[RS-ecology] rasterCVA gives a blank map as output

[Natalia Quinteros]

Hi List,

In chapter 9, when attempting a spectral change vector analysis the
rasterCVA gave as an input a blank map.

changeVec <- rasterCVA(tc2011[[1:2]], tc1988[[1:2]])

Any ideas why?

Thanks,

Natalia
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