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start documenting tiger geocoder
git-svn-id: http://svn.osgeo.org/postgis/trunk@6741 b70326c6-7e19-0410-871a-916f4a2858ee
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Regina Obe
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@ -73,7 +73,7 @@ raster_comments.sql: ./xsl/raster_comments.sql.xsl postgis.xml postgis_aggs_mm.x
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topology_comments.sql: ./xsl/topology_comments.sql.xsl postgis.xml postgis_aggs_mm.xml
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$(XSLTPROC) ./xsl/topology_comments.sql.xsl postgis.xml > $@
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postgis-out.xml: postgis.xml introduction.xml installation.xml faq.xml using_postgis_dataman.xml using_postgis_app.xml performance_tips.xml reference.xml reference_management.xml reference_constructor.xml reference_accessor.xml reference_editor.xml reference_output.xml reference_operator.xml reference_measure.xml reference_processing.xml reference_lrs.xml reference_transaction.xml reference_misc.xml reference_exception.xml extras.xml extras_topology.xml postgis_aggs_mm.xml reference_raster.xml faq_raster.xml reporting.xml release_notes.xml ../Version.config
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postgis-out.xml: postgis.xml introduction.xml installation.xml faq.xml using_postgis_dataman.xml using_postgis_app.xml performance_tips.xml reference.xml reference_management.xml reference_constructor.xml reference_accessor.xml reference_editor.xml reference_output.xml reference_operator.xml reference_measure.xml reference_processing.xml reference_lrs.xml reference_transaction.xml reference_misc.xml reference_exception.xml extras.xml extras_topology.xml extras_tigergeocoder.xml postgis_aggs_mm.xml reference_raster.xml faq_raster.xml reporting.xml release_notes.xml ../Version.config
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cat $< | sed "s/@@LAST_RELEASE_VERSION@@/${POSTGIS_MAJOR_VERSION}.${POSTGIS_MINOR_VERSION}.${POSTGIS_MICRO_VERSION}/g" > $@
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chunked-html: postgis-out.xml images
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@ -1,2 +1,10 @@
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<?xml version="1.0" encoding="UTF-8"?>
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&extras_topology;
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<chapter id="Extras">
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<title>PostGIS Extras</title>
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<para>This chapter documents features found in the extras folder of the PostGIS source tarballs and source repository. These
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are not always packaged with PostGIS binary releases, but are usually plpgsql based or standard shell scripts that can be run as is.</para>
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&extras_tigergeocoder;
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</chapter>
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103
doc/extras_tigergeocoder.xml
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103
doc/extras_tigergeocoder.xml
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@ -0,0 +1,103 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<sect1 id="Tiger_Geocoder">
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<title>Tiger Geocoder</title>
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<sect1info>
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<abstract>
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<para>A plpgsql based geocoder written for <ulink url="http://www.census.gov/geo/www/tiger/index.html">TIGER census data</ulink>.</para>
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<para>Design:</para>
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<para>There are two components to the geocoder, the address normalizer and the address geocoder. </para>
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<para>The goal of this project is to build a fully functional geocoder that can process an arbitrary
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address string and, using normalized TIGER census data, produce a point geometry and rating reflecting the location of the given address.</para>
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<para>The geocoder should be simple for anyone familiar with PostGIS to install and use.</para>
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<para>It should be robust enough to function properly despite formatting and spelling errors.</para>
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<para>It should be extensible enough to be used with future data updates, or alternate data sources with a minimum of coding changes.</para>
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</abstract>
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</sect1info>
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<refentry id="Geocode">
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<refnamediv>
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<refname>Geocode</refname>
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<refpurpose>Takes in an address as a string and outputs a set of possible locations which include a point geometry in NAD 83 long lat, a normalized address for each, and the rating. The lower the rating the more likely the match.
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Results are sorted by lowest rating first.</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcprototype>
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<funcdef>setof record<function>geocode</function></funcdef>
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<paramdef><type>address </type> <parameter>varchar</parameter></paramdef>
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<paramdef><type>OUT addy</type> <parameter>norm_addy</parameter></paramdef>
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<paramdef><type>OUT geomout</type> <parameter>geometry</parameter></paramdef>
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<paramdef><type>OUT rating</type> <parameter>integer</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>setof record<function>geocode</function></funcdef>
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<paramdef><type>in_addy </type> <parameter>norm_addy</parameter></paramdef>
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<paramdef><type>OUT addy</type> <parameter>norm_addy</parameter></paramdef>
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<paramdef><type>OUT geomout</type> <parameter>geometry</parameter></paramdef>
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<paramdef><type>OUT rating</type> <parameter>integer</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsection>
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<title>Description</title>
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<para>Takes in an address as a string and outputs a set of possible locations which include a point geometry in NAD 83 long lat, a <varname>normalized_address</varname> (addy) for each, and the rating. The lower the rating the more likely the match.
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Results are sorted by lowest rating first. The higher the rating the less likely the geocode is right.</para>
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<para>Enhanced: 2.0.0 to support Tiger 2010 structured data and revised some logic to improve speed.</para>
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</refsection>
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<refsection>
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<title>Examples</title>
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<para>Exact matches are fairly fast (205ms)</para>
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<programlisting>SELECT g.rating, ST_X(g.geomout) As lon, ST_Y(g.geomout) As lat, (addy).address As stno, (addy).streetname As street,
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(addy).streettypeabbrev As styp, (addy).location As city, (addy).stateabbrev As st,(addy).zip
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FROM geocode('75 State Street, Boston MA 02109') As g;
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rating | lon | lat | stno | street | styp | city |st | zip
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--------+-------------------+------------------+------+--------+------+--------+----+-------
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0 | -71.0556974285714 | 42.3590795714286 | 75 | State | St | Boston | MA | 02109
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</programlisting>
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<para>Even if zip is not passed in the geocoder can guess (took about 450 ms)</para>
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<programlisting>SELECT g.rating, ST_AsText(ST_SnapToGrid(g.geomout,0.00001)) As wktlonlat, (addy).address As stno, (addy).streetname As street,
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(addy).streettypeabbrev As styp, (addy).location As city, (addy).stateabbrev As st,(addy).zip
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FROM geocode('226 Hanover Street, Boston, MA') As g;
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rating | wktlonlat | stno | street | styp | city | st | zip
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--------+---------------------------+------+---------+------+--------+----+-------
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0 | POINT(-71.05518 42.36311) | 226 | Hanover | St | Boston | MA | 02113
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</programlisting>
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<para>Can handle misspellings and provides more than one possible solution with rankings and takes longer (4 seconds).</para>
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<programlisting>SELECT g.rating, ST_AsText(ST_SnapToGrid(g.geomout,0.00001)) As wktlonlat, (addy).address As stno, (addy).streetname As street,
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(addy).streettypeabbrev As styp, (addy).location As city, (addy).stateabbrev As st,(addy).zip
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FROM geocode('31 - 37 Stewart Street, Boston, MA 02116') As g;
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rating | wktlonlat | stno | street | styp | city | st| zip
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--------+---------------------------+------+---------+------+---------------+----+-------
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55 | POINT(-71.36934 42.68158) | 31 | Stewart | St | Lowell | MA | 01826
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55 | POINT(-71.34825 42.63324) | 31 | Stewart | St | Lowell | MA | 01851
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55 | POINT(-71.59109 42.22556) | 31 | Stewart | St | Hopkinton | MA | 01748
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56 | POINT(-71.26747 42.54075) | 31 | Stewart | St | Burlington | MA | 01821
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56 | POINT(-71.20324 42.53543) | 31 | Stewart | St | Burlington | MA | 01803
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57 | POINT(-72.57319 42.22111) | 31 | Stewart | St | Chicopee | MA | 01075
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57 | POINT(-72.59728 42.16919) | 31 | Stewart | St | Chicopee | MA | 01020
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59 | POINT(-71.08627 42.78109) | 31 | Stewart | St | Haverhill | MA | 01830
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60 | POINT(-71.36752 42.09772) | 31 | Stewart | St | Franklin Town | MA | 02038
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60 | POINT(-71.14573 41.72036) | 31 | Stewart | St | Fall River | MA | 02720
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70 | POINT(-71.0646 42.35105) | 31 | Stuart | St | Boston | MA | 02116
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(11 rows) </programlisting>
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</refsection>
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<!-- Optionally add a "See Also" section -->
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<refsection>
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<title>See Also</title>
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<para><xref linkend="ST_AsText"/>,<xref linkend="ST_SnapToGrid"/>, <xref linkend="ST_X"/>, <xref linkend="ST_Y"/></para>
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</refsection>
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</refentry>
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</sect1>
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@ -45,6 +45,7 @@
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<!ENTITY faq_raster SYSTEM "faq_raster.xml">
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<!ENTITY extras SYSTEM "extras.xml">
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<!ENTITY extras_topology SYSTEM "extras_topology.xml">
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<!ENTITY extras_tigergeocoder SYSTEM "extras_tigergeocoder.xml">
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<!ENTITY sfs_compliant
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"<inlinemediaobject>
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