Deprecate open_cog -- read_geotiff handles all sources

read_geotiff already accepts HTTP URLs, cloud URIs (s3://, gs://,
az://), local files, and VRT files. open_cog is now a thin
deprecated wrapper. Users just use read_geotiff for everything:

  read_geotiff('https://example.com/cog.tif')
  read_geotiff('s3://bucket/cog.tif')
  read_geotiff('/local/dem.tif')
  read_geotiff('mosaic.vrt')

All with gpu=, chunks=, window=, band= options.
Removed open_cog from the README feature matrix.

Author: brendancol

README.md

@@ -142,7 +142,6 @@ Native GeoTIFF and Cloud Optimized GeoTIFF reader/writer. No GDAL required.
 | [read_geotiff](xrspatial/geotiff/__init__.py) | Read GeoTIFF / COG / VRT | ✅️ | ✅️ | ✅️ | ✅️ | ✅️ |
 | [write_geotiff](xrspatial/geotiff/__init__.py) | Write DataArray as GeoTIFF / COG | ✅️ | ✅️ | ✅️ | ✅️ | ✅️ |
 | [read_vrt / write_vrt](xrspatial/geotiff/__init__.py) | Virtual Raster Table mosaic | ✅️ | ✅️ | ✅️ | ✅️ | |
-| [open_cog](xrspatial/geotiff/__init__.py) | HTTP range-request COG reader | ✅️ | ✅️ | ✅️ | ✅️ | ✅️ |
 
 `read_geotiff` and `write_geotiff` auto-dispatch to the correct backend:
 

xrspatial/geotiff/__init__.py

@@ -443,32 +443,12 @@ def write_geotiff(data: xr.DataArray | np.ndarray, path: str, *,
     )
 
 
-def open_cog(url: str, *,
-             overview_level: int | None = None,
-             chunks: int | tuple | None = None,
-             gpu: bool = False) -> xr.DataArray:
-    """Read a Cloud Optimized GeoTIFF from an HTTP URL.
-
-    Uses range requests so only the needed tiles are fetched.
-
-    Parameters
-    ----------
-    url : str
-        HTTP(S) URL to the COG.
-    overview_level : int or None
-        Overview level (0 = full resolution).
-    chunks : int, tuple, or None
-        Chunk size for Dask lazy reading.
-    gpu : bool
-        Use GPU-accelerated decompression.
+def open_cog(url: str, **kwargs) -> xr.DataArray:
+    """Deprecated: use ``read_geotiff(url, ...)`` instead.
 
-    Returns
-    -------
-    xr.DataArray
-        NumPy, Dask, CuPy, or Dask+CuPy backed depending on options.
+    read_geotiff handles HTTP URLs, cloud URIs, and local files.
     """
-    return read_geotiff(url, overview_level=overview_level,
-                        chunks=chunks, gpu=gpu)
+    return read_geotiff(url, **kwargs)
 
 
 def read_geotiff_dask(source: str, *, chunks: int | tuple = 512,