Loader_Generate_Script — Generates a shell script for the specified platform for the specified states that will download Tiger data, stage and load into tiger_data schema. Each state script is returned as a separate record. Latest version supports Tiger 2010 structural changes and also loads census tract, block groups, and blocks tables.
setof text loader_generate_script(text[] param_states, text os);
Generates a shell script for the specified platform for the specified states that will download Tiger data, stage and load into tiger_data schema. Each state script is returned as a separate record.
It uses unzip on Linux (7-zip on Windows by default) and wget to do the downloading. It uses Section 4.4.2, “shp2pgsql: Using the ESRI Shapefile Loader” to load in the data. Note the smallest unit it does is a whole state, but you can overwrite this by downloading the files yourself. It will only process the files in the staging and temp folders.
It uses the following control tables to control the process and different OS shell syntax variations.
loader_variables keeps track of various variables such as census site, year, data and staging schemas
loader_platform profiles of various platforms and where the various executables are located. Comes with windows and linux. More can be added.
loader_lookuptables each record defines a kind of table (state, county), whether to process records in it and how to load them in. Defines the steps to import data, stage data, add, removes columns, indexes, and constraints for each. Each table is prefixed with the state and inherits from a table in the tiger schema. e.g. creates tiger_data.ma_faces which inherits from tiger.faces
Availability: 2.0.0 to support Tiger 2010 structured data and load census tract (tract), block groups (bg), and blocks (tabblocks) tables .
Generate script to load up data for 2 states in Windows shell script format.
SELECT loader_generate_script(ARRAY['MA','RI'], 'windows') AS result; -- result -- set STATEDIR="\gisdata\www2.census.gov\geo\pvs\tiger2010st\44_Rhode_Island" set TMPDIR=\gisdata\temp\ set UNZIPTOOL="C:\Program Files\7-Zip\7z.exe" set WGETTOOL="C:\wget\wget.exe" set PGBIN=C:\Program Files\PostgreSQL\8.4\bin\ set PGPORT=5432 set PGHOST=localhost set PGUSER=postgres set PGPASSWORD=yourpasswordhere set PGDATABASE=geocoder set PSQL="%PGBIN%psql" set SHP2PGSQL="%PGBIN%shp2pgsql" %WGETTOOL% http://www2.census.gov/geo/pvs/tiger2010st/44_Rhode_Island/ --no-parent --relative --recursive --level=2 --accept=zip,txt --mirror --reject=html : :
Generate sh script
SELECT loader_generate_script(ARRAY['MA','RI'], 'sh') AS result; -- result -- STATEDIR="/gisdata/www2.census.gov/geo/pvs/tiger2010st/44_Rhode_Island" TMPDIR="/gisdata/temp/" UNZIPTOOL=unzip PGPORT=5432 PGHOST=localhost PGUSER=postgres PGPASSWORD=yourpasswordhere PGDATABASE=geocoder PSQL=psql SHP2PGSQ=shp2pgsql wget http://www2.census.gov/geo/pvs/tiger2010st/44_Rhode_Island/ --no-parent --relative --recursive --level=2 --accept=zip,txt --mirror --reject=html : :