set fastapi limit to >=0.111.0 (#944)

* set fastapi limit to >=0.111.0

* fix numpy overflow

Author: vincentsarago

CHANGES.md

@@ -1,5 +1,9 @@
 # Release Notes
 
+## 0.18.5 (2024-07-03)
+
+* Set version requirement for FastAPI to `>=0.111.0`
+
 ## 0.18.4 (2024-06-26)
 
 * fix Tiles URL encoding for WMTSCapabilities XML document

src/titiler/core/pyproject.toml

@@ -31,7 +31,7 @@ classifiers = [
 ]
 dynamic = ["version"]
 dependencies = [
-    "fastapi-slim",
+    "fastapi-slim>=0.111.0",
     "geojson-pydantic>=1.0,<2.0",
     "jinja2>=2.11.2,<4.0.0",
     "numpy",

src/titiler/core/titiler/core/algorithm/dem.py

@@ -81,7 +81,7 @@ class Contours(BaseAlgorithm):
 
     def __call__(self, img: ImageData) -> ImageData:
         """Add contours."""
-        data = img.data
+        data = img.data.astype("float64")
 
         # Apply rescaling for minz,maxz to 1->255 and apply Terrain colormap
         arr = linear_rescale(data, (self.minz, self.maxz), (1, 255)).astype(