<?xml version="1.0" encoding="UTF-8"?>
-<chapter>
- <title>Frequently Asked Questions</title>
+<chapter id="PostGIS_FAQ">
+ <title>PostGIS Frequently Asked Questions</title>
<qandaset>
<qandaentry>
</answer>
</qandaentry>
+ <qandaentry>
+ <question>
+ <para>I tried to use PgAdmin to view my geometry column and it is blank, what gives?</para>
+ </question>
+
+ <answer>
+ <para>PgAdmin doesn't show anything for large geometries. The best ways to verify you do have day in your geometry columns are?</para>
+
+
+ <programlisting>-- this should return no records if all your geom fields are filled in
+SELECT somefield FROM mytable WHERE geom IS NULL;</programlisting>
+
+ <programlisting>-- To tell just how large your geometry is do a query of the form
+--which will tell you the most number of points you have in any of your geometry columns
+SELECT MAX(ST_NPoints(geom)) FROM sometable;</programlisting>
+ </answer>
+ </qandaentry>
+
<qandaentry>
<question>
<para>What kind of geometric objects can I store?</para>