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| | #!/usr/bin/env python3
| | """Fix map images for Glidr question files: t30_q43, t30_q44, t30_q88, t60_q99."""
| |
| | import urllib.request
| | import urllib.error
| | import os
| | from PIL import Image, ImageDraw, ImageFont
| | import math
| | import io
| |
| | BASE = "/Users/i052341/Daten/Cloud/04 - Ablage/Ablage 2020 - 2029/Ablage 2025/Hobbies 2025/Segelflug/Theorie/Glidr"
| | FIGURES_DIRS = [
| | os.path.join(BASE, "SPL Exam Questions FR", "figures"),
| | os.path.join(BASE, "SPL Exam Questions EN", "figures"),
| | os.path.join(BASE, "SPL Exam Questions DE", "figures"),
| | ]
| |
| | WMS_TEMPLATE = (
| | "https://wms.geo.admin.ch/?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap"
| | "&LAYERS=ch.bazl.luftfahrtkarten-icao&CRS=EPSG:4326"
| | "&BBOX={lat_min},{lon_min},{lat_max},{lon_max}"
| | "&WIDTH=1200&HEIGHT=900&FORMAT=image/png"
| | )
| |
| | IMG_W = 1200
| | IMG_H = 900
| |
| |
| | def fetch_wms(lat_min, lon_min, lat_max, lon_max):
| | url = WMS_TEMPLATE.format(lat_min=lat_min, lon_min=lon_min, lat_max=lat_max, lon_max=lon_max)
| | print(f" Fetching WMS: {url[:100]}...")
| | req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
| | with urllib.request.urlopen(req, timeout=60) as resp:
| | data = resp.read()
| | img = Image.open(io.BytesIO(data)).convert("RGBA")
| | return img
| |
| |
| | def ll_to_px(lat, lon, lat_min, lon_min, lat_max, lon_max):
| | px = (lon - lon_min) / (lon_max - lon_min) * IMG_W
| | py = (1 - (lat - lat_min) / (lat_max - lat_min)) * IMG_H
| | return (px, py)
| |
| |
| | def draw_circle(draw, cx, cy, r=40, width=4, color="red"):
| | draw.ellipse([cx - r, cy - r, cx + r, cy + r], outline=color, width=width)
| |
| |
| | def draw_scale_bar(draw, img, lat_min, lon_min, lat_max, lon_max, scale_km, label_km, pos_x=60, pos_y=None):
| | """Draw a scale bar at bottom-left."""
| | if pos_y is None:
| | pos_y = IMG_H - 50
| |
| | # Compute pixels per km at the center latitude
| | center_lat = (lat_min + lat_max) / 2
| | lat_span = lat_max - lat_min
| | lon_span = lon_max - lon_min
| | # 1 degree lat ~ 111.32 km
| | km_per_px_lat = (lat_span * 111.32) / IMG_H
| | km_per_px_lon = (lon_span * 111.32 * math.cos(math.radians(center_lat))) / IMG_W
| | km_per_px = (km_per_px_lat + km_per_px_lon) / 2
| |
| | bar_px = int(scale_km / km_per_px)
| | half = bar_px // 2
| |
| | x0, x1 = pos_x, pos_x + bar_px
| | y0, y1 = pos_y, pos_y + 14
| |
| | # White background rectangle
| | draw.rectangle([x0 - 4, y0 - 4, x1 + 4, y1 + 18], fill="white", outline="black", width=1)
| | # Left half black, right half white with black border
| | draw.rectangle([x0, y0, x0 + half, y1], fill="black", outline="black", width=1)
| | draw.rectangle([x0 + half, y0, x1, y1], fill="white", outline="black", width=1)
| |
| | # Label
| | try:
| | font = ImageFont.truetype("/System/Library/Fonts/Helvetica.ttc", 14)
| | except Exception:
| | font = ImageFont.load_default()
| | draw.text((x0, y1 + 2), f"0", fill="black", font=font)
| | draw.text((x0 + half - 8, y1 + 2), f"{label_km // 2}", fill="black", font=font)
| | draw.text((x1 - 4, y1 + 2), f"{label_km} km", fill="black", font=font)
| |
| |
| | def save_to_all(img, filename):
| | for d in FIGURES_DIRS:
| | out = os.path.join(d, filename)
| | img.save(out, "PNG")
| | print(f" Saved: {out}")
| |
| |
| | # ---------------------------------------------------------------------------
| | # ISSUE 1: t30_q43 — Birrfeld, wider bbox
| | # ---------------------------------------------------------------------------
| | def fix_q43():
| | print("\n=== t30_q43: Birrfeld airspace ===")
| | lat_min, lat_max = 47.20, 47.70
| | lon_min, lon_max = 7.902, 8.569
| |
| | img = fetch_wms(lat_min, lon_min, lat_max, lon_max)
| | draw = ImageDraw.Draw(img)
| |
| | # Birrfeld LSZF: 47.4435, 8.2350
| | bx, by = ll_to_px(47.4435, 8.2350, lat_min, lon_min, lat_max, lon_max)
| | draw_circle(draw, bx, by, r=40, width=4, color="red")
| |
| | # Scale bar 5 km
| | draw_scale_bar(draw, img, lat_min, lon_min, lat_max, lon_max,
| | scale_km=5, label_km=5, pos_x=60, pos_y=IMG_H - 60)
| |
| | save_to_all(img, "t30_q43.png")
| |
| |
| | # ---------------------------------------------------------------------------
| | # ISSUE 2: t30_q44 — Schwyz/Morgarten/Hinwil
| | # ---------------------------------------------------------------------------
| | def fix_q44():
| | print("\n=== t30_q44: Schwyz/Morgarten/Hinwil ===")
| | lat_min, lat_max = 46.85, 47.45
| | lon_min, lon_max = 8.32, 9.12
| |
| | img = fetch_wms(lat_min, lon_min, lat_max, lon_max)
| | draw = ImageDraw.Draw(img)
| |
| | points = [
| | ("Schwyz", 47.02, 8.66),
| | ("Morgarten", 47.10, 8.61),
| | ("Hinwil", 47.30, 8.84),
| | ]
| | for name, lat, lon in points:
| | px, py = ll_to_px(lat, lon, lat_min, lon_min, lat_max, lon_max)
| | draw_circle(draw, px, py, r=40, width=4, color="red")
| |
| | # Scale bar 10 km
| | draw_scale_bar(draw, img, lat_min, lon_min, lat_max, lon_max,
| | scale_km=10, label_km=10, pos_x=60, pos_y=IMG_H - 60)
| |
| | save_to_all(img, "t30_q44.png")
| |
| |
| | # ---------------------------------------------------------------------------
| | # ISSUE 4: t30_q88 — Münster VS to Amsteg
| | # ---------------------------------------------------------------------------
| | def fix_q88():
| | print("\n=== t30_q88: Münster VS to Amsteg ===")
| | lat_min, lat_max = 46.40, 46.86
| | lon_min, lon_max = 8.16, 8.78
| |
| | img = fetch_wms(lat_min, lon_min, lat_max, lon_max)
| | draw = ImageDraw.Draw(img)
| |
| | munster_lat, munster_lon = 46.486, 8.265
| | amsteg_lat, amsteg_lon = 46.776, 8.673
| |
| | mx, my = ll_to_px(munster_lat, munster_lon, lat_min, lon_min, lat_max, lon_max)
| | ax, ay = ll_to_px(amsteg_lat, amsteg_lon, lat_min, lon_min, lat_max, lon_max)
| |
| | # Red route line
| | draw.line([(mx, my), (ax, ay)], fill="red", width=4)
| |
| | # Circles at both ends
| | draw_circle(draw, mx, my, r=40, width=4, color="red")
| | draw_circle(draw, ax, ay, r=40, width=4, color="red")
| |
| | # Scale bar 10 km
| | draw_scale_bar(draw, img, lat_min, lon_min, lat_max, lon_max,
| | scale_km=10, label_km=10, pos_x=60, pos_y=IMG_H - 60)
| |
| | save_to_all(img, "t30_q88.png")
| |
| |
| | # ---------------------------------------------------------------------------
| | # ISSUE 5: t60_q99 — Birrfeld-Courtelary-Grenchen route
| | # ---------------------------------------------------------------------------
| | def fix_q99():
| | print("\n=== t60_q99: Birrfeld-Courtelary-Grenchen ===")
| | # lon range needed: 7.07 to 8.23 => span 1.16, but we use 1.4 for margin
| | # lat span = 1.4 / 1.333 = 1.05, center lat 47.31
| | lat_min, lat_max = 46.78, 47.84
| | lon_min, lon_max = 7.00, 8.40
| |
| | img = fetch_wms(lat_min, lon_min, lat_max, lon_max)
| | draw = ImageDraw.Draw(img)
| |
| | birrfeld_lat, birrfeld_lon = 47.44, 8.23
| | courtelary_lat, courtelary_lon = 47.18, 7.07
| | grenchen_lat, grenchen_lon = 47.18, 7.39
| |
| | bx, by = ll_to_px(birrfeld_lat, birrfeld_lon, lat_min, lon_min, lat_max, lon_max)
| | cx, cy = ll_to_px(courtelary_lat, courtelary_lon, lat_min, lon_min, lat_max, lon_max)
| | gx, gy = ll_to_px(grenchen_lat, grenchen_lon, lat_min, lon_min, lat_max, lon_max)
| |
| | # 2-segment red line: Birrfeld -> Courtelary -> Grenchen
| | draw.line([(bx, by), (cx, cy)], fill="red", width=4)
| | draw.line([(cx, cy), (gx, gy)], fill="red", width=4)
| |
| | # Circles at all three
| | draw_circle(draw, bx, by, r=40, width=4, color="red")
| | draw_circle(draw, cx, cy, r=40, width=4, color="red")
| | draw_circle(draw, gx, gy, r=40, width=4, color="red")
| |
| | # Scale bar 15 km
| | draw_scale_bar(draw, img, lat_min, lon_min, lat_max, lon_max,
| | scale_km=15, label_km=15, pos_x=60, pos_y=IMG_H - 60)
| |
| | save_to_all(img, "t60_q99.png")
| |
| |
| | if __name__ == "__main__":
| | fix_q43()
| | fix_q44()
| | fix_q88()
| | fix_q99()
| | print("\nAll maps generated successfully.")
|
|
