Error analysis method	Level of measurement	Applicable spatial object	Spatial object evaluated	Graphic mode

Consistency check	nominal	point, line, area	point, line, area	composite
Ground control check	real	point, pixel, set of pixels	point, pixel, set of pixels	composite
Adjustment computation	real	point	point	composite
Cross validation	real	point surface	point surface	composite side by side
Fuzzy classification	real	pixel	pixel	small multiple animation
Simulation	nominal- real	surface	surface	small multiple, animation

Table 2 Basis for associating error analysis output with graphic display modes.