UM Geospatial Digital Special Collections

Citation: Miami-Dade County (2023). Municipal Boundary - Miami-Dade County [gis dataset]. Miami-Dade County. https://gis-mdc.opendata.arcgis.com/datasets/5ece0745e24b4617a49f2e098df8117f_0/explore. last updated: 2024-10-28 (update frequency: As Needed). Abstract: A polygon feature class of municipal boundaries within Miami-Dade County, data includes the municipal codes and names Key words: Miami-Dade County, Minicipalities, Municipal Boundaries Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_get_attributes(tablename=mdc_municipal_boundary,lat=25.718,lng=-80.279,identifier=name,attrs=[municuid,municid,name,fipscode],normal='') ETL documentation

ETL for mdc_municipal_boundary

######### # 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_municipal_boundary/{download,etl} && cd /data/mdc_municipal_boundary # 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_municipal_boundary.json 'https://opendata.arcgis.com/api/v3/datasets/5ece0745e24b4617a49f2e098df8117f_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_municipal_boundary.json # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/mdc_municipal_boundary.json -nlt multipolygon -nln mdc_municipal_boundary ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE mdc_municipal_boundary SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));" # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'mdc_municipal_boundary', 'geom_local',2236,'multipolygon',2 ); UPDATE mdc_municipal_boundary SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(ST_Multi(geom),2236))); CREATE INDEX mdc_municipal_boundary_geom_local_idx ON mdc_municipal_boundary USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"