update with colours

kml.py

@@ -1,18 +1,27 @@
 import pandas
 from fastkml import kml
 from fastkml.geometry import Geometry
-from fastkml.styles import LineStyle
+from fastkml.styles import Style, LineStyle
 from shapely.geometry import Point, LineString
+from colour import Color
+
+colours = list(Color("#ff0000").range_to(Color("#00ffff"), 256))
 
 k = kml.KML()
 d = kml.Document()
-line = []
 
 df = pandas.read_csv('combined.csv')
 df_s = [(i.lng, i.lat, i.altitude * 0.3048) for i in df.itertuples()]
+min_alt, max_alt = min(j[-1] for j in df_s), max(j[-1] for j in df_s)
 
 for j in range(len(df_s)-1):
-    p = kml.Placemark()
+    this_alt = (df_s[j][-1] + df_s[j+1][-1]) / 2
+    this_colour = colours[int((this_alt-min_alt)/(max_alt-min_alt)*255)].hex_l
+
+    p = kml.Placemark(styles=[Style(styles=[LineStyle(
+        color=f'ff{this_colour[5:7]}{this_colour[3:5]}{this_colour[1:3]}',
+        width=2
+    )])])
     p.geometry = Geometry(geometry=LineString([
         Point(*df_s[j]),
         Point(*df_s[j+1]),