UM Geospatial Digital Special Collections

Citation: Miami Dade County (2018). Miami-Dade County Zoning [gis dataset]. Miami Dade County. https://gis-mdc.opendata.arcgis.com/datasets/MDC::county-zoning-1/about. last updated: 2024-05-01 (update frequency: 1 week). Abstract: A polygon feature class of the county zoning boundaries and overlays derived from the zoning maps and other layers from the parcel model. This dataset should┬аnot be used for applications requiring accurate plat survey information such as zone and overlay dimension and area. Updated: Weekly-Sat Key words: Florida, Miami-Dade County, MDC, Geography, Property, Housing, Zoning, Infrastructure Open Geospatial Consortium Standards: vector tiles | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_get_attributes(tablename=mdc_county_zoning,lat=25.718,lng=-80.279,identifier=zone,attrs=[zone_id,zone,munc,ovly,ttrrss,zonemunc,zone_desc,short_desc,created_by,created_date,modified_by,modified_date],normal='') ETL documentation

ETL for mdc_county_zoning

######### # 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_zoning/{download,etl} && cd /data/mdc_county_zoning # 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_zoning.json 'https://opendata.arcgis.com/api/v3/datasets/69bda17d8d1f48e58268103aebf86546_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_zoning.json # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/mdc_county_zoning.json -nlt multipolygon -nln mdc_county_zoning ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE mdc_county_zoning SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));" # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'mdc_county_zoning', 'geom_local',2236,'multipolygon',2 ); UPDATE mdc_county_zoning SET geom_local=ST_Transform(ST_Multi(geom),2236); CREATE INDEX mdc_county_zoning_geom_local_idx ON mdc_county_zoning USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"