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a couple typos in the DE-9IM explanation

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added further reading references.

git-svn-id: http://svn.osgeo.org/postgis/trunk@4985 b70326c6-7e19-0410-871a-916f4a2858ee
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Kevin Neufeld 2009-12-03 18:43:45 +00:00
parent 49e1fbeecd
commit 0203ef264c
1 changed files with 22 additions and 3 deletions
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25
doc/using_postgis_dataman.xml
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@ -994,7 +994,7 @@ gisdb=# SELECT
</informalfigure></para><para>For example, consider a linear
dataset representing a road network. It may be the task of a
GIS analyst to identify all road segments that cross
eachother, not at a point, but on a line, perhaps invalidating
each other, not at a point, but on a line, perhaps invalidating
some business rule. In this case, <xref linkend="ST_Crosses" /> does not
adequately provide the necessary spatial filter since, for
linear features, it returns <varname>true</varname> only where
@ -1008,7 +1008,7 @@ gisdb=# SELECT
<varname>[MULTI]POINT</varname>s,
<varname>[MULTI]LINESTRING</varname>s, etc.).</para> <para>A
more elegant / faster solution may indeed be
desireable.</para></entry>
desirable.</para></entry>
</row>
</tbody>
</tgroup>
@ -1422,7 +1422,7 @@ gisdb=# SELECT
</tgroup>
</informaltable>
<para>Read from left to right, the dimensional matrix is
<para>Read from left to right and from top to bottom, the dimensional matrix is
represented, '<emphasis role="bold">212101212</emphasis>'.</para>
<para>A relate matrix that would therefore represent our first
@ -1445,6 +1445,25 @@ SELECT a.lake_id, b.wharf_id
FROM lakes a, wharfs b
WHERE a.geom &amp;&amp; b.geom
AND ST_Relate(a.geom, b.geom, '102101FF2');</programlisting>
<para>For more information or reading, see:</para>
<itemizedlist spacing="compact">
<listitem>
<para><ulink url="http://www.opengeospatial.org/standards/sfs">OpenGIS Simple
Features Implementation Specification for SQL</ulink> (version 1.1, section 2.1.13.2)</para>
</listitem>
<listitem>
<para><ulink url="http://gis.hsr.ch/wiki/images/3/3d/9dem_springer.pdf">Dimensionally
Extended Nine-Intersection Model (DE-9IM) by Christian Strobl</ulink></para>
</listitem>
<listitem>
<para><ulink url="http://www.google.ca/url?sa=t&source=web&ct=res&cd=1&ved=0CAkQFDAA&url=http%3A%2F%2Fbooks.google.ca%2Fbooks%3Fid%3D6q2lOfLnwkAC%26dq%3D%2522Encyclopedia%2Bof%2BGIS%2522%2BBy%2BHui%2BXiong%26printsec%3Dfrontcover%26source%3Dbl%26ots%3D-0Xeu8l91l%26sig%3DEc5hKl01KkrfG8YkQbyWo9FC-8s%26hl%3Den%26ei%3DhwUYS_3qOJDWtQPSreyzBA%26sa%3DX%26oi%3Dbook_result%26ct%3Dresult%26resnum%3D1%26ved%3D0CAoQ6AEwAA&ei=hwUYS_3qOJDWtQPSreyzBA&usg=AFQjCNELBiBb7h4nr40k9UW7nxLiMWYmkQ&sig2=zTQ37S--6l61-wnYJwfpQw"><emphasis>Encyclopedia of GIS</emphasis> By Hui Xiong</ulink></para>
</listitem>
</itemizedlist>
</sect3>
</sect2>