[GRASSLIST:95] Re: making a "true-color" landsat composite

[Dylan Beaudette]

Markus,

Nice images!

a couple things:

1. the link at the top of the page had some interesting polar plots.
For hard copy I found that ps.rose in the GMT suite produces excellent
results as well:
http://169.237.35.250/~dylan/NPS/day100.png

2. the color boost technique -- is your script available on the GRASS
wiki somewhere, or in the grass scripts dir in a recent CVS branch?

This looks like it will do the trick, now the only problem is that I
have just put together the entire state of Arizona with the poor
looking imagery!

thanks for the tips,

Dylan


On 3/14/06, Markus Neteler <neteler at itc.it> wrote:
> Dylan Beaudette wrote:
>
> >Hi everyone,
> >
> >I was working on constructing some "true color" landsat composite images today
> >from bands 3,2,1 -- and came across some strange inconsistencies. Data from
> >one source produces "nice" true color images:
> >
> >http://casoilresource.lawr.ucdavis.edu/drupal/node/211
> >
> >whereas, another source produces somewhat muddy true color composites. I tried
> >playing a bit with an equalized grey colormap for each band via r.colors
> >color=grey.eq with the following results:
> >
> >http://casoilresource.lawr.ucdavis.edu/drupal/node/215
> >
> >
> >Does anyone have any tips on how to tweak color ramps for the various bands so
> >as to get a better looking "true color" composite?
> >
> >
> how do you like this LANDSAT:
>  http://mpa.itc.it/markus/grass61/demos/
>  -> LANDSAT 7 color boost
> ?
>
> Markus
>