From e4b89b013ba5a6aaee77ecce7f9bfa99ff75846f Mon Sep 17 00:00:00 2001
From: Martin Davis <mtnclimb@gmail.com>
Date: Sun, 21 Feb 2021 16:38:09 -0800
Subject: [PATCH 1/2] Add a check for MaximumInscribedCircle invalid tolerance

Signed-off-by: Martin Davis <mtnclimb@gmail.com>
---
 .../jts/algorithm/construct/MaximumInscribedCircle.java        | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java b/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
index 8d6b1bde60..3402c47a82 100644
--- a/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
+++ b/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
@@ -104,6 +104,9 @@ public static LineString getRadiusLine(Geometry polygonal, double tolerance) {
    * @param tolerance the distance tolerance for computing the centre point
    */
   public MaximumInscribedCircle(Geometry polygonal, double tolerance) {
+    if (tolerance <= 0) {
+      throw new IllegalArgumentException("Tolerance must be positive");
+    }
     if (! (polygonal instanceof Polygon || polygonal instanceof MultiPolygon)) {
       throw new IllegalArgumentException("Input geometry must be a Polygon or MultiPolygon");
     }

From 29b747e5b7261e7b7bddf310d3a9176b97daaf46 Mon Sep 17 00:00:00 2001
From: Martin Davis <mtnclimb@gmail.com>
Date: Sun, 21 Feb 2021 16:42:42 -0800
Subject: [PATCH 2/2] Add Javadoc

Signed-off-by: Martin Davis <mtnclimb@gmail.com>
---
 .../jts/algorithm/construct/MaximumInscribedCircle.java        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java b/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
index 3402c47a82..0f5757a36b 100644
--- a/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
+++ b/modules/core/src/main/java/org/locationtech/jts/algorithm/construct/MaximumInscribedCircle.java
@@ -101,7 +101,8 @@ public static LineString getRadiusLine(Geometry polygonal, double tolerance) {
    * Creates a new instance of a Maximum Inscribed Circle computation.
    * 
    * @param polygonal an areal geometry
-   * @param tolerance the distance tolerance for computing the centre point
+   * @param tolerance the distance tolerance for computing the centre point (must be positive)
+   * @throws IllegalArgumentException if the tolerance is non-positive, or the input geometry is non-polygonal or empty.
    */
   public MaximumInscribedCircle(Geometry polygonal, double tolerance) {
     if (tolerance <= 0) {