there's compression artifacts in and around the "TEST" watermarks, so this photo doesn't show the original quality. was this image "save for web" or "save as". in photoshop, use the latter "save as" for best quality jpg. if you use "save for web" you basically compress and severely reduce the quality of the image which is not what you want.
as for a test image, it's ok to crop a part of the image so it's small enough to post. **please don't reduce the image size**, i.e., "image size" in photoshop, instead, use the crop tool and crop the image to what you want to show. i suggest 1/3 from the left (i guess showing the weather vanes), top to bottom; add your watermarks, and "save as".
for your in camera settings, what file formats did you shoot this image with, raw, L jpg, M jpg?
JPEG: L(36M:7360x4912), M(22M:5760x3840), S(12M:4224x2816), XS(2M:1920x1280)
RAW: (36M:7360x4912)