diff --git a/lib/xmet/hodograph.py b/lib/xmet/hodograph.py
index ca469e9..a749016 100644
--- a/lib/xmet/hodograph.py
+++ b/lib/xmet/hodograph.py
@@ -21,13 +21,13 @@ def knots(ms: float) -> float:
 
 class Hodograph():
     def __init__(self, width, height):
-        self.scale    = 1.2
+        self.zoom     = 1.2
         self.offset_x = 0.1
         self.offset_y = 0.9
 
         self.width  = min(width, height)
         self.height = min(width, height)
-        self.radius = min(width, height) * self.scale
+        self.radius = min(width, height) * self.zoom
 
     def sample_to_screen(self, wind_speed: dir, wind_dir: float) -> tuple:
         r = self.radius * min(wind_speed, WIND_SPEED_MAX) / WIND_SPEED_MAX