From e5fde70ca6ca0ea1ef0b02549169192244746224 Mon Sep 17 00:00:00 2001
From: int2001 <joerg@dj7nt.de>
Date: Fri, 6 Mar 2026 16:08:49 +0000
Subject: [PATCH 1/2] Prevent populating unitialized distance-buckets

---
 application/models/Distances_model.php | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/application/models/Distances_model.php b/application/models/Distances_model.php
index f02375b01..0c02ed85e 100644
--- a/application/models/Distances_model.php
+++ b/application/models/Distances_model.php
@@ -172,7 +172,15 @@ class Distances_model extends CI_Model
 			echo json_encode(array('Error' => 'Error. There is a problem with the gridsquare ('.$stationgrid.') set in your profile!'));
 			exit;
 		} else {
-			// Making the array we will use for plotting, we save occurrences of the length of each qso in the array
+			// Build the chart buckets in 50-unit steps up to the max chart distance ($dist).
+			// Each bucket covers a 50-unit range, e.g. in km mode:
+			//   $dataarray[0]   => "0km - 50km"
+			//   $dataarray[1]   => "50km - 100km"
+			//   ...
+			//   $dataarray[399] => "19950km - 20000km"  (last valid index, since 20000/50 - 1 = 399)
+			// A QSO at 31,450 km would map to bucket index 629 (31450/50 = 629),
+			// which is never initialized here, causing "Undefined array key 629" warnings.
+			// The isset() guard further below skips any QSO whose distance exceeds this range.
 			$j = 0;
 			for ($i = 0; $j < $dist; $i++) {
 				$dataarray[$i]['dist'] =  $j . $unit . ' - ' . ($j + 50) . $unit;
@@ -205,6 +213,9 @@ class Distances_model extends CI_Model
 					$qrb['Callsign'] = $qso['callsign'];
 					$qrb['Grid'] = $qso['grid'];
 				}
+				if (!isset($dataarray[$arrayplacement])) {                              // QSO distance exceeds chart range, skip plotting
+					continue;
+				}
 				$dataarray[$arrayplacement]['count']++;                                               // Used for counting total qsos plotted
 				if ($dataarray[$arrayplacement]['callcount'] < 5) {                     // Used for tooltip in graph, set limit to 5 calls shown
 					if ($dataarray[$arrayplacement]['callcount'] > 0) {

From 46cdcaaab65ed79e045fe20cef2833789bd37ad6 Mon Sep 17 00:00:00 2001
From: "Joerg (DJ7NT)" <int2001@users.noreply.github.com>
Date: Fri, 6 Mar 2026 17:48:14 +0100
Subject: [PATCH 2/2] Update max distance values for measurement buckets

Longpath is valid.
---
 application/models/Distances_model.php | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/application/models/Distances_model.php b/application/models/Distances_model.php
index 0c02ed85e..8c6b12e3f 100644
--- a/application/models/Distances_model.php
+++ b/application/models/Distances_model.php
@@ -152,19 +152,19 @@ class Distances_model extends CI_Model
 		switch ($measurement_base) {
 		case 'M':
 			$unit = "mi";
-			$dist = '13000';
+			$dist = '26000';
 			break;
 		case 'K':
 			$unit = "km";
-			$dist = '20000';
+			$dist = '40050';
 			break;
 		case 'N':
 			$unit = "nmi";
-			$dist = '11000';
+			$dist = '22000';
 			break;
 		default:
 			$unit = "km";
-			$dist = '20000';
+			$dist = '40050';
 		}
 
 		if (!$this->valid_locator($stationgrid)) {
@@ -177,10 +177,7 @@ class Distances_model extends CI_Model
 			//   $dataarray[0]   => "0km - 50km"
 			//   $dataarray[1]   => "50km - 100km"
 			//   ...
-			//   $dataarray[399] => "19950km - 20000km"  (last valid index, since 20000/50 - 1 = 399)
-			// A QSO at 31,450 km would map to bucket index 629 (31450/50 = 629),
-			// which is never initialized here, causing "Undefined array key 629" warnings.
-			// The isset() guard further below skips any QSO whose distance exceeds this range.
+			//   till 40050 (longpath)
 			$j = 0;
 			for ($i = 0; $j < $dist; $i++) {
 				$dataarray[$i]['dist'] =  $j . $unit . ' - ' . ($j + 50) . $unit;