Update documentation

h2/src/docsrc/help/help.csv

@@ -3038,9 +3038,14 @@ ENUM('clubs', 'diamonds', 'hearts', 'spades')
 "Data Types","GEOMETRY Type","
 GEOMETRY
 ","
-A spatial geometry type, based on the ""org.locationtech.jts"" library.
+A spatial geometry type.
+Mapped to ""org.locationtech.jts.geom.Geometry"" if JTS library is in classpath.
 May be represented in textual format using the WKT (well-known text) or EWKT (extended well-known text) format.
 Values are stored internally in EWKB (extended well-known binary) format.
+Only a subset of EWKB and EWKT features is supported.
+Supported objects are POINT, LINESTRING, POLYGON, MULTIPOINT, MULTILINESTRING, MULTIPOLYGON, and GEOMETRYCOLLECTION.
+Supported dimension systems are XY (2D), XYZ, XYM, and XYZM.
+SRID (spatial reference system identifier) is supported.
 
 Use a quoted string containing a WKT/EWKT formatted string or ""PreparedStatement.setObject()"" to store values,
 and ""ResultSet.getObject(..)"" or ""ResultSet.getString(..)"" to retrieve the values.

h2/src/docsrc/html/advanced.html

@@ -1415,19 +1415,7 @@ that means the probability is about 0.000'000'000'06.
 
 <h2 id="spatial_features">Spatial Features</h2>
 <p>
-H2 supports the geometry data type and spatial indexes if
-the <a href="https://projects.eclipse.org/projects/locationtech.jts">JTS Topology Suite</a>
-is in the classpath.
-To run the H2 Console tool with the JTS tool, you need to download the
-<a href="https://search.maven.org/remotecontent?filepath=org/locationtech/jts/jts-core/1.15.0/jts-core-1.15.0.jar">JTS-CORE 1.15.0 jar file</a>
-and place it in the h2 bin directory. Then edit the <code>h2.sh</code> file as follows:
-</p>
-<pre>
-#!/bin/sh
-dir=$(dirname "$0")
-java -cp "$dir/h2.jar:jts-core-1.15.0.jar:$H2DRIVERS:$CLASSPATH" org.h2.tools.Console "$@"
-</pre>
-<p>
+H2 supports the geometry data type and spatial indexes.
 Here is an example SQL script to create a table with a spatial column and index:
 </p>
 <pre>