SV: SV: [GRASS-user] Vector map text legend (now more spesific about logarithmic raster legend)

[Moritz Lennert]

On 23/05/11 15:34, Martin Album Ytre-Eide wrote:
> I think Arc&  copycats use class breaks so much in their legends
> simply as a matter of the vector-feature heritage of that software;
> histogram classes make more sense if you start with a number of
> sparse data points. In raster maps (traditionally GRASS's strong
> point) it is more a case of continuous gradations. shrug; just a
> small theory.

Classification of data into a limited number of categories is always 
about reduction of information for ease of interpretation. Yes, you can 
"lie with maps", but at the same time a series of treatments of 
information become much easier with a reduced set of categories (e.g. 
comparison of situation over time and space).

Definitely an interesting debate. But even the author of "How to Lie 
with Maps" does not put into question the use of categories in maps...

Moritz