From 94898aca13cab8a160b37d3f6620fa0c1b18f683 Mon Sep 17 00:00:00 2001
From: Matthieu Bessat <mail@matthieubessat.fr>
Date: Wed, 29 May 2024 15:04:49 +0200
Subject: [PATCH] feat: coordinates bound computation to geo tiles

---
 .../plot_osm_map_with_coordinates.py          | 72 +++++++++++++++++++
 ...sm_map.py => plot_osm_map_with_tile_nb.py} |  2 +
 2 files changed, 74 insertions(+)
 create mode 100644 geo_tiles_assembler/plot_osm_map_with_coordinates.py
 rename geo_tiles_assembler/{plot_osm_map.py => plot_osm_map_with_tile_nb.py} (97%)

diff --git a/geo_tiles_assembler/plot_osm_map_with_coordinates.py b/geo_tiles_assembler/plot_osm_map_with_coordinates.py
new file mode 100644
index 0000000..62e5cd3
--- /dev/null
+++ b/geo_tiles_assembler/plot_osm_map_with_coordinates.py
@@ -0,0 +1,72 @@
+import matplotlib.pyplot as plt
+import matplotlib.image as img
+import requests
+import numpy as np
+import os
+import math
+
+def deg2num(lat_deg, lon_deg, zoom):
+    lat_rad = math.radians(lat_deg)
+    n = 1 << zoom
+    xtile = int((lon_deg + 180.0) / 360.0 * n)
+    ytile = int((1.0 - math.asinh(math.tan(lat_rad)) / math.pi) / 2.0 * n)
+    return xtile, ytile
+
+BOUNDS = ((49.17, 1.31), (49.18, 1.35))
+
+DEFAULT_HEADERS = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; rv:127.0) Gecko/20100101 Firefox/127.0"}
+
+iz = 0
+for z in range(16, 17):
+    # https://tile.openstreetmap.org/11/1029/700.png
+    # 1029, 1030 going to the est, increasing the longitude angle (x)
+    # 700, 701, going to the south, deacreasing the flatitude latitude angle (y)
+
+    TILES_BOUNDS = (
+        deg2num(BOUNDS[0][0], BOUNDS[0][1], z),
+        deg2num(BOUNDS[1][0], BOUNDS[1][1], z)
+    )
+    print(TILES_BOUNDS)
+
+    fig, ax = plt.subplots()
+
+    maxx = 0
+    maxy = 0
+    xrange = range(TILES_BOUNDS[0][0], TILES_BOUNDS[1][0])
+    yrange = range(TILES_BOUNDS[1][1], TILES_BOUNDS[0][1])
+    print(xrange, yrange)
+
+    iy = 0
+    for y in reversed(yrange):
+        ix = 0
+        for x in xrange:
+            # https://tile.openstreetmap.org/17/65956/44733.png
+            url = f"https://tile.openstreetmap.org/{z}/{x}/{y}.png"
+            dir_path = f'tiles/{z}/{x}'
+            tile_path = dir_path + f'/{y}.png'
+            img_data = 0
+            print(tile_path)
+            if not os.path.exists(tile_path):
+                res = requests.get(url, headers=DEFAULT_HEADERS)
+                print(res)
+                if res.status_code != 200:
+                    print(res.content)
+                    exit()
+                img_data = res.content
+                os.makedirs(dir_path, exist_ok=True)
+                with open(tile_path, 'wb') as handler:
+                    handler.write(img_data)
+            im = img.imread(tile_path)
+            print("read")
+            print(ix, iy)
+            ax.imshow(im, aspect='auto', extent=(ix, ix+1, iy, iy+1), zorder=-1)
+            print("imshow")
+            ix += 1
+        iy += 1
+    ax.set_xlim(0, len(xrange))
+    ax.set_ylim(0, len(yrange))
+    ax.set_aspect('equal', adjustable='box')
+    plt.show()
+    break
+    iz += 1
+
diff --git a/geo_tiles_assembler/plot_osm_map.py b/geo_tiles_assembler/plot_osm_map_with_tile_nb.py
similarity index 97%
rename from geo_tiles_assembler/plot_osm_map.py
rename to geo_tiles_assembler/plot_osm_map_with_tile_nb.py
index f46b95f..66449fe 100644
--- a/geo_tiles_assembler/plot_osm_map.py
+++ b/geo_tiles_assembler/plot_osm_map_with_tile_nb.py
@@ -6,6 +6,8 @@ import os
 
 DEFAULT_HEADERS = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; rv:127.0) Gecko/20100101 Firefox/127.0"}
 
+BOUNDS = ((49, 1.1), (49.3, 1.4))
+
 fig, ax = plt.subplots()
 
 maxx = 0