도면 출력 추가: 수리 종단면도, 관망도(색인도·부분도·수압표), 범례·색상 선택, DXF(AutoCAD 2018)

- 데모 v2 이후 개발 PC의 변경을 옮김 (이 저장소의 이름 변경·README 정리는 유지)
- 서버 기본 DEM, DEM 등고선, 속성 테이블 범위 선택, WNTR 교차 검증 시험 포함
- 새 라이브러리: ezdxf(Python), maplibre-contour(npm)
- 변경 내역: docs/SPipe_패치내역_도면출력_2026-11-06.txt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/tests/test_wntr_crosscheck.py

@@ -0,0 +1,78 @@
+"""Cross-check SPipe's server analyses against USEPA WNTR (an independent EPANET
+front end). Skipped when wntr is not installed (it is a dev-only dependency).
+
+WNTR works in SI (m, m³/s); Net1/Net3 are US units (psi, GPM), so values are
+converted before comparing. WNTR bundles its own EPANET build, so small
+numerical differences are allowed.
+"""
+import os
+import tempfile
+from pathlib import Path
+
+import numpy as np
+import pytest
+
+from backend.batch import Network
+from backend.epanet import EN
+from backend.jobs import job_criticality, job_fireflow
+
+wntr = pytest.importorskip("wntr")
+
+PUBLIC = Path(__file__).resolve().parents[2] / "public"
+PSI_TO_M = 0.3048 / 0.4333  # EPANET's own psi <-> ft of water factor
+GPM_TO_M3S = 6.30902e-5
+
+
+def wntr_pressure(wn) -> "object":
+    with tempfile.TemporaryDirectory() as tmp:
+        res = wntr.sim.EpanetSimulator(wn).run_sim(file_prefix=os.path.join(tmp, "w"))
+    return res.node["pressure"]
+
+
+def spipe_pressure(inp: bytes) -> dict:
+    with Network(inp) as n:
+        js = n.junction_indices()
+        r = n.simulate(node_props=(EN.PRESSURE,), nodes=js)
+        return {n.node_ids[j - 1]: r.nodes[EN.PRESSURE][:, k] * PSI_TO_M for k, j in enumerate(js)}, r.times
+
+
+@pytest.mark.parametrize("name", ["Net1.inp", "Net3.inp"])
+def test_baseline_pressures_match(name):
+    path = PUBLIC / name
+    ours, times = spipe_pressure(path.read_bytes())
+    p = wntr_pressure(wntr.network.WaterNetworkModel(str(path)))
+    diffs = []
+    for nid, series in ours.items():
+        w = p[nid].reindex(times).to_numpy()
+        diffs.append(np.nanmax(np.abs(series - w)))
+    assert max(diffs) < 0.01, f"max pressure difference {max(diffs):.3f} m"
+
+
+def test_pipe_criticality_matches_closing_pipes_in_wntr():
+    path = PUBLIC / "Net1.inp"
+    ours = {e["id"]: e for e in job_criticality(path.read_bytes(), {"threshold": 40})["links"]}
+    checked = 0
+    for pid, e in ours.items():
+        if e.get("disconnected") or e.get("minPressure") is None:
+            continue  # isolated nodes: both engines report meaningless negative heads
+        wn = wntr.network.WaterNetworkModel(str(path))
+        wn.get_link(pid).initial_status = wntr.network.LinkStatus.Closed
+        p = wntr_pressure(wn)
+        junctions = [n for n, _ in wn.junctions()]
+        wmin = float(p[junctions].min().min())
+        assert abs(e["minPressure"] * PSI_TO_M - wmin) < 0.01, f"pipe {pid}: {e['minPressure'] * PSI_TO_M:.2f} vs {wmin:.2f} m"
+        checked += 1
+    assert checked >= 10
+
+
+def test_fire_flow_pressure_drop_matches_extra_demand_in_wntr():
+    path = PUBLIC / "Net1.inp"
+    flow_gpm = 500.0
+    r = job_fireflow(path.read_bytes(), {"nodes": ["22"], "flow": flow_gpm, "start": 0, "end": 24})
+    ours = r["hydrants"][0]["firePressure"] * PSI_TO_M
+    wn = wntr.network.WaterNetworkModel(str(path))
+    # A demand without a pattern would get Net1's default pattern (up to 1.6x); fire flow is constant.
+    wn.add_pattern("fire_const", [1.0])
+    wn.get_node("22").add_demand(flow_gpm * GPM_TO_M3S, "fire_const", "fire")
+    p = wntr_pressure(wn)
+    assert abs(ours - float(p["22"].min())) < 0.01