Data-treatment.md

@@ -32,3 +32,10 @@ for pt in pts :
         new_pt.append(p)
     print(new_pt)  
 ```
+# Cell fraction to area
+```
+grid_surface = np.zeros((len(latitudes),len(longitudes))) # dim [30,33]
+            for lat,latitude in enumerate(latitudes) :
+                for lon,longitude in enumerate(longitudes) :
+                    grid_surface[lat][lon] = 110 * 110 * math.cos(math.pi*latitude/180) * 1/2 * 1/2 * 100 #in ha
+```
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