OpenStreetMap contributors (2025). OSM Huayhuash Rios y Arroyos [gis dataset]. OpenStreetMap. https://www.openstreetmap.org/. last updated: 0001-01-01 (update frequency: As Needed). A line feature set for the hydrography of the Cordillera Huayhuash sourced from OpenStreetMap with a query that includes Rivers and Streams. Key words: Perú, Huayhuash, Hidrografia Open Geospatial Consortium Standards: dynamic vector tiles | | WMS (coming soon) | WFS (coming soon) ETL documentation

ETL for hh_rios_arroyos_osm

######### # 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_rios_arroyos_osm/{download,etl} && cd /data/hh_rios_arroyos_osm # 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 curl -o download/hh_rios_arroyos_osm.osm 'https://overpass-api.de/api/interpreter?data=nwr%5B%22waterway%22~%22river|stream%22%5D%28-10.7,-77.33,-9.8,-76.55%29;%28._;>;%29;out;' # load into postGIS with: ogr2ogr -lco GEOMETRY_NAME=geom -f PostgreSQL PG:"" download/hh_rios_arroyos_osm.osm ######### # Step 2 - SQL script (pseudo code): #### # Select proper geometry into the named table psql -d $POSTGRES_DB -U $POSTGRES_USER -p $POSTGRES_PORT -h None -c " SELECT * INTO hh_rios_arroyos_osm FROM lines; DROP TABLE IF EXISTS lines; DROP TABLE IF EXISTS multilinestrings; DROP TABLE IF EXISTS multipolygons; DROP TABLE IF EXISTS other_relations; DROP TABLE IF EXISTS points;" # remove duplicate points and make geometries valid: UPDATE hh_rios_arroyos_osm SET geom=ST_MakeValid(ST_RemoveRepeatedPoints(geom)); # add local geometry column and reproject existing geometries into local EPSG: SELECT AddGeometryColumn ( 'hh_rios_arroyos_osm', 'geom_local', 5387, 'multilinestring', 2 ); UPDATE hh_rios_arroyos_osm SET geom_local=ST_MakeValid(ST_RemoveRepeatedPoints(ST_Transform(ST_Multi(geom),5387))); CREATE INDEX hh_rios_arroyos_osm_geom_local_idx ON hh_rios_arroyos_osm USING GIST (geom_local); NOTIFY pgrst, 'reload schema'; # Move into corrrect directory and create derivative directory in data package on osgeo cd /data/hh_rios_arroyos_osm/ mkdir -p derived # Create shapefile of table in derivate directory on osgeo ogr2ogr -f "ESRI Shapefile" -overwrite derived/hh_rios_arroyos_osm.shp PG:"" hh_rios_arroyos_osm # Create downloadable tarfile of shp in derivative directory on osgeo rm -f derived/hh_rios_arroyos_osm.shp.tar.gz tar -czf derived/hh_rios_arroyos_osm.shp.tar.gz meta_dcat_hh_rios_arroyos_osm.json -C derived hh_rios_arroyos_osm.shp hh_rios_arroyos_osm.prj hh_rios_arroyos_osm.shx hh_rios_arroyos_osm.dbf # Move into correct directory cd /data/hh_rios_arroyos_osm/