fixed wrong geographic coordinate order for gnomonic projection

Author: claxn

docs/guides/grid.ipynb

@@ -426,7 +426,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.12"
+   "version": "3.12.3"
   }
  },
  "nbformat": 4,

docs/guides/tiling_system.ipynb

@@ -310,6 +310,16 @@
     "list(rpts.get_tiles_in_geog_bbox((16, 48, 18, 50), tiling_id=\"my_fine_tiling\"))"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "a52c2501",
+   "metadata": {},
+   "source": [
+    ":::{important}\n",
+    "For a geographical bounding box the order of longitude coordinates is important. As an example: `(-170, 20, 150, 30)` is a large bounding box going from -170° west to 150° east and `(150, 20, -170, 30)` is a small bounding box crossing the antimeridian.\n",
+    ":::"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "2decb0fd",
@@ -356,6 +366,18 @@
     "list(rpts.get_tiles_in_geom(ggeom, tiling_id=\"my_fine_tiling\"))"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "08164a91",
+   "metadata": {},
+   "source": [
+    ":::{note}\n",
+    "All geometries passed to `pytileproj` functions and class methods are segmentised to ensure an adequate representation of the geometry in a different projection system. A maximum segment length is defined as\n",
+    "- 0.1 degree for geographic projections\n",
+    "- 10 kilometres for metric projections\n",
+    ":::"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "107c4c3c",

src/pytileproj/projgeom.py

@@ -215,7 +215,7 @@ def pyproj_to_cartopy_crs(crs: pyproj.CRS) -> "ccrs.CRS":
             false_northing,
             standard_parallels,
         ),
-        "gnom": ccrs.Gnomonic(central_longitude, central_latitude),
+        "gnom": ccrs.Gnomonic(central_latitude, central_longitude),
         "laea": ccrs.LambertAzimuthalEqualArea(
             central_longitude, central_latitude, false_easting, false_northing
         ),