UM Geospatial Digital Special Collections

Citation: Miami-Dade County (2024). Little River Boundary [gis dataset]. University of Miami GDSC. last updated: 2024-10-03 (update frequency: Never). Abstract: Boundary layer for the Adaptation Action Area in Little River. Key words: Florida, Miami-Dade County, Little River Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_get_attributes(tablename=lr_aaa_boundary,lat=25.718,lng=-80.279,identifier=id,attrs=[],normal='') ETL documentation

ETL for lr_aaa_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/lr_aaa_boundary/{download,etl} && cd /data/lr_aaa_boundary # set update flag based on last update and update frequency do_update=0 if date() < last_update + update_frequency else do_update = 1 # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/LittleRiver_AAA_Boundary.shp -nlt multipolygon -nln lr_aaa_boundary ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE lr_aaa_boundary SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));" # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'lr_aaa_boundary', 'geom_local',2236,'multipolygon',2 ); UPDATE lr_aaa_boundary SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(ST_Multi(geom),2236))); CREATE INDEX lr_aaa_boundary_geom_local_idx ON lr_aaa_boundary USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"