OEFA (). Red hídrica Perú [gis dataset]. PIFA OEFA. https://pifa.oefa.gob.pe/arcgis/rest/services/PORTAL/SERV_BASE_MFICAM/MapServer/14. last updated: 0001-01-01 (update frequency: As Needed). TBD Key words: Perú , Huayhuash , Hidrografía Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) ETL documentation

ETL for hh_redhidrica_oefa

######### # 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/hh_redhidrica_oefa/{download,etl} && cd /data/hh_redhidrica_oefa # 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 ogr2ogr -nln hh_redhidrica_oefa download/hh_redhidrica_oefa.json 'https://pifa.oefa.gob.pe/arcgis/rest/services/PORTAL/SERV_BASE_MFICAM/MapServer/14/query?where=1%3D1&geometry=%22xmin%22%3A-77.33%2C%22ymin%22%3A-10.7%2C%22xmax%22%3A-76.55%2C%22ymax%22%3A-9.8&geometryType=esriGeometryEnvelope&inSR=4326&spatialRel=esriSpatialRelIntersects&outFields=*&returnGeometry=true&outSR=4326&f=geojson' # 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/hh_redhidrica_oefa.json # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/hh_redhidrica_oefa.json -nlt multilinestring -nln hh_redhidrica_oefa ######### # Step 2 - SQL script (pseudo code): #### # remove duplicate points and make geometries valid: UPDATE hh_redhidrica_oefa SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom)); # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'hh_redhidrica_oefa', 'geom_local', 5387, 'multilinestring', 2 ); UPDATE hh_redhidrica_oefa SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(ST_Multi(geom),5387))); CREATE INDEX hh_redhidrica_oefa_geom_local_idx ON hh_redhidrica_oefa USING GIST (geom_local); NOTIFY pgrst, 'reload schema';