Add marker in trajectories map

src/analysis/assets/train-marker.svg

+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1"
+         id="svg4619" inkscape:version="0.91+devel+osxmenu r12911" sodipodi:docname="triangle-15.svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:svg="http://www.w3.org/2000/svg"
+         xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="15px" height="15px"
+         viewBox="0 0 15 15" style="enable-background:new 0 0 15 15;" xml:space="preserve">
+<path id="path21090-9" inkscape:connector-curvature="0" sodipodi:nodetypes="sscsssscss" d="M7.5385,2
+        C7.2437,2,7.0502,2.1772,6.9231,2.3846l-5.8462,9.5385C1,12,1,12.1538,1,12.3077C1,12.8462,1.3846,13,1.6923,13h11.6154
+        C13.6923,13,14,12.8462,14,12.3077c0-0.1538,0-0.2308-0.0769-0.3846L8.1538,2.3846C8.028,2.1765,7.7882,2,7.5385,2z"/>
+</svg>

src/analysis/trajectories_map.py

 import itertools
 import logging
+import pathlib
 import typing as t
 import webbrowser
 from collections import defaultdict
@@ -47,6 +48,9 @@ for k in _color_map:
     COLOR_MAP[k] = _color_map[k]
 
 
+ASSETS_PATH = pathlib.Path("./src/analysis/assets/").resolve()
+
+
 def fill_time(start: datetime, end: datetime) -> t.Generator[datetime, None, None]:
     """Generate a consecutive list of times between the 'start' and 'end' period.
 
@@ -101,13 +105,8 @@ def train_stop_geojson(st: pd.DataFrame, train: pd.DataFrame) -> list[dict]:
             # The station location can't be retrieved
             continue
 
-        prev_time: datetime | None = prev.departure_expected
-        if prev.departure_actual:
-            prev_time = prev.departure_actual
-
-        curr_time: datetime | None = curr.arrival_expected
-        if curr.arrival_actual:
-            curr_time = curr.arrival_actual
+        prev_time: datetime | None = prev.departure_actual or prev.departure_expected
+        curr_time: datetime | None = curr.arrival_actual or curr.arrival_expected
 
         # Sanity check: _time must be not null
         if not prev_time or not curr_time:
@@ -123,7 +122,8 @@ def train_stop_geojson(st: pd.DataFrame, train: pd.DataFrame) -> list[dict]:
             continue
 
         for timestamp in fill_time(prev_time, curr_time):
-            ret.append(
+            ret.extend(
+                [
                     {
                         "type": "Feature",
                         "geometry": {
@@ -143,7 +143,40 @@ def train_stop_geojson(st: pd.DataFrame, train: pd.DataFrame) -> list[dict]:
                                 else MIN_WEIGHT,
                             },
                         },
-                }
+                    },
+                    {
+                        "type": "Feature",
+                        "geometry": {
+                            "type": "Point",
+                            "coordinates": (curr_st.longitude, curr_st.latitude),
+                        },
+                        "properties": {
+                            "icon": "marker",
+                            "iconstyle": {
+                                "iconUrl": str(ASSETS_PATH / "train-marker.svg"),
+                                "iconSize": [24, 24],
+                                "fillOpacity": 1,
+                            },
+                            "tooltip": (
+                                f"<b>{curr.client_code}</b> &#8729; <b>{curr.category}</b> <b>{curr.number}</b>"
+                                f"<dd>{prev_st.long_name} "
+                                f"{f'({round(prev.departure_delay, 1):+g} min)' if not np.isnan(prev.departure_delay) else ''}"
+                                f" &rarr; "
+                                f"{curr_st.long_name} "
+                                f"{f' ({round(prev.arrival_delay, 1):+g} min)' if not np.isnan(prev.arrival_delay) else ''}"
+                            ),
+                            "name": "",
+                            "times": [timestamp.isoformat()],
+                            "style": {
+                                "color": COLOR_MAP[curr.client_code],
+                                "weight": int(curr.crowding / 10)
+                                if not np.isnan(curr.crowding)
+                                and curr.crowding > MIN_WEIGHT * 10
+                                else MIN_WEIGHT,
+                            },
+                        },
+                    },
+                ]
             )
 
     return ret