_empty_building_dataframes(cost_cases, people_cases)
+
+    def _create_empty_building_dataframes(self, cost_cases, people_cases, additional_cols={}):
+        """
+        Args:
+            cost_cases (dict):
+                Dictionary containing indications on the sort of costs to output.
+            people_cases (dict):
+                Dictionary containing indications on the time of the day for which the number of
+                people in the buildings is to be output.
+            additional_cols (dict):
+                Dictionary containing names (keys) and data types (values) of any other column
+                that the output is required to have.
+        """
+
+        empty_buildings = deepcopy(BUILDINGS)
+        for cost_case in cost_cases:
+            empty_buildings[cost_case] = pandas.Series(dtype="float")
+        for people_case in people_cases:
+            empty_buildings[people_case] = pandas.Series(dtype="float")
+        for col in additional_cols:
+            empty_buildings[col] = pandas.Series(dtype=additional_cols[col])
+
+        return empty_buildings
+
+    def append_lumped_buildings(
+        self,
+        lumped_building_case,
+        building_classes,
+        number_buildings,
+        cost_assumptions,
+        people_distribution,
+        data_unit_id,
+    ):
+        """
+        This function appends buildings to the case of lumped buildings indicated by
+        'lumped_building_case', which can be either "aggregated_buildings" or
+        "remainder_buildings". The building classes and their proportions are as indicated in
+        'building_classes' and the total number of aggregated or remainder buildings is
+        indicated by 'number_buildings'. The dictionaries 'cost_assumptions' and
+        'people_distribution' indicate the desired disaggregation of replacement costs and
+        distribution of people at different times of the day. The output costs and number of
+        people correspond to the total number of buildings.
+