UM Geospatial Digital Special Collections

Citation: Miami-Dade County (2023). Miami-Dade County Park Boundaries [gis dataset]. Miami-Dade County. https://gis-mdc.opendata.arcgis.com/datasets/MDC::county-park-boundary/about. last updated: 2024-10-28 (update frequency: 6 months). Abstract: A polygon feature class of parks and recreational locations maintained by Miami-Dade County. Key words: Miami-Dade County Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_get_attributes(tablename=mdc_county_park_boundaries,lat=25.718,lng=-80.279,identifier=objectid,attrs=[objectid,folio,id,name,address,city,zipcode,phone,class,totacre,type,develop,natarea,pkschool,wifi,objectid,shape_area,shape_length],normal='') ETL documentation

ETL for mdc_county_park_boundaries

######### # 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_county_park_boundaries/{download,etl} && cd /data/mdc_county_park_boundaries # 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_county_park_boundaries.geojson 'https://opendata.arcgis.com/api/v3/datasets/a2cbc77f2f9e4e698aaa72f8c5d2db33_0/downloads/data?format=geojson&spatialRefId=4326&where=1%3D1' # 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_county_park_boundaries.geojson # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/mdc_county_park_boundaries.geojson -nlt multipolygon -nln mdc_county_park_boundaries ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE mdc_county_park_boundaries SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));" # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'mdc_county_park_boundaries', 'geom_local',2236,'multipolygon',2 ); UPDATE mdc_county_park_boundaries SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(ST_Multi(geom),2236))); CREATE INDEX mdc_county_park_boundaries_geom_local_idx ON mdc_county_park_boundaries USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"