From e1feb4156fc318cad0aea27eef7b3d4fc846937c Mon Sep 17 00:00:00 2001
From: Taylor Denouden <taylor.denouden@hakai.org>
Date: Fri, 31 Jan 2025 14:39:18 -0800
Subject: [PATCH] Add output min and max metadata to slope algorithm (#1089)

* Add output min and max metadata to slope algorithm

* Update changelog
---
 CHANGES.md                                     | 6 ++++++
 src/titiler/core/titiler/core/algorithm/dem.py | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/CHANGES.md b/CHANGES.md
index 79e0e9ad9..335f0337a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Release Notes
 
+## Unreleased
+
+### titiler.core
+
+* add `output_min` and `output_max` metadata attributes to `slope` algorithm (@tayden, https://github.com/developmentseed/titiler/pull/1089)
+
 ## 0.21.1 (2025-01-29)
 
 ### titiler.core
diff --git a/src/titiler/core/titiler/core/algorithm/dem.py b/src/titiler/core/titiler/core/algorithm/dem.py
index f85a927a1..8c5a2ed2c 100644
--- a/src/titiler/core/titiler/core/algorithm/dem.py
+++ b/src/titiler/core/titiler/core/algorithm/dem.py
@@ -76,6 +76,8 @@ class Slope(BaseAlgorithm):
     input_nbands: int = 1
     output_nbands: int = 1
     output_dtype: str = "float32"
+    output_min: float = 0
+    output_max: float = 90
 
     def __call__(self, img: ImageData) -> ImageData:
         """Calculate degrees slope from DEM dataset."""