add transform and crs for tiff outputs (#1238)

Author: vincentsarago

CHANGES.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 * add `grayscale` and `bitonal` algorithms
+* add `transform` and `crs` for `tiff` outputs
 
 ## 0.24.0 (2025-09-23)
 

src/titiler/core/tests/test_factories.py

@@ -2126,13 +2126,26 @@ def test_ogc_maps_cog():
         assert "Content-Bbox" in headers
         assert "Content-Crs" in headers
         assert headers["content-type"] == "image/jpeg"
+        meta = parse_img(response.content)
+        assert not meta["crs"]
+
+        response = client.get("/map", params={"url": cog_path, "f": "tif"})
+        assert response.status_code == 200
+        headers = response.headers
+        assert "Content-Bbox" in headers
+        assert "Content-Crs" in headers
+        assert headers["content-type"] == "image/tiff; application=geotiff"
+        meta = parse_img(response.content)
+        assert meta["crs"]
 
         response = client.get("/map", params={"url": cog_path, "f": "tiff"})
         assert response.status_code == 200
         headers = response.headers
         assert "Content-Bbox" in headers
         assert "Content-Crs" in headers
         assert headers["content-type"] == "image/tiff; application=geotiff"
+        meta = parse_img(response.content)
+        assert meta["crs"]
 
         # Conformance Class “Scaling”
         # /req/scaling/width-definition

src/titiler/core/titiler/core/utils.py

@@ -108,7 +108,7 @@ def render_image(  # noqa: C901
         data = rescale_array(data, mask, in_range=datatype_range)
 
     creation_options = {**kwargs, **output_format.profile}
-    if output_format == ImageType.tif:
+    if output_format.driver == "GTiff":
         if "transform" not in creation_options:
             creation_options.update({"transform": image.transform})
         if "crs" not in creation_options and image.crs: