From 772dd73d907b615d34816a92811531cdf9a3fd0f Mon Sep 17 00:00:00 2001
From: Patrick Dowler <pdowler.cadc@gmail.com>
Date: Mon, 25 Mar 2024 11:49:50 -0700
Subject: [PATCH] change multipolygon to use pair of NaNs as delimiter;
 resolves #36

---
 DALI.tex | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/DALI.tex b/DALI.tex
index 6b49286..c21aa6e 100644
--- a/DALI.tex
+++ b/DALI.tex
@@ -870,10 +870,11 @@ \subsection{Multi-Polygon}
 following metadata in the \xmlel{FIELD} element:  \verb|datatype="double"| or \verb|datatype="float"|,
 \verb|arraysize="*"|, \verb|xtype="multipolygon"|
 (where arraysize may also be fixed length or variable length with limit).
-The array holds a sequence of non-overlapping polygon(s) separated by a \verb|NaN| value. For example:
+The array holds a sequence of non-overlapping polygon(s) separated by a pair of \verb|NaN| values
+(a NaN point). For example:
 
 \begin{verbatim}
-10.0 10.0 10.2 10.0 10.2 10.2 10.0 10.2 NaN
+10.0 10.0 10.2 10.0 10.2 10.2 10.0 10.2 NaN NaN
 11.0 11.0 11.2 11.0 11.2 11.2 11.0 11.2
 \end{verbatim}