[i] always odd number of INCA RR points (to always include the midpoint)

FHSTP/01_data_preparation/prep.py

@@ -301,8 +301,10 @@ def get_inca_data(datetimes: np.array, lon_a: np.array, lat_a: np.array, lon_b:
     
     # define n INCA RR points for each km of link length
     # --> min. points: 3 (start, mid and end) if length < 3km
+    # --> get odd amount of RR points to always include the middle of the link
     n = np.round(lengths, decimals = 0).astype(int)
     n = np.where(n < 3, 3, n)
+    n = np.where(n%2 == 0, n+1, n)
     
     # set list for INCA RR data
     inca_RR = []