diff --git a/map_display.py b/map_display.py
new file mode 100644
index 0000000..a09e081
--- /dev/null
+++ b/map_display.py
@@ -0,0 +1,30 @@
+from typing import Optional
+
+import pygame
+
+
+class MapDisplay:
+    PATH_WIDTH = 5
+
+    def __init__(self, surf: pygame.Surface, min_lat: float, max_lat: float, min_lon: float, max_lon: float):
+        self.surf: pygame.Surface = surf
+        self.min_lat: float = min_lat
+        self.max_lat: float = max_lat
+        self.min_lon: float = min_lon
+        self.max_lon: float = max_lon
+
+    def real_to_screen(self, lat: float, lon: float) -> tuple[float, float]:
+        x = (lon - self.min_lon) / (self.max_lon - self.min_lon)
+        y = (lat - self.min_lat) / (self.max_lat - self.min_lat)
+
+        w, h = self.surf.get_size()
+        return x * w, y * h
+
+    def draw_path(self, path: list[tuple[int, int]], colors: Optional[list[tuple[int, int, int]]]) -> None:
+        for i, (lat, lon) in enumerate(path):
+            x, y = self.real_to_screen(lat, lon)
+            col = (255, 255, 255) if colors is None else colors[i]
+            pygame.draw.circle(self.surf, col, (x, y), self.PATH_WIDTH)
+
+    def draw_segment(self, path: list[tuple[int, int]], start_i: int, end_i: int) -> None:
+        raise NotImplementedError
diff --git a/path.py b/path.py
new file mode 100644
index 0000000..c3a6ebe
--- /dev/null
+++ b/path.py
@@ -0,0 +1,30 @@
+from vec import Vec2
+
+
+class Path:
+    def __init__(self, points: list[Vec2], extra_data: list):
+        self.points: list[Vec2] = points
+        self.extra_data = extra_data
+        self.vecs: list[Vec2] = []
+        self._init_vecs()
+
+    def _init_vecs(self) -> None:
+        for i in range(1, len(self.points) - 1):
+            pt1 = self.points[i-1]
+            pt2 = self.points[i]
+            pt3 = self.points[i+1]
+            d1 = pt1 - pt2
+            d2 = pt3 - pt2
+
+            l1 = d1.mag
+            l2 = d2.mag
+
+            d1 = d1.normalized()
+            d2 = d1.normalized()
+
+            d = d1 + d2
+            d = d.normalized()
+            if d2.cross(d) < 0:
+                d = -d
+
+            self.vecs.append(d)
diff --git a/vec.py b/vec.py
new file mode 100644
index 0000000..185e49d
--- /dev/null
+++ b/vec.py
@@ -0,0 +1,35 @@
+from math import sqrt
+
+
+class Vec2:
+    def __init__(self, x: float = 0, y: float = 0):
+        self.x: float = x
+        self.y: float = y
+
+    @property
+    def mag(self) -> float:
+        return sqrt(self.x ** 2 + self.y ** 2)
+
+    def normalized(self) -> "Vec2":
+        mag = self.mag
+        if mag == 0:
+            return Vec2()
+        return self / mag
+
+    def __add__(self, v: "Vec2") -> "Vec2":
+        return Vec2(self.x + v.x, self.y + v.y)
+
+    def __sub__(self, v: "Vec2") -> "Vec2":
+        return Vec2(self.x - v.x, self.y - v.y)
+
+    def __mul__(self, f: float) -> "Vec2":
+        return Vec2(self.x * f, self.y * f)
+
+    def __truediv__(self, f: float) -> "Vec2":
+        return Vec2(self.x / f, self.y / f)
+
+    def __neg__(self) -> "Vec2":
+        return Vec2(-self.x, -self.y)
+
+    def cross(self, v: "Vec2") -> float:
+        return self.x * v.y - self.y * v.x