From 77820394b4ec2748788d43b686141c80ada8062e Mon Sep 17 00:00:00 2001
From: Leonard Kugis <leonard@kug.is>
Date: Fri, 5 Jan 2024 14:24:24 +0100
Subject: Added route process script

---
 scripts/process_route.py | 59 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 scripts/process_route.py

(limited to 'scripts/process_route.py')

diff --git a/scripts/process_route.py b/scripts/process_route.py
new file mode 100644
index 0000000..5242a82
--- /dev/null
+++ b/scripts/process_route.py
@@ -0,0 +1,59 @@
+import json
+import math
+
+def calculate_bearing(lat1, lon1, lat2, lon2):
+    d_lon = lon2 - lon1
+    x = math.cos(math.radians(lat2)) * math.sin(math.radians(d_lon))
+    y = math.cos(math.radians(lat1)) * math.sin(math.radians(lat2)) - \
+        math.sin(math.radians(lat1)) * math.cos(math.radians(lat2)) * math.cos(math.radians(d_lon))
+    bearing = math.atan2(x, y)
+    bearing = math.degrees(bearing)
+    bearing = (bearing + 360) % 360
+    return bearing
+
+def calculate_distance(lat1, lon1, lat2, lon2):
+    R = 6371000  # Earth's radius in meters
+    d_lat = math.radians(lat2 - lat1)
+    d_lon = math.radians(lon2 - lon1)
+    a = math.sin(d_lat / 2) * math.sin(d_lat / 2) + \
+        math.cos(math.radians(lat1)) * math.cos(math.radians(lat2)) * \
+        math.sin(d_lon / 2) * math.sin(d_lon / 2)
+    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a))
+    distance = R * c
+    return distance
+
+def calculate_timestamp(data, current_index):
+    if current_index == 0:
+        return 0
+    else:
+        prev_timestamp = calculate_timestamp(data, current_index - 1)
+        return prev_timestamp + data[current_index-1]['distance'] / data[current_index]['speed']
+
+def process_route(input_filename, output_filename):
+    with open(input_filename, 'r') as infile:
+        data = json.load(infile)
+
+    output_data = []
+
+    for i in range(len(data)):
+        if i == len(data) - 1:
+            data[i]['bearing'] = calculate_bearing(data[i]['latitude'], data[i]['longitude'],
+                                                    data[i-1]['latitude'], data[i-1]['longitude'])
+        else:
+            bearing = calculate_bearing(data[i]['latitude'], data[i]['longitude'],
+                                        data[i+1]['latitude'], data[i+1]['longitude'])
+            data[i]['bearing'] = bearing
+
+            data[i]['distance'] = calculate_distance(data[i]['latitude'], data[i]['longitude'],
+                                                        data[i+1]['latitude'], data[i+1]['longitude'])
+
+        data[i]['timestamp'] = calculate_timestamp(data, i)
+
+        output_data.append(data[i])
+        
+    for d in output_data:
+        d.pop("distance", None)
+
+    with open(output_filename, 'w') as outfile:
+        json.dump(output_data, outfile, indent=2)
+
-- 
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