add custom gpm and gpdm units

metpy's gpm is defined as m,
we need the correct 9.81 * J/kg

1 files changed, 7 insertions, 0 deletions

diff --git a/run.py b/run.py
index 7439bfb..9ba7024 100755
--- a/run.py
+++ b/run.py
@@ -4,6 +4,13 @@ import sys
 import yaml
 import matplotlib.pyplot as plt
 
+from metpy.units import units
+
+# Define custom gpm and gpdm units. The default gpm in metpy is aliased to meter.
+# We need the correct definition
+units.define('_gpm = 9.80665 * J/kg')
+units.define('_gpdm = 10 * _gpm')
+
 FILE = 'config.yaml'
 if len(sys.argv) > 1:
     FILE = sys.argv[1]