Interesting composition. I like it.
It looked a bit soft so I checked the exif:
Date Time Original 2016:05:01 13:06:04
Exposure Time 1/40
F Number f / 20
Exposure Program Aperture priority
ISO Speed Ratings 64
Metering Mode Pattern
Flash Flash did not fire, compulsory flash mode
Focal Length 70mm
White Balance Auto white balance
Make NIKON CORPORATION
Model NIKON D810
LensInfo 240/10 700/10 28/10 28/10
LensModel 24.0-70.0 mm f/2.8
Lens 24.0-70.0 mm f/2.8
Not sure what you were going for, but these settings aren't helping you as far a sharpness is concerned.
I can only think you were trying to go for a long exposure in midday light without a ND filter.
I think you need to clean your sensor too.
I realize I'm being nit picky, but it would drive me nuts so ...
At the very least I would clone out the dirt spots.