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# Bash script to create a new postgis database and prep it with GADM
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# data for geovalidation purposes.
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#
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# Basic workflow:
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# 1. Create postgis-enabled db
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# 2. Load gadm2 data into database
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# a. create polygon geometry upon import (loader does this)
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# b. create simplified polygon geometry after import
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# c. create polygon geography after import
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# d. create indexes
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# e. cluster data in geom index order
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#
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# For postgis installation see:
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# http://trac.osgeo.org/postgis/wiki/UsersWikiPostGIS20Ubuntu1204
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#
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# todo:
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# * better handle Antarctica problem so it can be included instead of
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# just dropped? probably not a huge deal for plants...
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#
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# Jim Regetz
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# NCEAS
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# Created November 2012
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PGROOT="/usr/share/postgresql/9.1/contrib/postgis-2.0"
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# create postgis template if one doesn't already exist
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sudo -u postgres createdb template_postgis
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sudo -u postgres psql -d template_postgis -f $PGROOT/postgis.sql
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sudo -u postgres psql -d template_postgis -f $PGROOT/spatial_ref_sys.sql
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sudo -u postgres psql -d template_postgis -f $PGROOT/postgis_comments.sql
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# create postgis db from template
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createdb geoscrub -T template_postgis
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#
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# assemble input data
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#
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# get GADM data (320MB zip file) and unzip
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wget http://www.gadm.org/data2/gadm_v2_shp.zip
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unzip gadm_v2_shp.zip
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#
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# create and populate gadm2 table
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#
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# load gadm2 data (took 4.7 minutes on willow, 26-Oct-2012)
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shp2pgsql -s 4326 -W latin1 gadm2 gadm2 geoscrub | psql -d geoscrub
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# create indexes
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psql -c 'CREATE INDEX "gadm2_iso_idx" ON gadm2 (iso)' geoscrub
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psql -c 'CREATE INDEX "gadm2_geom_gist" ON gadm2 USING GIST (geom)' geoscrub
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psql -c 'CREATE INDEX "gadm2_name_0_idx" ON gadm2 (name_0)' geoscrub
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psql -c 'CREATE INDEX "gadm2_name_1_idx" ON gadm2 (name_1)' geoscrub
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# physically reorder tuples on disk in country name index order
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# nb: i _think_ this helped, but am not 100% sure
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psql -c 'CLUSTER gadm2 USING gadm2_name_0_idx' geoscrub
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# create simplified country polygons
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psql -c \
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"SELECT AddGeometryColumn('public', 'gadm2', 'simple_geom', 4326, 'MULTIPOLYGON', 2 );
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UPDATE gadm2 SET simple_geom = SELECT st_simplify(geom, 0.001)" geoscrub
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psql -c
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'CREATE INDEX "gadm2_simple_geom_gist" ON gadm2 USING gist (simple_geom)' geoscrub
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# ... and create geography versions ...
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# note workaround to exclude Antarctica because it has an invalid
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# western extent of -180.000015258789
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psql -c \
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"ALTER TABLE gadm2 ADD COLUMN simple_geog geography;
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UPDATE gadm2 SET simple_geog = simple_geom::geography WHERE name_0<>'Antarctica'" geoscrub
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psql -c \
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'CREATE INDEX "gadm2_simple_geog_gist" ON gadm2 USING gist (simple_geog)' geoscrub
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