Problem Description
When ArcGIS operation conducted clip WARNING: warning001003: Datum conflict between input and output.
the reason
The problem is that different input range of the coordinate system and clipping. Input coordinates i.e. raster and two layers of different output extent.
solution
Many unified coordinate system, the specific method. Introduction of a here. Right ArcMap intermediate blank area, select Data frame properties, the coordinate system is set to Input coordinate system; Output extent then exported back (right layer, choose Data-export data), and select Data Frame export the same coordinate system, thus obtained new layer Output Extent, and Input Raster on the same coordinate system.
