From 7acd8c1aaa4dcff40100fd100ca488d2f0a74916 Mon Sep 17 00:00:00 2001
From: Furrtek <furrtek@gmail.com>
Date: Mon, 8 Jan 2018 03:09:51 +0000
Subject: [PATCH] Update README.md

---
 sdcard/README.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sdcard/README.md b/sdcard/README.md
index 0c907437..807baad7 100644
--- a/sdcard/README.md
+++ b/sdcard/README.md
@@ -1,9 +1,10 @@
 # How to generate world_map.bin
 
-World_map.bin is a huge (~450MB) raw image file in a format that can be easily rendered by the PortaPack.
+World_map.bin is required if you want to use the world map view in some apps. It's a huge (~450MB) raw image file in a format that can be easily rendered by the PortaPack.
+
 Since Github doesn't allow uploading such large files, you must generate it yourself from the provided jpg file.
 
 1. Make sur that `world_map.jpg` is in `/sdcard/ADSB`.
 1. Go in `/firmware/tools`.
 1. Run 'python adsb_map.py'. Give it some time.
-1. `world_map.bin` should appear !
+1. `world_map.bin` should appear ! Leave it in the ADSB directory.