change display on categories

config/geographical_calculator.php

@@ -0,0 +1,34 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | units values
+    |--------------------------------------------------------------------------
+    | your custom units, the initial units its convert from mile to any value.
+    |
+    */
+    'units' => [
+        'mile' => 1,
+        'km' => 1.609344,
+        'm' => (1.609344 * 1000),
+        'cm' => (1.609344 * 100),
+        'mm' => (1.609344 * 1000 * 1000),
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | distance_key_prefix
+    |--------------------------------------------------------------------------
+    | if you declared more than tow points to resolve their distance,
+    | you will see the result in the following format:
+    | "1-2" => ["km" => "some result"],
+    | "2-3" => ["km" => "some result"],
+    | "3-4" => ["km" => "some result"],
+    | and if you want to set any prefix before each index
+    | you must change the below value to any value you want.
+    |
+    */
+    'distance_key_prefix' => '',
+];