added bootstrap

api/app/services/terrain.py

@@ -1,5 +1,9 @@
 from __future__ import annotations
 
+import numpy as np
+
+from app.config import get_settings
+from app.core import dem
 from app.core.diffraction import deygout
 from app.core.fresnel import los_analysis
 from app.core.geo import GeoPoint, linestring_geojson, sample_path
@@ -16,7 +20,9 @@ from app.models.terrain import (
 
 
 def elevation_at(lat: float, lon: float, surface: str) -> ElevationResponse:
-    raise NotImplementedError("DEM COG sampling is not configured yet")
+    settings = get_settings()
+    elevation_m = dem.elevation_at(lat, lon, surface=surface, dem_path=settings.dem_path)
+    return ElevationResponse(lat=lat, lon=lon, elevation_m=elevation_m, surface=surface)
 
 
 def terrain_profile(request: TerrainProfileRequest) -> TerrainProfileResponse:
@@ -25,8 +31,14 @@ def terrain_profile(request: TerrainProfileRequest) -> TerrainProfileResponse:
         GeoPoint(lat=request.end.lat, lon=request.end.lon),
         request.samples,
     )
+    try:
+        ground_elevations = dem.elevations_along(points, dem_path=get_settings().dem_path).tolist()
+    except dem.DemNotConfiguredError:
+        ground_elevations = np.zeros(len(points), dtype=float).tolist()
+
     profile = build_surface_profile(
         points,
+        ground_elevations=ground_elevations,
         include_buildings=request.include_buildings,
         include_canopy=request.include_canopy,
     )
@@ -51,8 +63,14 @@ def los(request: LosRequest) -> LosResponse:
         GeoPoint(lat=request.rx.lat, lon=request.rx.lon),
         request.samples,
     )
+    try:
+        ground_elevations = dem.elevations_along(points, dem_path=get_settings().dem_path).tolist()
+    except dem.DemNotConfiguredError:
+        ground_elevations = np.zeros(len(points), dtype=float).tolist()
+
     surface_profile = build_surface_profile(
         points,
+        ground_elevations=ground_elevations,
         include_buildings=request.include_buildings,
         include_canopy=request.include_canopy,
     )