UM Geospatial Digital Special Collections

Citation: U.S. Energy Information Administration (EIA) (2020). US Natural Gas Energy [gis dataset]. Esri. https://atlas.eia.gov/datasets/eia::natural-gas-1/about. last updated: 2024-10-28 (update frequency: As Needed). Abstract: Operable electric generating plants in the US by energy source (natural gas) Key words: United States, Environment, Energy, Natural Gas Energy, Powerplant, Infrastructure Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) Analytical Functions: gdsc_nearest_neighbor(table=us_natural_gas_energy,lat=25.718,lng=-80.279,id=utility_name) ETL documentation

ETL for us_natural_gas_energy

######### # 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/us_natural_gas_energy/{download,etl} && cd /data/us_natural_gas_energy # 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/us_natural_gas_energy.json 'https://services7.arcgis.com/FGr1D95XCGALKXqM/arcgis/rest/services/ElectricPowerPlants/FeatureServer/5/query?where=1%3D1&outFields=*&outSR=4326&f=json' # 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/us_natural_gas_energy.json # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/us_natural_gas_energy.json -nlt point -nln us_natural_gas_energy ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE us_natural_gas_energy SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom));" # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'us_natural_gas_energy', 'geom_local',2236,'point',2 ); UPDATE us_natural_gas_energy SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(geom,2236))); CREATE INDEX us_natural_gas_energy_geom_local_idx ON us_natural_gas_energy USING GIST (geom_local); NOTIFY pgrst, 'reload schema';"