added covarage

api/app/services/vegetation.py

@@ -5,7 +5,7 @@ from pathlib import Path
 from app.config import get_settings
 from app.core.geo import PathPoint
 from app.core.landcover import LandcoverNotConfiguredError, landcover_path
-from app.core.vegetation import P833Coefficients, p833_attenuation
+from app.core.vegetation import p833_attenuation, p833_coefficients_for_class
 
 
 def vegetation_loss_along(
@@ -27,13 +27,16 @@ def vegetation_loss_along(
     except LandcoverNotConfiguredError:
         return 0.0
 
-    coefficients = P833Coefficients(
-        gamma_db_per_m=settings.p833_gamma_db_per_m,
-        max_attenuation_db=settings.p833_max_attenuation_db,
-    )
+    dominant_class = "unknown"
+    if path.segments:
+        dominant_class = max(
+            path.segments,
+            key=lambda segment: segment.to_m - segment.from_m,
+        ).class_name
+
     return p833_attenuation(
         depth_m=path.vegetation_depth_m,
         freq_hz=freq_hz,
-        forest_type="unknown",
-        coefficients=coefficients,
+        forest_type=dominant_class,
+        coefficients=p833_coefficients_for_class(dominant_class),
     )