From fe970f7b60697731d423facc37cb610ebcd71402 Mon Sep 17 00:00:00 2001
From: David Manthey <david.manthey@kitware.com>
Date: Mon, 27 Jun 2022 14:48:04 -0400
Subject: [PATCH] fix: Guard converting an empty polygon.

---
 examples/annotations/main.js        | 2 +-
 src/annotation/annotation.js        | 3 +++
 src/annotation/polygonAnnotation.js | 2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/examples/annotations/main.js b/examples/annotations/main.js
index b435d898b3..4b6098d280 100644
--- a/examples/annotations/main.js
+++ b/examples/annotations/main.js
@@ -212,7 +212,7 @@ function setBrushMode(mode) {
   const annot = geo.registries.annotations[shape].func({layer: layer});
   brushLayer.addAnnotation(annot);
   annot._coordinates([{x: 0, y: 0}, {x: size, y: 0}, {x: size, y: size}, {y: size, x: 0}]);
-  brushLayer.mode('cursor', annot);
+  brushLayer.mode(brushLayer.modes.cursor, annot);
   map.draw();
 }
 
diff --git a/src/annotation/annotation.js b/src/annotation/annotation.js
index 9b1d22537e..c40b2f74d6 100644
--- a/src/annotation/annotation.js
+++ b/src/annotation/annotation.js
@@ -754,6 +754,9 @@ var annotation = function (type, args) {
    */
   this.coordinates = function (gcs) {
     var coord = m_this._coordinates() || [];
+    if (!coord.length && (!coord.outer || !coord.outer.length)) {
+      coord = [];
+    }
     if (m_this.layer()) {
       var map = m_this.layer().map();
       gcs = (gcs === null ? map.gcs() : (
diff --git a/src/annotation/polygonAnnotation.js b/src/annotation/polygonAnnotation.js
index bc3b1c1be3..eca5c7e6c6 100644
--- a/src/annotation/polygonAnnotation.js
+++ b/src/annotation/polygonAnnotation.js
@@ -134,7 +134,7 @@ var polygonAnnotation = function (args) {
       (coord.inner || []).forEach((h) => result[0].push(h.map((pt) => [pt.x, pt.y])));
       return result;
     }
-    if (coord.length < 3) {
+    if (coord.length < 3 || !coord.map) {
       return [];
     }
     return [[coord.map((pt) => [pt.x, pt.y])]];