Put in image of ST_ConvexHull

git-svn-id: http://svn.osgeo.org/postgis/trunk@4436 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/doc/html/image_src/Makefile.in b/doc/html/image_src/Makefile.in
index 68a6a480e547c0fefa521286ac2cf554edcdebb4..00723958335b8a62f0294428f3658a744616ad97 100644 (file)
--- a/doc/html/image_src/Makefile.in
+++ b/doc/html/image_src/Makefile.in
@@ -37,6 +37,7 @@ IMAGES= \
        ../images/st_contains04.png \
        ../images/st_contains05.png \
        ../images/st_contains06.png \
+       ../images/st_convexhull01.png \
        ../images/st_crosses01.png \
        ../images/st_crosses02.png \
        ../images/st_crosses03.png \

diff --git a/doc/html/image_src/st_convexhull01.wkt b/doc/html/image_src/st_convexhull01.wkt
new file mode 100644 (file)
index 0000000..930d41a
--- /dev/null
+++ b/doc/html/image_src/st_convexhull01.wkt
@@ -0,0 +1,3 @@
+Style1;POLYGON((3 4,100 190,10 8,3 4))
+Style2;LINESTRING(100 190,10 8)
+Style2;POINT(3 4)

diff --git a/doc/reference.xml b/doc/reference.xml
index 96feac42ecfe2c3c11c87f8716493f21f33bd309..ec757eb5cec5d7c89089d29f42535bd3ab372dcd 100644 (file)
--- a/doc/reference.xml
+++ b/doc/reference.xml
@@ -12122,19 +12122,40 @@ MULTILINESTRING((1 2,3 4),(3 4,4 5))
 
          <refsection>
                <title>Examples</title>
-<programlisting>SELECT d.disease_type,
+<programlisting>
+--Get estimate of infected area based on point observations
+SELECT d.disease_type,
        ST_ConvexHull(ST_Collect(d.the_geom)) As the_geom
        FROM disease_obs As d
        GROUP BY d.disease_type;
+</programlisting>
 
-       SELECT ST_AsEWKT(ST_ConvexHull(
+<informaltable>
+       <tgroup cols="1">
+         <tbody>
+               <row>
+                 <entry><para><informalfigure>
+                         <mediaobject>
+                               <imageobject>
+                                 <imagedata fileref="images/st_convexhull01.png" />
+                               </imageobject>
+                               <caption><para>Convex Hull of a Linestring and a Point</para></caption>
+                         </mediaobject>
+                       </informalfigure>
+                               <programlisting>
+SELECT ST_AsText(ST_ConvexHull(
                ST_Collect(
-                       ST_GeomFromEWKT('LINESTRING(1 2 3,3 4 5)'),
-                               ST_MakePoint(0, 2, 0))
+                       ST_GeomFromText('LINESTRING(100 190,10 8)'),
+                               ST_MakePoint(3, 4))
                                ));
-       ---st_asewkt--
-       POLYGON((0 2 0,3 4 5,1 2 3,0 2 0))
+       ---st_astext--
+POLYGON((3 4,100 190,10 8,3 4))
                                </programlisting>
+       </para></entry>
+               </row>
+       </tbody>
+</tgroup>
+</informaltable>
          </refsection>
          <refsection>
                <title>See Also</title>