figure for minimum bounding circle

git-svn-id: http://svn.osgeo.org/postgis/trunk@4448 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/html/image_src/Makefile.in b/doc/html/image_src/Makefile.in
index 1340ffd212e39d0444cc5c8a775f30c86717baad..a2c2c209e00130cc4534353a5dca27a073ad5e5f 100644 (file)
--- a/doc/html/image_src/Makefile.in
+++ b/doc/html/image_src/Makefile.in
@@ -58,6 +58,7 @@ IMAGES= \
        ../images/st_isvalid06.png \
        ../images/st_isvalid07.png \
        ../images/st_isvalid08.png \
+       ../images/st_minimumboundingcircle01.png \
        ../images/st_symdifference01.png \
        ../images/st_symdifference02.png \
        ../images/st_touches01.png \

diff --git a/doc/reference.xml b/doc/reference.xml
index ec221edb3352850e08aa3f5fb7121fdd9f95f9d7..2ac32ffd09cd1f6f95070b0772cb1469fb6bd68e 100644 (file)
--- a/doc/reference.xml
+++ b/doc/reference.xml
@@ -12152,7 +12152,7 @@ POLYGON((50 5,10 8,10 10,100 190,150 30,150 10,50 5))
          </refsection>
          <refsection>
                <title>See Also</title>
-               <para><xref linkend="ST_Collect" /></para>
+               <para><xref linkend="ST_Collect" />, <xref linkend="ST_MinimumBoundingCircle" /></para>
          </refsection>
        </refentry>
 
@@ -12824,26 +12824,32 @@ SELECT ST_AsEWKT(ST_LineToCurve(ST_GeomFromEWKT('LINESTRING(1 2 3, 3 4 8, 5 6 4,
        ST_MinimumBoundingCircle(ST_Collect(d.the_geom)) As the_geom
        FROM disease_obs As d
        GROUP BY d.disease_type;
-
-       --Only use 8 segs to approximate a quarter circle
+</programlisting>
+       <informalfigure>
+         <mediaobject>
+               <imageobject>
+                 <imagedata fileref="images/st_minimumboundingcircle01.png" />
+               </imageobject>
+               <caption><para>Minimum bounding circle of a point and linestring.  Using 8 segs to approximate a quarter circle</para></caption>
+         </mediaobject>
+       </informalfigure>
+<programlisting>
        SELECT ST_AsText(ST_MinimumBoundingCircle(
                ST_Collect(
-                       ST_GeomFromEWKT('LINESTRING(1 2,3 4)'),
-                               ST_MakePoint(0, 2)), 8
+                       ST_GeomFromEWKT('LINESTRING(50 100,150 175)'),
+                               ST_Point(0, 100)), 8
                                )) As wktmbc;
 wktmbc
 -----------
-POLYGON((3.30277563773199 3,3.26813580935709 2.64829592031203,3.16554751341057 2.31010763116856,
-2.9989531605735 1.99843151886317,2.7747548783982 1.7252451216018,2.50156848113683 1.50104683942651,
-2.18989236883145 1.33445248658943,1.85170407968797 1.23186419064291,1.5 1.19722436226801,
-1.14829592031204 1.23186419064291,0.81010763116856 1.33445248658943,0.498431518863177 1.5010468394265,
-0.225245121601807 1.7252451216018,0.00104683942650734 1.99843151886317,-0.16554751341057 2.31010763116855,
--0.268135809357086 2.64829592031203,-0.302775637731995 2.99999999999999,-0.268135809357088 3.35170407968796,
--0.165547513410575 3.68989236883144,0.00104683942650074 4.00156848113682,0.225245121601799 4.27475487839819,
-0.498431518863167 4.49895316057349,0.81010763116855 4.66554751341057,1.14829592031203 4.76813580935709,
-1.49999999999999 4.80277563773199,1.85170407968796 4.76813580935709,2.18989236883144 4.66554751341057,
-2.50156848113682 4.4989531605735,2.77475487839819 4.2747548783982,2.99895316057349 4.00156848113683,
-3.16554751341057 3.68989236883145,3.26813580935709 3.35170407968797,3.30277563773199 3))
+POLYGON((158.852549156242 137.5,157.241345936731 121.141179183236,152.469653914349 105.411018676327,144.720846537521 90.914019725979,
+134.292706128157 78.2072938718429,121.585980274021 67.7791534624793,107.088981323673 60.0303460856514,
+91.3588208167646 55.2586540632694,75.0000000000001 53.6474508437579,58.6411791832357 55.2586540632694,42.911018676327 60.0303460856513,
+28.4140197259791 67.7791534624792,15.707293871843 78.2072938718428,5.27915346247937 90.9140197259787,-2.46965391434857 105.411018676327,
+-7.24134593673054 121.141179183235,-8.85254915624212 137.5,-7.24134593673065 153.858820816764,-2.46965391434878 169.588981323673,
+5.27915346247906 184.085980274021,15.7072938718426 196.792706128157,28.4140197259786 207.220846537521,42.9110186763265 214.969653914349,
+58.6411791832352 219.741345936731,74.9999999999997 221.352549156242,91.3588208167642 219.741345936731,107.088981323673 214.969653914349,
+121.585980274021 207.220846537521,134.292706128157 196.792706128157,144.720846537521 184.085980274021,152.469653914349 169.588981323673,
+157.241345936731 153.858820816765,158.852549156242 137.5))
                                </programlisting>
          </refsection>
          <refsection>
@@ -13220,7 +13226,7 @@ MULTILINESTRING((1 3 2.75,1 4 2),(1 1 3,1 2 2.25))
 
                <para><xref linkend="ST_Difference" />, <xref linkend="ST_Intersection" />, <xref linkend="ST_Union" /></para>
          </refsection>
-       </refentry>
+</refentry>
 
 
 <refentry id="ST_Union">