feat: draft per-station ground/grade values from profile ruler (sheet 002)

Ruler 4+740..5+480 (38 stations, 20 m). Two decimal series per station:
A (|across|~33 m) varies with terrain; B (|across|~16 m) rises ~0.498 m per
station (2.49% grade). Series naming and the ruler scale (chord ~21.27 m per
20 m station) are left to HITL. Output is a draft; no value is adjusted.

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A5Cun3RHQKna9qxE6ybZ4A

data/profile_gl_002_draft.csv

@@ -0,0 +1,77 @@
+station_anchor,est_station,across_m,value,x,y
+4740,4738.3,-32.81,65.969,150794.75,483555.28
+4740,4738.3,-16.41,50.495,150809.32,483562.8
+4760,4758.4,-31.48,70.818,150805.68,483536.98
+4760,4758.4,-16.41,50.993,150819.07,483543.89
+4780,4778.4,-32.81,72.725,150814.25,483517.47
+4780,4778.4,-15.97,51.492,150829.22,483525.19
+4800,4798.5,-31.48,82.17,150825.19,483499.17
+4800,4798.5,-15.53,51.99,150839.37,483506.48
+4820,4818.5,-32.81,92.372,150833.76,483479.65
+4820,4818.5,-16.86,52.488,150847.94,483486.97
+4840,4838.6,-33.7,100.775,150842.73,483460.34
+4840,4838.6,-16.86,52.986,150857.69,483468.06
+4860,4858.6,-33.26,109.7,150852.87,483441.63
+4860,4858.6,-16.86,53.485,150867.45,483449.15
+4880,4878.6,-32.81,119.9,150863.02,483422.93
+4880,4878.6,-16.86,53.983,150877.2,483430.25
+4900,4898.7,-33.26,130.6,150872.38,483403.82
+4900,4898.7,-15.97,54.481,150887.74,483411.74
+4920,4918.7,-31.93,141.1,150883.32,483385.52
+4920,4918.7,-16.41,54.98,150897.1,483392.63
+4940,4938.8,-34.59,152.277,150890.71,483365.4
+4940,4938.8,-16.86,55.478,150906.46,483373.52
+4960,4958.8,-34.59,155.393,150900.46,483346.49
+4960,4958.8,-16.86,55.976,150916.22,483354.62
+4980,4978.9,-34.14,149.607,150910.61,483327.79
+4980,4978.9,-16.86,56.474,150925.97,483335.71
+5000,4998.9,-33.7,144.2,150920.75,483309.08
+5000,4998.9,-16.86,56.973,150935.72,483316.8
+5020,5019.0,-34.59,145.422,150929.72,483289.77
+5020,5019.0,-15.97,57.471,150946.26,483298.3
+5040,5039.0,-34.59,142.999,150939.47,483270.86
+5040,5039.0,-16.86,57.969,150955.23,483278.99
+5060,5059.0,-34.14,142.606,150949.62,483252.16
+5060,5059.0,-16.86,58.467,150964.98,483260.08
+5080,5079.1,-34.59,142.244,150958.98,483233.05
+5080,5079.1,-16.86,58.966,150974.74,483241.18
+5100,5099.1,-34.59,145.737,150968.73,483214.14
+5100,5099.1,-16.86,59.464,150984.49,483222.27
+5120,5119.2,-32.81,148.1,150980.06,483196.05
+5120,5119.2,-16.86,59.962,150994.24,483203.36
+5140,5139.2,-33.26,146.041,150989.42,483176.94
+5140,5139.2,-15.97,60.46,151004.79,483184.86
+5160,5159.3,-32.81,146.118,150999.57,483158.23
+5160,5159.3,-16.41,60.959,151014.15,483165.75
+5180,5179.3,-34.59,147.947,151007.75,483138.51
+5180,5179.3,-15.97,61.457,151024.29,483147.05
+5200,5199.4,-33.7,152.8,151018.29,483120.01
+5200,5199.4,-15.97,61.955,151034.05,483128.14
+5220,5219.4,-33.7,157.214,151028.04,483101.1
+5220,5219.4,-16.86,62.453,151043.01,483108.83
+5240,5239.5,-33.7,155.7,151037.8,483082.2
+5240,5239.5,-16.86,62.952,151052.77,483089.92
+5260,5259.5,-34.59,146.424,151046.76,483062.88
+5260,5259.5,-16.41,63.45,151062.91,483071.22
+5280,5279.5,-33.7,138.6,151057.3,483044.38
+5280,5279.5,-16.86,63.948,151072.27,483052.11
+5300,5299.6,-33.7,140.039,151067.06,483025.48
+5300,5299.6,-16.86,64.446,151082.03,483033.2
+5320,5319.6,-34.14,130.368,151076.42,483006.37
+5320,5319.6,-16.86,64.933,151091.78,483014.29
+5340,5339.7,-33.26,117.65,151086.96,482987.87
+5340,5339.7,-16.86,65.378,151101.53,482995.38
+5360,5359.7,-33.26,107.3,151096.71,482968.96
+5360,5359.7,-15.97,65.781,151112.07,482976.88
+5380,5379.8,-34.14,103.593,151105.68,482949.65
+5380,5379.8,-15.97,66.142,151121.83,482957.98
+5400,5399.8,-33.7,109.032,151115.83,482930.94
+5400,5399.8,-16.41,66.46,151131.19,482938.87
+5420,5419.9,-32.81,108.108,151126.37,482912.44
+5420,5419.9,-16.86,66.737,151140.55,482919.76
+5440,5439.9,-31.93,98.183,151136.91,482893.94
+5440,5439.9,-16.41,66.97,151150.7,482901.05
+5460,5460.0,-31.93,88.124,151146.66,482875.03
+5460,5460.0,-15.97,67.162,151160.84,482882.35
+5480,5480.0,-30.6,81.014,151157.6,482856.74
+5480,5480.0,-15.08,67.311,151171.38,482863.85

scripts/extract_profile_gl.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+"""Task 3 (user-confirmed reading): ground-level and design-grade values per
+20 m station from sheet 02-002 (당진방향).
+
+Confirmed by the user (2026-10-21): decimal texts in CR-TABL-TEX2 are 지반고 (GL),
+sheet 002 values used; the ruler 740.00..980.00 is chainage 4+740..4+980, and
+0.00 is 5+000 (ruler continues in 20 m steps).
+Method: ruler texts give anchors (chainage = 4000+v for 740..980; 5000+v after 0.00).
+Each decimal text is projected onto the ruler axis; its station is the nearest anchor.
+Two decimal series appear at each station (|across| ~ 17-21 and ~ 32-39 m);
+the series names are NOT assigned here (HITL). Checks are reported, not forced."""
+import csv
+import math
+import re
+import sys
+
+import ezdxf
+
+SRC, OUT = sys.argv[1], sys.argv[2]
+msp = ezdxf.readfile(SRC).modelspace()
+texts = [(e.dxf.insert.x, e.dxf.insert.y, e.dxf.text.strip())
+         for e in msp.query("TEXT") if e.dxf.layer == "CR-TABL-TEX2"]
+
+ruler = {}
+for x, y, s in texts:
+    if re.fullmatch(r"\d{1,3}\.00", s):
+        ruler[int(s.split(".")[0])] = (x, y)
+anchors = {}
+for v in range(740, 1000, 20):
+    if v in ruler:
+        anchors[4000 + v] = ruler[v]
+for v in range(0, 1000, 20):
+    if v in ruler:
+        anchors[5000 + v] = ruler[v]
+    else:
+        break
+stas = sorted(anchors)
+print("anchors:", len(stas), "range", stas[0], "..", stas[-1])
+gaps = [(stas[i + 1] - stas[i], round(math.dist(anchors[stas[i]], anchors[stas[i + 1]]), 2))
+        for i in range(len(stas) - 1)]
+print("consecutive (dSTA, chord m):", gaps)
+
+A0, A1 = anchors[stas[0]], anchors[stas[-1]]
+L = math.dist(A0, A1)
+u = ((A1[0] - A0[0]) / L, (A1[1] - A0[1]) / L)
+v_ = (-u[1], u[0])
+rows = []
+for x, y, s in texts:
+    if not re.fullmatch(r"\d{1,3}\.\d{3}", s):
+        continue
+    dx, dy = x - A0[0], y - A0[1]
+    along = dx * u[0] + dy * u[1]
+    across = dx * v_[0] + dy * v_[1]
+    if not (-5.0 <= along <= L + 5.0 and abs(across) < 60):
+        continue  # outside the ruler band (table noise)
+    sta_est = stas[0] + along * (stas[-1] - stas[0]) / L
+    near = min(stas, key=lambda k: abs(k - sta_est))
+    rows.append((near, round(sta_est, 1), round(across, 2), float(s), round(x, 2), round(y, 2)))
+
+with open(OUT, "w", newline="", encoding="utf-8") as fh:
+    w = csv.writer(fh)
+    w.writerow(["station_anchor", "est_station", "across_m", "value", "x", "y"])
+    w.writerows(sorted(rows))
+per = {}
+for near, est, acr, val, _, _ in rows:
+    per.setdefault(near, []).append((acr, val))
+for k in sorted(per):
+    print(f"STA {k}: " + "  ".join(f"[{a:+.1f}m {val:.3f}]" for a, val in sorted(per[k])))