From 26e1e056f761ae4d58cc2eeae440af9da5b6f50d Mon Sep 17 00:00:00 2001
From: Richard Harrison <rjh@zaretto.com>
Date: Mon, 19 Apr 2021 17:59:20 +0200
Subject: [PATCH] Added limits and default for tower altitude

There are a lot of towers that are at the same altitude as the airport; this is clearly a lack of data. Also there are some towers that are ludicrously high (e.g. KLSV). This commit defines a reasonable minimum and maximum values for tower altitude; together with a default altitude which will be added to the airport elevation when the tower altitude is outside of these ranges (above airpot altitude).
---
 defaults.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/defaults.xml b/defaults.xml
index d901a542b..aa8a6bbb5 100644
--- a/defaults.xml
+++ b/defaults.xml
@@ -839,6 +839,9 @@ Started September 2000 by David Megginson, david@megginson.com
       </record-extra-properties-paths>
     </replay>
     <airport>
+      <min-tower-height-ft type="double">6</min-tower-height-ft>   <!-- a.k.a chap on the ground with a radio waving frantically --> 
+      <max-tower-height-ft type="double">70</max-tower-height-ft>  <!-- the average tower height is 10.51m; so this is a reasonable limit-->
+      <default-tower-height-ft type="double">30</default-tower-height-ft>  <!-- based on the average tower height of ~10.5m-->
       <runways>
         <start-offset-m type="double">5.0</start-offset-m>
         <search>