名前

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.

概要

setof text loader_generate_script(text[] param_states, text os);

Description

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 「shp2pgsql: ESRIシェープファイルローダを使う」 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.

  1. loader_variables keeps track of various variables such as census site, year, data and staging schemas

  2. loader_platform profiles of various platforms and where the various executables are located. Comes with windows and linux. More can be added.

  3. 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 .

Examples

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
:
:

See Also