fix(coverage): round derived coords to 6dp; skip roadless traffic cells (#66)

USGS rejects bBox coords with >7 decimals (raw Leaflet clicks have 14) —
round all coverage-derived coordinates to 6dp so USGS/others accept them.
TomTom flow 400 ("Point too far from nearest existing segment") on rural
grid cells is expected no-data, not an error — log debug and skip instead
of warning. Fix the fires log to not claim "in US-ID" under coverage mode.

Co-authored-by: Matt Johnson <mj@k7zvx.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

work/meshai/coverage.py

@@ -73,9 +73,14 @@ def bbox_intersects(a, b) -> bool:
 
 
 def centroid(bbox) -> tuple[float, float]:
-    """Return the (lat, lon) center of *bbox* = [W, S, E, N]."""
+    """Return the (lat, lon) center of *bbox* = [W, S, E, N].
+
+    Coordinates are rounded to 6 decimal places (≈0.11 m precision) so that
+    values derived from high-precision Leaflet clicks never exceed external API
+    decimal-place limits.
+    """
     west, south, east, north = bbox
-    return ((south + north) / 2.0, (west + east) / 2.0)
+    return (round((south + north) / 2.0, 6), round((west + east) / 2.0, 6))
 
 
 def grid_points(bbox, cols: int = 3, rows: int = 3) -> list[tuple[float, float]]:
@@ -95,7 +100,7 @@ def grid_points(bbox, cols: int = 3, rows: int = 3) -> list[tuple[float, float]]
         lat = south + (row + 0.5) * lat_step
         for col in range(cols):
             lon = west + (col + 0.5) * lon_step
-            points.append((lat, lon))
+            points.append((round(lat, 6), round(lon, 6)))
     return points
 
 
@@ -323,7 +328,9 @@ def resolve_adapter_coverage(
     if adapter in _GLOBAL_ADAPTERS:
         return None
 
-    bbox = list(coverage_bbox)  # defensive copy
+    # Defensive copy + precision cap: raw Leaflet clicks produce 14+ decimal
+    # places which USGS (and others) reject.  6dp ≈ 0.11 m — more than enough.
+    bbox = [round(float(c), 6) for c in coverage_bbox]
 
     if adapter in ("fires", "wfigs", "nicf"):
         return {

work/meshai/env/fires.py

@@ -195,7 +195,8 @@ class NICFFiresAdapter:
         self._is_loaded = True
 
         if changed:
-            logger.info(f"NIFC fires updated: {len(new_events)} active in {self._state}")
+            loc = "the coverage area" if self._coverage is not None else self._state
+            logger.info(f"NIFC fires updated: {len(new_events)} active in {loc}")
 
         return changed
 

work/meshai/env/traffic.py

@@ -162,10 +162,19 @@ class TomTomTrafficAdapter:
             if e.code == 401 or e.code == 403:
                 logger.error(f"TomTom auth error: {e.code} - check API key")
                 self._last_error = f"Auth error {e.code}"
+                self._consecutive_errors += 1
+            elif e.code == 400:
+                # "Point too far from nearest existing segment" — expected for
+                # wilderness/rural grid cells with no TomTom road data.
+                # This is not an error; the cell simply has no data.
+                logger.debug(
+                    "TomTom: no road segment near %s (%.5f,%.5f) — skipping",
+                    name, lat, lon,
+                )
             else:
                 logger.warning(f"TomTom HTTP error for {name}: {e.code}")
                 self._last_error = f"HTTP {e.code}"
-            self._consecutive_errors += 1
+                self._consecutive_errors += 1
             return None
 
         except URLError as e:

work/tests/test_adapter_traffic.py

@@ -1,7 +1,8 @@
 """Tests for TomTom traffic adapter Phase 2.7 — to_event() method."""
 
 import time
-from unittest.mock import MagicMock
+from unittest.mock import MagicMock, patch
+from urllib.error import HTTPError
 
 import pytest
 
@@ -203,3 +204,48 @@ def test_to_event_missing_properties_returns_none(adapter):
 def test_to_event_does_not_raise_on_corrupted_dict(adapter):
     """Corrupted dict returns None without raising."""
     assert adapter.to_event({"garbage": True}) is None
+
+
+# ============================================================
+# _fetch_point 400 — roadless cell is no-data, not an error
+# ============================================================
+
+def test_fetch_point_400_does_not_set_last_error(mock_config):
+    """A 400 HTTPError (roadless cell) must not set _last_error or increment
+    consecutive_errors — it is expected no-data, not a failure."""
+    adapter = TomTomTrafficAdapter(mock_config)
+    assert adapter._last_error is None
+    assert adapter._consecutive_errors == 0
+
+    err = HTTPError(
+        url="https://api.tomtom.com/...",
+        code=400,
+        msg="Bad Request",
+        hdrs=None,
+        fp=None,
+    )
+    with patch("meshai.env.traffic.urlopen", side_effect=err):
+        result = adapter._fetch_point("wilderness_cell", 43.5, -115.0, 0.0)
+
+    assert result is None, "400 must return None (no data)"
+    assert adapter._last_error is None, "_last_error must not be set on 400"
+    assert adapter._consecutive_errors == 0, "consecutive_errors must not increment on 400"
+
+
+def test_fetch_point_non400_http_error_sets_last_error(mock_config):
+    """Non-400/401/403 HTTP errors (e.g. 503) must still set _last_error."""
+    adapter = TomTomTrafficAdapter(mock_config)
+
+    err = HTTPError(
+        url="https://api.tomtom.com/...",
+        code=503,
+        msg="Service Unavailable",
+        hdrs=None,
+        fp=None,
+    )
+    with patch("meshai.env.traffic.urlopen", side_effect=err):
+        result = adapter._fetch_point("some_corridor", 43.5, -116.0, 0.0)
+
+    assert result is None
+    assert adapter._last_error == "HTTP 503"
+    assert adapter._consecutive_errors == 1

work/tests/test_coverage.py

@@ -473,3 +473,69 @@ def test_resolve_does_not_mutate_input_bbox():
     result = resolve_adapter_coverage("usgs_quake", original)
     result["bbox"].append(999)  # mutate return value
     assert len(original) == 4  # original untouched
+
+
+# ===========================================================================
+# Coordinate precision — all outputs must be ≤6 decimal places (Fix 1)
+# ===========================================================================
+
+# Raw Leaflet map-click bbox: ~14 decimal places, triggers USGS HTTP 400.
+HIGH_PREC_BOX = [
+    -116.99340820312501,
+    41.95949009892467,
+    -110.98388671875001,
+    44.09547572946637,
+]
+
+
+def _decimal_places(v) -> int:
+    """Return significant decimal places in *v* (trailing zeros not counted)."""
+    s = f"{float(v):.10f}"
+    decimal_part = s.split(".")[1]
+    stripped = decimal_part.rstrip("0")
+    return len(stripped) if stripped else 0
+
+
+def _assert_max_6dp(v, label: str = "") -> None:
+    """Assert float *v* has at most 6 decimal places."""
+    n = _decimal_places(v)
+    assert n <= 6, f"{label}: {v!r} has {n} decimal places (max 6)"
+
+
+def test_high_precision_bbox_coords_rounded():
+    """bbox key in every adapter that returns one must have ≤6dp per coordinate."""
+    bbox_adapters = ("usgs_quake", "firms", "roads511", "usgs", "nws", "wzdx",
+                     "fires", "wfigs", "nicf")
+    for adapter in bbox_adapters:
+        result = resolve_adapter_coverage(adapter, HIGH_PREC_BOX)
+        assert result is not None, f"{adapter} unexpectedly returned None"
+        if "bbox" in result:
+            for i, coord in enumerate(result["bbox"]):
+                _assert_max_6dp(coord, f"{adapter}.bbox[{i}]")
+
+
+def test_high_precision_envelope_geometry_rounded():
+    """ArcGIS envelope geometry string coords must have ≤6dp (fires adapter)."""
+    result = resolve_adapter_coverage("fires", HIGH_PREC_BOX)
+    assert result is not None
+    geom = result["envelope"]["geometry"]
+    for part in geom.split(","):
+        _assert_max_6dp(part.strip(), f"fires.envelope.geometry part {part!r}")
+
+
+def test_high_precision_centroid_rounded():
+    """centroid() computed from a high-precision bbox must have ≤6dp per coord."""
+    result = resolve_adapter_coverage("satpass", HIGH_PREC_BOX)
+    assert result is not None
+    lat, lon = result["centroid"]
+    _assert_max_6dp(lat, "satpass.centroid.lat")
+    _assert_max_6dp(lon, "satpass.centroid.lon")
+
+
+def test_high_precision_grid_points_rounded():
+    """All grid_points() coords from a high-precision bbox must have ≤6dp."""
+    result = resolve_adapter_coverage("traffic", HIGH_PREC_BOX)
+    assert result is not None
+    for i, (plat, plon) in enumerate(result["points"]):
+        _assert_max_6dp(plat, f"traffic.points[{i}].lat")
+        _assert_max_6dp(plon, f"traffic.points[{i}].lon")