From e5eff80bf3a4c8897acd0afac9780f6d54af751b Mon Sep 17 00:00:00 2001
From: vincentsarago <vincent.sarago@gmail.com>
Date: Thu, 16 Nov 2023 15:37:01 +0100
Subject: [PATCH] simplify

---
 rio_tiler/utils.py | 28 ++++++++++------------------
 1 file changed, 10 insertions(+), 18 deletions(-)

diff --git a/rio_tiler/utils.py b/rio_tiler/utils.py
index 265cd6e9..31cb7f87 100644
--- a/rio_tiler/utils.py
+++ b/rio_tiler/utils.py
@@ -13,7 +13,6 @@
 from rasterio.dtypes import _gdal_typename
 from rasterio.enums import ColorInterp, MaskFlags, Resampling
 from rasterio.errors import NotGeoreferencedWarning
-from rasterio.features import bounds as featureBounds
 from rasterio.features import is_valid_geom
 from rasterio.io import DatasetReader, DatasetWriter, MemoryFile
 from rasterio.rio.helpers import coords
@@ -223,27 +222,17 @@ def get_overview_level(
     return ovr_idx
 
 
-def bbox_to_feature(west: float, south: float, east: float, north: float) -> Dict:
-    """Create a GeoJSON feature from a bbox."""
-    return {
-        "type": "Polygon",
-        "coordinates": [
-            [[west, south], [west, north], [east, north], [east, south], [west, south]]
-        ],
-    }
-
-
 def _cheap_transform_calculation(src, dst_crs: CRS) -> Affine:
-    center = ((src.bounds[1] + src.bounds[3]) / 2, (src.bounds[0] + src.bounds[2]) / 2)
+    """Get X,Y resolution by transforming the bbox of one pixel at the center of the dataset."""
+    center = ((src.bounds[0] + src.bounds[2]) / 2, (src.bounds[1] + src.bounds[3]) / 2)
     xres, yres = src.res[0] / 2, src.res[1] / 2
-    geom = bbox_to_feature(
+    bbox = (
         center[0] - xres,
         center[1] - yres,
         center[0] + xres,
         center[1] + xres,
     )
-    out = transform_geom(src.crs, dst_crs, geom)
-    bbox = featureBounds(out)
+    bbox = transform_bounds(src.crs, dst_crs, *bbox)
     xres = bbox[2] - bbox[0]
     yres = bbox[3] - bbox[1]
     left, _, _, top = transform_bounds(src.crs, dst_crs, *src.bounds)
@@ -272,10 +261,13 @@ def get_vrt_transform(
 
     """
     if src_dst.crs != dst_crs:
-        # dst_transform, _, _ = calculate_default_transform(
-        #     src_dst.crs, dst_crs, src_dst.width, src_dst.height, *src_dst.bounds
-        # )
+        dst_transform, _, _ = calculate_default_transform(
+            src_dst.crs, dst_crs, src_dst.width, src_dst.height, *src_dst.bounds
+        )
+        print()
+        print(dst_transform.a, dst_transform.e)
         dst_transform = _cheap_transform_calculation(src_dst, dst_crs)
+        print(dst_transform.a, dst_transform.e)
 
     else:
         dst_transform = src_dst.transform