Initial commit

test_h06_web_mercator_utils.py

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+import pytest
+import h06_web_mercator_utils as H06
+
+class TestH06WebMercatorUtils:
+    
+    def test_latlon_to_tile(self):
+        # Ukraine typical coords
+        x, y = H06.latlon_to_tile(50.4501, 30.5234, 19)
+        assert x > 0
+        assert y > 0
+        
+    def test_tile_to_latlon(self):
+        x, y, zoom = 305000, 175000, 19
+        lat, lon = H06.tile_to_latlon(x, y, zoom)
+        assert -90 <= lat <= 90
+        assert -180 <= lon <= 180
+        
+    def test_compute_tile_bounds(self):
+        bounds = H06.compute_tile_bounds(305000, 175000, 19)
+        assert "nw" in bounds
+        assert "se" in bounds
+        assert "gsd" in bounds
+        # GSD at zoom 19 in mid-latitudes should be roughly 0.15 to 0.4 m/px
+        assert 0.15 < bounds["gsd"] < 0.4