From 46c78a036dec051bb9e6fb75adbf7fcd6a585301 Mon Sep 17 00:00:00 2001
From: Adeel Ahmad <adeelahmad14@hotmail.com>
Date: Tue, 18 Jul 2017 20:16:34 +0500
Subject: [PATCH] Fix tile_width property in HipsSurveyProperties class

---
 hips/tiles/surveys.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hips/tiles/surveys.py b/hips/tiles/surveys.py
index 28bc65b..f5c462b 100644
--- a/hips/tiles/surveys.py
+++ b/hips/tiles/surveys.py
@@ -128,7 +128,10 @@ def hips_order(self) -> int:
     @property
     def tile_width(self) -> int:
         """HiPS tile width"""
-        return int(self.data['hips_tile_width']) or 512
+        try:
+            return int(self.data['hips_tile_width'])
+        except KeyError:
+            return 512
 
     @property
     def tile_format(self) -> str: