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add new st_linecrossing graphic, experiment with new style, put in informal table
git-svn-id: http://svn.osgeo.org/postgis/trunk@4484 b70326c6-7e19-0410-871a-916f4a2858ee
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@ -59,6 +59,7 @@ IMAGES= \
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../images/st_isvalid07.png \
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../images/st_isvalid08.png \
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../images/st_linecrossingdirection01.png \
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../images/st_linecrossingdirection02.png \
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../images/st_line_interpolate_point01.png \
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../images/st_line_substring01.png \
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../images/st_minimumboundingcircle01.png \
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@ -1,3 +1,2 @@
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Style2;LINESTRING(25 169,89 114,40 70,86 43)
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Style2;GEOMETRYCOLLECTION(POINT(25 169),POLYGON((80.84 41.66,84.66 48.16,86 43,80.84 41.66)) )
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Style2;GEOMETRYCOLLECTION(LINESTRING(25 169,89 114,40 70,86 43), POINT(25 169),POLYGON((78.26 40.98,83.98 50.74,86 43,78.26 40.98)) )
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Style1-thinline;GEOMETRYCOLLECTION(LINESTRING(171 154,20 140,71 74,161 53),POINT(171 154),POLYGON((153.15 48.12,156.12 60.85,161 53,153.15 48.12)) )
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@ -1,3 +1,2 @@
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Style2;LINESTRING(25 169,89 114,40 70,86 43)
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Style2;GEOMETRYCOLLECTION(POINT(25 169),POLYGON((80.84 41.66,84.66 48.16,86 43,80.84 41.66)) )
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Style1-thinline;GEOMETRYCOLLECTION(LINESTRING(171 154, 20 140, 71 74, 2.99 90.16),POINT(171 154),POLYGON((153.15 48.12,156.12 60.85,161 53,153.15 48.12)) )
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Style2-thinline;GEOMETRYCOLLECTION(LINESTRING(25 169,89 114,40 70,86 43), POINT(25 169), POLYGON((80.84 41.66,84.66 48.16,86 43,80.84 41.66)) )
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Style1-thinline;GEOMETRYCOLLECTION(LINESTRING(171 154, 20 140, 71 74, 2.99 90.16),POINT(171 154),POLYGON((6.66 84.21,2.99 90.16,8.94 93.83,6.66 84.21)) )
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@ -1,7 +1,7 @@
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# This file describes the styles used to render the png images
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# The styleName attribute for every style should be unique.
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#
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# To use a style, prefix the wkt string with the styleName; i.e.
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# To use a style, prefix the wkt string with the styleName; i.e.
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# Style1;POINT(50 50)
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#
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# convert -list color
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@ -51,3 +51,13 @@ polygonFillColor = DarkSeaGreen4
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polygonStrokeColor = DarkGreen
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polygonStrokeWidth = 0
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[Style]
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# The second layer in the rendered WKT image
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styleName = Style2-thinline
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pointSize = 6
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pointColor = DarkSeaGreen4
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lineWidth = 3
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lineColor = DarkSeaGreen4
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polygonFillColor = DarkSeaGreen4
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polygonStrokeColor = DarkGreen
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polygonStrokeWidth = 0
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@ -9677,38 +9677,63 @@ WHERE ST_Crosses(roads.the_geom, highways.the_geom);</programlisting>
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<refsection>
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<title>Examples</title>
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<!-- TODO: We really badly need diagrams here and more examples -->
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<informalfigure>
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<mediaobject>
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<imageobject>
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<imagedata fileref="images/st_linecrossingdirection01.png" />
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</imageobject>
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<caption><para>Line 1 fat line, Line 2 thin line, ball is start point,
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<informaltable>
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<tgroup cols="2">
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<tbody>
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<row>
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<entry><para><informalfigure>
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<mediaobject>
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<imageobject>
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<imagedata fileref="images/st_linecrossingdirection01.png" />
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</imageobject>
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<caption><para>Line 1 (green), Line 2 ball is start point,
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triangle are end points. Query below. </para></caption>
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</mediaobject>
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</informalfigure>
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<programlisting>SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2 ,
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</mediaobject>
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</informalfigure>
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<programlisting>
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SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2 ,
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ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
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FROM (SELECT
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FROM (SELECT
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ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
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ST_GeomFromText('LINESTRING(171 154,20 140,71 74,161 53)') As line2
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ST_GeomFromText('LINESTRING(171 154,20 140,71 74,161 53)') As line2
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) As foo;
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l1_cross_l2 | l2_cross_l1
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-------------+-------------
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3 | -3
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</programlisting>
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<programlisting>
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SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2 ,
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</programlisting>
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</para>
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</entry>
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<entry>
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<para><informalfigure>
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<mediaobject>
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<imageobject>
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<imagedata fileref="images/st_linecrossingdirection02.png" />
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</imageobject>
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<caption><para>Line 1 (green), Line 2 ball is start point,
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triangle are end points. Query below.</para></caption>
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</mediaobject>
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</informalfigure>
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<programlisting>
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SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2 ,
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ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
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FROM (SELECT
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FROM (SELECT
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ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
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ST_GeomFromText('LINESTRING (171 154, 20 140, 71 74, 2.99 90.16)') As line2
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) As foo;
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l1_cross_l2 | l2_cross_l1
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l1_cross_l2 | l2_cross_l1
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-------------+-------------
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2 | -3
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</programlisting>
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2 | -3
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</programlisting>
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</para>
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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<programlisting>
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SELECT s1.gid, s2.gid, ST_LineCrossingDirection(s1.the_geom, s2.the_geom)
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FROM streets s1 CROSS JOIN streets s2 ON (s1.gid != s2.gid AND s1.the_geom && s2.the_geom )
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