Compose road/rail networks from multiple OSM extracts

config/composite_network/south-east-asia-rail.csv

@@ -0,0 +1,5 @@
+infrastructure_dataset,network_filter
+thailand-latest,rail
+laos-latest,rail
+cambodia-latest,rail
+myanmar-latest,rail

config/composite_network/south-east-asia-road.csv

@@ -0,0 +1,5 @@
+infrastructure_dataset,network_filter
+thailand-latest,road-secondary
+laos-latest,road-primary
+cambodia-latest,road-primary
+myanmar-latest,road-primary

config/config.yaml

@@ -1,24 +1,13 @@
-#####################################
-### FLOODING / TRANSPORT WORKFLOW ###
-#####################################
-
-## Aqueduct Analysis ##
-# This should be a named list of files that specify hazard raster files
-# to retrieve using wget -i
-hazard_datasets:
-  aqueduct-coast: 'https://raw.githubusercontent.com/mjaquiery/aqueduct/main/tiffs.txt'
-  #aqueduct-coast: 'config/hazard_resource_locations/aqueduct-coast_wtsub_perc95.txt'
-  #aqueduct-river: 'config/hazard_resource_locations/aqueduct-river_rcp4p5_MIROC-ESM-CHEM_2030_tifs.txt'  # subset of aqueduct_tifs.txt
-  aqueduct-river: 'config/hazard_resource_locations/aqueduct-river.txt'
-  jba-event: 'config/hazard_resource_locations/jba-events.txt'
-
-hazard_types:
-  aqueduct-coast: 'flood'
-  aqueduct-river: 'flood'
-  jba-event: 'flood'
+##########################
+### TRANSPORT WORKFLOW ###
+##########################
 
 # OSM datasets in PBF format, principally from: https://download.geofabrik.de/ #
 infrastructure_datasets:
+  # note that there is a JSON index with country ISO-A2 codes here:
+  # https://download.geofabrik.de/index-v1-nogeom.json
+  # we could do lookup from ISO code to URL using this file, to avoid registering URLs here
+  #
   # whole planet file
   planet-latest: 'https://planet.osm.org/pbf/planet-latest.osm.pbf'
   # 'continent' extracts
@@ -30,31 +19,68 @@ infrastructure_datasets:
   north-america-latest: 'http://download.geofabrik.de/north-america-latest.osm.pbf'
   south-america-latest: 'http://download.geofabrik.de/south-america-latest.osm.pbf'
   # country extracts
+  bangladesh-latest: 'https://download.geofabrik.de/asia/bangladesh-latest.osm.pbf'
+  cambodia-latest: 'https://download.geofabrik.de/asia/cambodia-latest.osm.pbf'
+  china-latest: 'https://download.geofabrik.de/asia/china-latest.osm.pbf'
   djibouti-latest: 'https://download.geofabrik.de/africa/djibouti-latest.osm.pbf'
   egypt-latest: 'http://download.geofabrik.de/africa/egypt-latest.osm.pbf'
   great-britain-latest: 'http://download.geofabrik.de/europe/great-britain-latest.osm.pbf'
+  india-latest: 'https://download.geofabrik.de/asia/india-latest.osm.pbf'
   jamaica-latest: 'http://download.geofabrik.de/central-america/jamaica-latest.osm.pbf'
   kenya-latest: 'http://download.geofabrik.de/africa/kenya-latest.osm.pbf'
+  laos-latest: 'https://download.geofabrik.de/asia/laos-latest.osm.pbf'
+  myanmar-latest: 'https://download.geofabrik.de/asia/myanmar-latest.osm.pbf'
   tanzania-latest: 'https://download.geofabrik.de/africa/tanzania-latest.osm.pbf'
   thailand-latest: 'https://download.geofabrik.de/asia/thailand-latest.osm.pbf'
   wales-latest: 'https://download.geofabrik.de/europe/great-britain/wales-latest.osm.pbf'
+  vietnam-latest: 'https://download.geofabrik.de/asia/vietnam-latest.osm.pbf'
   # small extract for testing purposes
   tanzania-mini: 'https://raw.githubusercontent.com/mjaquiery/aqueduct/main/tanzania-mini.osm.pbf'
 
 # these files contain osmium filter expressions for selecting relevant nodes, ways and relations from .osm.pbf files
 # the keys in the mapping, i.e. 'road' and 'rail' will be used to create FILTER_SLUG in rules
 network_filters:
-  road: 'config/osm_filters/road-residential.txt'
+  road-residential: 'config/osm_filters/road-residential.txt'
+  road-tertiary: 'config/osm_filters/road-tertiary.txt'
+  road-secondary: 'config/osm_filters/road-secondary.txt'
+  road-primary: 'config/osm_filters/road-primary.txt'
   rail: 'config/osm_filters/rail.txt'
 
+# define a set of partial transport networks to create and interconnect
+# file should be a CSV with `infrastructure_dataset` and `network_filters` columns (with header)
+# e.g.
+# infrastructure_dataset,network_filter
+# thailand-latest,road-secondary
+# cambodia-latest,road-primary
+# laos-latest,road-primary
+composite_network:
+  south-east-asia-road: 'config/composite_network/south-east-asia-road.csv'
+  south-east-asia-rail: 'config/composite_network/south-east-asia-rail.csv'
+
 # OSM tag data to retain on selected features, typically for usage in network annotation/analysis
 # N.B. feature SELECTION is done with the expressions pointed to from network_filters
 keep_tags:
   road: ['highway', 'surface', 'bridge', 'maxspeed', 'lanes']
   rail: ['railway', 'bridge', 'name', 'gauge', 'usage']
 
 # Number of slices to cut dataset into -- must be a square number
-slice_count: 4
+slice_count: 64
+
+
+#########################
+### FLOODING WORKFLOW ###
+#########################
+
+hazard_datasets:
+  # hazard rasters to retrieve
+  aqueduct-coast: 'config/hazard_resource_locations/aqueduct-coast_wtsub_perc95.txt'
+  aqueduct-river: 'config/hazard_resource_locations/aqueduct-river.txt'
+  jba-event: 'config/hazard_resource_locations/jba-events.txt'
+
+hazard_types:
+  aqueduct-coast: 'flood'
+  aqueduct-river: 'flood'
+  jba-event: 'flood'
 
 direct_damages:
   # assets to calculate direct damages for

config/osm_filters/road-primary.txt

@@ -0,0 +1 @@
+w/highway=motorway,motorway_link,trunk,trunk_link,primary,primary_link

environment.yml

@@ -19,6 +19,8 @@ dependencies:
   - cython==0.29.28     # c--python interface
   - contextily          # basemaps for plots
   - datashader          # plotting large datasets
+  # test_grid_exposure_by_admin_region.py fails with 2024.3.0
+  - dask<2024.3.0       # larger-than-memory computing
   - flake8              # linter
   - gdal>=3.3           # command-line tools for spatial data
   - geopandas==0.14.1   # geospatial dataframes

src/open_gira/network.py

@@ -77,10 +77,4 @@ def create_network(
     logging.info("Creating network topology")
     network = snkit.network.add_topology(network, id_col="id")
 
-    network.edges.rename(
-        columns={"from_id": "from_node_id", "to_id": "to_node_id", "id": "edge_id"},
-        inplace=True,
-    )
-    network.nodes.rename(columns={"id": "node_id"}, inplace=True)
-
     return network

tests/config/config.yaml

@@ -32,7 +32,7 @@ infrastructure_datasets:
 # these files contain osmium filter expressions for selecting relevant nodes, ways and relations from .osm.pbf files
 # the keys in the mapping, i.e. 'road' and 'rail' will be used to create FILTER_SLUG in rules
 network_filters:
-  road: 'config/osm_filters/road-secondary.txt'
+  road-secondary: 'config/osm_filters/road-secondary.txt'
   rail: 'config/osm_filters/rail.txt'
 
 # OSM tag data to retain on selected features, typically for usage in network annotation/analysis

tests/integration/test_filter_osm_data.py

@@ -5,6 +5,6 @@ def test_filter_osm_data():
     runner.run_snakemake_test(
         "filter_osm_data",
         (
-            "results/input/OSM/djibouti-latest_filter-road.osm.pbf",
+            "results/input/OSM/djibouti-latest_filter-road-secondary.osm.pbf",
         )
     )

tests/integration/test_join_network.py

@@ -5,7 +5,7 @@ def test_join_network():
     runner.run_snakemake_test(
         "join_network",
         (
-            "results/djibouti-latest_filter-road/nodes.geoparquet",
-            "results/djibouti-latest_filter-road/edges.geoparquet",
+            "results/djibouti-latest_filter-road/nodes.gpq",
+            "results/djibouti-latest_filter-road/edges.gpq",
         )
     )

workflow/Snakefile

@@ -76,6 +76,11 @@ if not config["best_estimate_windspeed_failure_threshold"] in config["transmissi
 
 # Constrain wildcards to NOT use _ or /
 wildcard_constraints:
+    # the output dir must end in 'results'
+    # e.g. '/data/open-gira/results', './results', '/my-results', etc.
+    # this prevents us matching past it into other folders for an incorrect OUTPUT_DIR,
+    # but is more flexible than reading a value from, for example, config.yaml
+    OUTPUT_DIR="^.*results",
     DATASET="[^_/]+",
     SLICE_SLUG="slice-[0-9]+",
     FILTER_SLUG="filter-[^_/]+",

workflow/power-tc/grid_exposure_by_admin_region.py

@@ -62,6 +62,21 @@
     exposure_by_event = dask.dataframe.read_parquet(snakemake.input.exposure_by_event)
 
     # calculate number of years between first and last storm event, necessary for expected annual exposure
+
+    # N.B. dask==2024.3.0 breaks the line assigning to event_ids -- the index will not resolve to values
+
+    # pytest -s tests/integration/test_exposure_by_admin_region.py
+
+    # the following seems to know about the index values, look at the repr str..!
+    # (Pdb) exposure_by_event.index.compute()
+    # Empty DataFrame
+    # Columns: []
+    # Index: [2007345N18298, ..., 2022255N15324]
+
+    # but actually try and access those values ...
+    # (Pdb) exposure_by_event.index.compute().values
+    # array([], shape=(10, 0), dtype=float64)
+
     event_ids: list[str] = list(set(exposure_by_event.index))
     years: set[int] = set(track_year.loc[event_ids, "year"])
     span_years: int = max([1, max(years) - min(years)])  # with a minimum of one
@@ -102,4 +117,4 @@
 
     # write out to disk
     logging.info("Writing out with region geometry")
-    gpd.GeoDataFrame(exposure_with_length).to_parquet(snakemake.output.expected_annual_exposure)
+    gpd.GeoDataFrame(exposure_with_length).to_parquet(snakemake.output.expected_annual_exposure)

workflow/power-tc/network_components.smk

@@ -1,7 +1,7 @@
 rule network_components:
     input:
-        nodes="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/nodes.geoparquet",
-        edges="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/edges.geoparquet",
+        nodes="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/nodes.gpq",
+        edges="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/edges.gpq",
     output:
         component_population="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/component_population.svg",
         component_map="{OUTPUT_DIR}/{DATASET}_{FILTER_SLUG}/network_map_by_component.png",

workflow/transport-flood/flood_damages.smk

@@ -8,7 +8,7 @@ rule return_period_direct_damages:
     input:
         unsplit = rules.create_transport_network.output.edges,  # for pre-intersection geometry
         exposure = rules.rasterise_osm_network.output.geoparquet,
-        rehab_cost=lambda wildcards: f"config/rehab_costs/{wildcards.FILTER_SLUG.replace('filter-', '')}.csv",
+        rehab_cost=lambda wildcards: f"config/rehab_costs/{wildcards.FILTER_SLUG.split('-')[1]}.csv",
         damage_curves="config/damage_curves/",
     output:
         damage_fraction = "{OUTPUT_DIR}/direct_damages/{DATASET}_{FILTER_SLUG}/{HAZARD_SLUG}/fraction_per_RP/{SLICE_SLUG}.geoparquet",
@@ -25,7 +25,7 @@ rule return_period_direct_damages:
 
 """
 Test with:
-snakemake --cores 1 results/direct_damages/egypt-latest_filter-road/hazard-aqueduct-river/EAD_and_cost_per_RP/slice-5.geoparquet
+snakemake --cores 1 results/direct_damages/egypt-latest_filter-road-tertiary/hazard-aqueduct-river/EAD_and_cost_per_RP/slice-5.geoparquet
 """
 
 
@@ -47,20 +47,20 @@ rule event_set_direct_damages:
     input:
         unsplit = rules.create_transport_network.output.edges,  # for pre-intersection geometry
         exposure = rules.rasterise_osm_network.output.geoparquet,
-        rehab_cost=lambda wildcards: f"config/rehab_costs/{wildcards.FILTER_SLUG.replace('filter-', '')}.csv",
+        rehab_cost=lambda wildcards: f"config/rehab_costs/{wildcards.FILTER_SLUG.split('-')[1]}.csv",
         damage_curves="config/damage_curves/",
     output:
         damage_fraction = "{OUTPUT_DIR}/direct_damages/{DATASET}_{FILTER_SLUG}/{HAZARD_SLUG}/fraction/{SLICE_SLUG}.gpq",
         damage_cost = "{OUTPUT_DIR}/direct_damages/{DATASET}_{FILTER_SLUG}/{HAZARD_SLUG}/cost/{SLICE_SLUG}.gpq",
     params:
-        network_type=lambda wildcards: wildcards.FILTER_SLUG.replace('filter-', ''),
+        network_type=lambda wildcards: wildcards.FILTER_SLUG.split('-')[1],
         hazard_type=lambda wildcards: config["hazard_types"][wildcards.HAZARD_SLUG.replace('hazard-', '')]
     script:
         "./event_set_direct_damages.py"
 
 """
 Test with:
-snakemake --cores 1 results/direct_damages/thailand-latest_filter-road/hazard-jba-event/cost/slice-5.gpq
+snakemake --cores 1 results/direct_damages/thailand-latest_filter-road-primary/hazard-jba-event/cost/slice-5.gpq
 """
 
 
@@ -92,4 +92,4 @@ rule concat_event_set_direct_damages:
 """
 Test with:
 snakemake -c1 results/direct_damages/thailand-latest_filter-road/hazard-jba-event/cost.gpq
-"""
+"""

workflow/transport/create_network.smk

@@ -1,3 +1,14 @@
+"""
+Generic network creation rules.
+"""
+
+
+import logging
+
+import geopandas as gpd
+import pandas as pd
+
+import snkit
 
 
 rule create_transport_network:
@@ -13,7 +24,8 @@ rule create_transport_network:
         edges="{OUTPUT_DIR}/geoparquet/{DATASET}_{FILTER_SLUG}/processed/{SLICE_SLUG}_edges.geoparquet"
     params:
         # determine the network type from the filter, e.g. road, rail
-        network_type=lambda wildcards: wildcards.FILTER_SLUG.replace('filter-', ''),
+        # example FILTER_SLUG values might be 'filter-road-tertiary' or 'filter-rail'
+        network_type=lambda wildcards: wildcards.FILTER_SLUG.split('-')[1],
         # pass in the slice number so we can label edges and nodes with their slice
         # edge and node IDs should be unique across all slices
         slice_number=lambda wildcards: int(wildcards.SLICE_SLUG.replace('slice-', ''))
@@ -25,3 +37,64 @@ rule create_transport_network:
 Test with:
 snakemake --cores all results/geoparquet/tanzania-mini_filter-road/processed/slice-0_edges.geoparquet
 """
+
+
+def transport_network_paths_from_file(wildcards) -> list[str]:
+    """
+    Lookup composite network components from file and return list of paths to
+    their edge files.
+    """
+    df = pd.read_csv(
+        config["composite_network"][wildcards.COMPOSITE],
+        comment="#",
+    )
+    edge_paths = df.apply(
+        lambda row:
+        f"{wildcards.OUTPUT_DIR}/{row.infrastructure_dataset}_filter-{row.network_filter}/edges.gpq",
+        axis=1
+    )
+    node_paths = [path.replace("edges.gpq", "nodes.gpq") for path in edge_paths]
+    return {"component_nodes": node_paths, "component_edges": edge_paths}
+
+
+rule create_composite_transport_network:
+    """
+    Stitch together a set of transport networks into one file. These should be
+    the same transport mode. May be used for creating networks of spatially
+    varying density.
+    """
+    input:
+        unpack(transport_network_paths_from_file)
+    output:
+        composite_nodes = "{OUTPUT_DIR}/composite_network/{COMPOSITE}/nodes.gpq",
+        composite_edges = "{OUTPUT_DIR}/composite_network/{COMPOSITE}/edges.gpq"
+    run:
+        logging.basicConfig(format="%(asctime)s %(process)d %(filename)s %(message)s", level=logging.INFO)
+
+        logging.info("Concatenate nodes and edges")
+        nodes = []
+        for node_path in input.component_nodes:
+            nodes.append(gpd.read_parquet(node_path))
+        edges = []
+        for edge_path in input.component_edges:
+            edges.append(gpd.read_parquet(edge_path))
+
+        network = snkit.network.Network(
+            nodes=pd.concat(nodes).reset_index(drop=True),
+            edges=pd.concat(edges).reset_index(drop=True),
+        )
+
+        logging.info("Labelling edge ends with from/to node ids")
+        network = snkit.network.add_topology(network)
+
+        logging.info("Labelling edges and nodes with network component ids")
+        network = snkit.network.add_component_ids(network)
+
+        logging.info("Writing network to disk")
+        network.nodes.to_parquet(output.composite_nodes)
+        network.edges.to_parquet(output.composite_edges)
+
+"""
+Test with:
+snakemake -c1 -- results/composite_network/south-east-asia-road/edges.gpq
+"""

workflow/transport/create_rail_network.py

@@ -19,14 +19,14 @@
 
 if __name__ == "__main__":
 
-    osm_edges_path = snakemake.input["edges"]  # type: ignore
-    osm_nodes_path = snakemake.input["nodes"]  # type: ignore
-    administrative_data_path = snakemake.input["admin"]  # type: ignore
-    nodes_output_path = snakemake.output["nodes"]  # type: ignore
-    edges_output_path = snakemake.output["edges"]  # type: ignore
-    slice_number = int(snakemake.params["slice_number"])  # type: ignore
-
-    slice_number = int(slice_number)
+    osm_edges_path = snakemake.input["edges"]
+    osm_nodes_path = snakemake.input["nodes"]
+    administrative_data_path = snakemake.input["admin"]
+    dataset_name = snakemake.wildcards.DATASET
+    nodes_output_path = snakemake.output["nodes"]
+    edges_output_path = snakemake.output["edges"]
+    slice_number = int(snakemake.params["slice_number"])
+
     osm_epsg = 4326
 
     logging.basicConfig(format="%(asctime)s %(process)d %(filename)s %(message)s", level=logging.INFO)
@@ -58,7 +58,7 @@
 
     # pass an id_prefix containing the slice number to ensure edges and nodes
     # are uniquely identified across all slices in the network
-    network = create_network(edges=edges, nodes=nodes, id_prefix=f"{slice_number}")
+    network = create_network(edges=edges, nodes=nodes, id_prefix=f"{dataset_name}_{slice_number}")
     logging.info(
         f"Network contains {len(network.edges)} edges and {len(network.nodes)} nodes"
     )
@@ -91,4 +91,4 @@
     network.edges.to_parquet(edges_output_path)
     network.nodes.to_parquet(nodes_output_path)
 
-    logging.info("Done creating network")
+    logging.info("Done creating network")