initial structure implemented

docs -> _docs

helpers/gsd_calculator.py

@@ -0,0 +1,36 @@
+from models.core import CameraParameters
+
+
+class GSDCalculator:
+    @staticmethod
+    def calculate_gsd(
+        altitude: float,
+        focal_length: float,
+        sensor_width: float,
+        image_width: int,
+    ) -> float:
+        raise NotImplementedError
+
+    @staticmethod
+    def calculate_footprint(
+        altitude: float,
+        camera_params: CameraParameters,
+    ) -> tuple[float, float]:
+        raise NotImplementedError
+
+    @staticmethod
+    def altitude_for_gsd(
+        target_gsd: float,
+        focal_length: float,
+        sensor_width: float,
+        image_width: int,
+    ) -> float:
+        raise NotImplementedError
+
+    @staticmethod
+    def calculate_coverage_radius(
+        altitude: float,
+        camera_params: CameraParameters,
+    ) -> float:
+        raise NotImplementedError
+