detection of nearest METAR

rowers/templates/windedit.html

@@ -52,6 +52,8 @@
 
 	</div>
 	<div class="grid_2 omega">
+          <p>Closest Airport Weather: {{ airport }}
+            ({{ airportdistance | floatformat:-1 }} km)</p>
 	<a class="button green small" href="/rowers/workout/{{ workout.id }}/darkskywind">Dark Sky Data</a>
 	<p>
 	Download wind speed and bearing from <a href="http://forecast.io/">The Dark Sky</a>

rowers/urls.py

@@ -178,6 +178,7 @@ urlpatterns = [
     url(r'^workout/(?P<id>\d+)/wind/c/(?P<message>\w+.*)$',views.workout_wind_view),
     url(r'^workout/(?P<id>\d+)/wind/s/(?P<successmessage>\w+.*)$',views.workout_wind_view),
     url(r'^workout/(?P<id>\d+)/darkskywind$',views.workout_downloadwind_view),
+    url(r'^workout/(?P<id>\d+)/darkskywind/airport/(?P<airportcode>\w+)$',views.workout_downloadwind_view),
     url(r'^workout/(\d+)/stream$',views.workout_stream_view),
     url(r'^workout/(?P<id>\d+)/stream/c/(?P<message>\w+.*)$',views.workout_stream_view),
     url(r'^workout/(\d+)/crewnerdsummary$',views.workout_crewnerd_summary_view),

rowers/views.py

@@ -82,7 +82,7 @@ import mpld3
 from mpld3 import plugins
 import stravalib
 from stravalib.exc import ActivityUploadFailed,TimeoutExceeded
-from weather import get_wind_data
+from weather import get_wind_data,get_airport_code
 
 from oauth2_provider.models import Application,Grant,AccessToken
 
@@ -2435,7 +2435,9 @@ def workout_crewnerd_summary_view(request,id=0,message="",successmessage=""):
 		       'id':row.id})
     
 # Get weather for given location and date/time
-@user_passes_test(ispromember,login_url="/",redirect_field_name=None)
+@user_passes_test(ispromember,login_url="/",redirect_field_name=None)
+def workout_downloadwind_view(request,id=0,
+                              airportcode=None,
                               message="",successmessage=""):
     try:
         row = Workout.objects.get(id=id)
@@ -2536,6 +2538,15 @@ def workout_wind_view(request,id=0,message="",successmessage=""):
 	rowdata.add_bearing()
 	rowdata.write_csv(f1,gzip=True)
 	
+
+    if hascoordinates:
+        avglat = rowdata.df[' latitude'].mean()
+        avglon = rowdata.df[' longitude'].mean()
+        airportcode,newlat,newlon,airportdistance = get_airport_code(avglat,avglon)
+        airportcode = airportcode.upper()
+        airportdistance = airportdistance[0]
+    else:
+        airportcode = 'UNKNOWN'
         airportdistance = 0
         
 
@@ -2593,6 +2604,8 @@ def workout_wind_view(request,id=0,message="",successmessage=""):
 		   'message': message,
 		   'successmessage': successmessage,
 		   'interactiveplot':script,
+		   'form':form,
+                   'airport':airportcode,
                    'airportdistance':airportdistance,
 		   'the_div':div,
 		   'gmap':gmscript,

rowers/weather.py

@@ -2,12 +2,23 @@ import requests
 import json
 import time
 from datetime import datetime
-from rowingdata import rowingdata
+from rowingdata import rowingdata,geo_distance
 import pandas as pd
 from rowers.models import Rower, Workout
 
 from rowsandall_app.settings import FORECAST_IO_KEY
 
+# Find closest airport
+def get_airport_code(lat,lon):
+    metardata = pd.read_csv('rowers/data/metarlatlon.csv')
+    deltasq = (lat-metardata.lat)**2+(lon-metardata.lon)**2
+    a = metardata[deltasq == deltasq.min()]
+    airport_code = a.iloc[0]['icao']
+    newlat = a.iloc[0]['lat']
+    newlon = a.iloc[0]['lon']
+    distance = geo_distance(lat,lon,newlat,newlon)
+    return airport_code,newlat,newlon,distance
+    
 # Get weather data from the DarkSky API
 def get_weather_data(long,lat,unixtime):
     url = "https://api.darksky.net/forecast/"+FORECAST_IO_KEY+"/"