Also parse the extras from the comment field

src/parser.ts

@@ -15,9 +15,7 @@ export const base91ToNumber = (str: string): number => {
     const digit = charCode - 33; // Base91 uses chars 33-123 (! to {)
 
     if (digit < 0 || digit >= base) {
-      throw new Error(
-        `Invalid Base91 character: '${str[i]}' (code ${charCode})`,
-      );
+      throw new Error(`Invalid Base91 character: '${str[i]}' (code ${charCode})`);
     }
 
     value = value * base + digit;
@@ -62,6 +60,15 @@ export const feetToMeters = (feet: number): number => {
   return feet * FEET_TO_METERS;
 };
 
+/**
+ * Convert miles to meters.
+ * @param miles number of miles
+ * @returns meters
+ */
+export const milesToMeters = (miles: number): number => {
+  return miles * 1609.344;
+};
+
 /**
  * Convert altitude from meters to feet.
  *