UM Geospatial Digital Special Collections

Citation: Miami-Dade County (). Miami-Dade Cooling Stations [gis dataset]. Miami-Dade County. last updated: 2025-02-14 (update frequency: As Needed). Abstract: A point feature class with all of the cooling centers in Miami-Dade County. These sites consist of libraries and certain parks and recreation locations. These sites can be activated in case of a heat emergency. Key words: Florida, Miami-Dade County, MDC, Emergency, Cooling Station Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_nearest_neighbor(table=mdc_cooling_stations,lat=25.718,lng=-80.279,id=name) ETL documentation

ETL for mdc_cooling_stations

######### # GDSC ETL is performed in two steps: shell script to ETL data into postgres # and then additional transformations with SQL in postGIS (if needed). #### ######### # Step 1 - bash script (pseudo code) #### # create directory structure and move into it mkdir -p /data/mdc_cooling_stations/{download,etl} && cd /data/mdc_cooling_stations # set update flag based on last update and update frequency do_update=0 if date() < last_update + update_frequency else do_update = 1 # download if update flag is set: if do_update == 1 then wget -O download/mdc_cooling_stations.json 'https://services.arcgis.com/8Pc9XBTAsYuxx9Ny/arcgis/rest/services/Cooling_Centers/FeatureServer/0/query?where=1%3D1&outFields=*&returnGeometry=true&outSR=4326&f=geojson' # replace column names Shape__Length and Shape__Area to avoid conflict when # providing as service on ArcServer. sed -i 's/Shape__Length/shape_length/gI; s/Shape__Area/shape_area/gI' download/mdc_cooling_stations.json # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/mdc_cooling_stations.json -nlt point -nln mdc_cooling_stations ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid:UPDATE mdc_cooling_stations SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));# add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'mdc_cooling_stations', 'geom_local', 2236, 'point', 2 ); UPDATE mdc_cooling_stations SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(geom, 2236))); CREATE INDEX mdc_cooling_stations_geom_local_idx ON mdc_cooling_stations USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"