[postgis-tickets] [SCM] PostGIS branch master updated. 3.2.0-477-g98f05d524
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commit 98f05d524ca0b2a59d208ad1e643479ad8c48b37
Author: Martin Davis <mtnclimb at gmail.com>
Date: Thu Feb 3 14:09:15 2022 -0800
Fix doc ST_LIneCrossingDirection
diff --git a/doc/reference_relationship.xml b/doc/reference_relationship.xml
index 8bc310f08..19de153c7 100644
--- a/doc/reference_relationship.xml
+++ b/doc/reference_relationship.xml
@@ -967,7 +967,7 @@ t
<refsection>
<title>Description</title>
- <para>Given 2 linestrings, returns an integer between -3 and 3
+ <para>Given two linestrings returns an integer between -3 and 3
indicating what kind of crossing behavior exists between them.
0 indicates no crossing.
This is only supported for <varname>LINESTRING</varname>s.
@@ -998,11 +998,8 @@ t
</itemizedlist>
</para>
<para>Availability: 1.4</para>
- <!-- optionally mention that this function uses indexes if appropriate -->
-
</refsection>
-
<refsection>
<title>Examples</title>
@@ -1014,20 +1011,20 @@ t
<imageobject>
<imagedata fileref="images/st_linecrossingdirection03.png" />
</imageobject>
- <caption><para>Blue: Line 1; Green: Line 2</para></caption>
+ <caption><para>Blue: Line A; Green: Line B</para></caption>
</mediaobject>
</informalfigure>
<programlisting>
-SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2,
- ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
+SELECT ST_LineCrossingDirection(lineA, lineB) As A_cross_B,
+ ST_LineCrossingDirection(lineB, lineA) As B_cross_A
FROM (SELECT
- ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
- ST_GeomFromText('LINESTRING (20 140, 71 74, 161 53)') As line2
+ ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As lineA,
+ ST_GeomFromText('LINESTRING (20 140, 71 74, 161 53)') As lineB
) As foo;
- l1_cross_l2 | l2_cross_l1
--------------+-------------
- -1 | 1
+ A_cross_B | B_cross_A
+-----------+-----------
+ -1 | 1
</programlisting>
<para><emphasis role="bold">Example:</emphasis>
@@ -1038,20 +1035,20 @@ FROM (SELECT
<imageobject>
<imagedata fileref="images/st_linecrossingdirection01.png" />
</imageobject>
- <caption><para>Blue: Line 1; Green: Line 2</para></caption>
+ <caption><para>Blue: Line A; Green: Line B</para></caption>
</mediaobject>
</informalfigure>
<programlisting>
-SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2,
- ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
+SELECT ST_LineCrossingDirection(lineA, lineB) As A_cross_B,
+ ST_LineCrossingDirection(lineB, lineA) As B_cross_A
FROM (SELECT
- ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
- ST_GeomFromText('LINESTRING(171 154,20 140,71 74,161 53)') As line2
+ ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As lineA,
+ ST_GeomFromText('LINESTRING(171 154,20 140,71 74,161 53)') As lineB
) As foo;
- l1_cross_l2 | l2_cross_l1
--------------+-------------
- 3 | -3
+ A_cross_B | B_cross_A
+-----------+-----------
+ 3 | -3
</programlisting>
<para><emphasis role="bold">Example:</emphasis>
@@ -1062,20 +1059,20 @@ FROM (SELECT
<imageobject>
<imagedata fileref="images/st_linecrossingdirection04.png" />
</imageobject>
- <caption><para>Blue: Line 1; Green: Line 2</para></caption>
+ <caption><para>Blue: Line A; Green: Line B</para></caption>
</mediaobject>
</informalfigure>
<programlisting>
-SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2,
- ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
+SELECT ST_LineCrossingDirection(lineA, lineB) As A_cross_B,
+ ST_LineCrossingDirection(lineB, lineA) As B_cross_A
FROM (SELECT
- ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
- ST_GeomFromText('LINESTRING(5 90, 71 74, 20 140, 171 154)') As line2
+ ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As lineA,
+ ST_GeomFromText('LINESTRING(5 90, 71 74, 20 140, 171 154)') As lineB
) As foo;
- l1_cross_l2 | l2_cross_l1
--------------+-------------
- -2 | 2
+ A_cross_B | B_cross_A
+-----------+-----------
+ -2 | 2
</programlisting>
<para><emphasis role="bold">Example:</emphasis>
@@ -1086,20 +1083,20 @@ FROM (SELECT
<imageobject>
<imagedata fileref="images/st_linecrossingdirection02.png" />
</imageobject>
- <caption><para>Blue: Line 1; Green: Line 2</para></caption>
+ <caption><para>Blue: Line A; Green: Line B</para></caption>
</mediaobject>
</informalfigure>
<programlisting>
-SELECT ST_LineCrossingDirection(foo.line1, foo.line2) As l1_cross_l2,
- ST_LineCrossingDirection(foo.line2, foo.line1) As l2_cross_l1
+SELECT ST_LineCrossingDirection(lineA, lineB) As A_cross_B,
+ ST_LineCrossingDirection(lineB, lineA) As B_cross_A
FROM (SELECT
- ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As line1,
- ST_GeomFromText('LINESTRING (171 154, 20 140, 71 74, 2.99 90.16)') As line2
+ ST_GeomFromText('LINESTRING(25 169,89 114,40 70,86 43)') As lineA,
+ ST_GeomFromText('LINESTRING (171 154, 20 140, 71 74, 2.99 90.16)') As lineB
) As foo;
- l1_cross_l2 | l2_cross_l1
--------------+-------------
- 2 | -2
+ A_cross_B | B_cross_A
+-----------+-----------
+ 2 | -2
</programlisting>
<programlisting>
-----------------------------------------------------------------------
Summary of changes:
doc/reference_relationship.xml | 69 ++++++++++++++++++++----------------------
1 file changed, 33 insertions(+), 36 deletions(-)
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