From 89ade8168f594d40b62e8e3ef76073febe20c7bd Mon Sep 17 00:00:00 2001
From: Matthieu Bessat <mail@matthieubessat.fr>
Date: Wed, 29 May 2024 12:48:36 +0200
Subject: [PATCH] feat: geo tiles assembler with python and matplotlib

---
 geo_tiles_assembler/.gitignore      |  1 +
 geo_tiles_assembler/plot_osm_map.py | 54 +++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 geo_tiles_assembler/.gitignore
 create mode 100644 geo_tiles_assembler/plot_osm_map.py

diff --git a/geo_tiles_assembler/.gitignore b/geo_tiles_assembler/.gitignore
new file mode 100644
index 0000000..70b8406
--- /dev/null
+++ b/geo_tiles_assembler/.gitignore
@@ -0,0 +1 @@
+tiles
diff --git a/geo_tiles_assembler/plot_osm_map.py b/geo_tiles_assembler/plot_osm_map.py
new file mode 100644
index 0000000..f46b95f
--- /dev/null
+++ b/geo_tiles_assembler/plot_osm_map.py
@@ -0,0 +1,54 @@
+import matplotlib.pyplot as plt
+import matplotlib.image as img
+import requests
+import numpy as np
+import os
+
+DEFAULT_HEADERS = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; rv:127.0) Gecko/20100101 Firefox/127.0"}
+
+fig, ax = plt.subplots()
+
+maxx = 0
+maxy = 0
+iz = 0
+yrange = range(700, 704)
+xrange = range(1029, 1034)
+
+for z in range(11, 12):
+    # 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)
+    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
+    iz += 1
+
+ax.set_xlim(0, len(xrange))
+ax.set_ylim(0, len(yrange))
+ax.set_aspect('equal', adjustable='box')
+
+plt.show()