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From: Ying-Tsao on 26 May 2010 04:38
i load a figure ,get from GoogleEarth
and i want to add some points at this figure

i transfore the pixel data to latitude/longitude,that i can plot the points i need
but when i plot this figure( using pcolor) ,color will be changed.

how can i save this new figure with the GoogleEarth's color?

thanks!
From: us on 26 May 2010 05:39
"Ying-Tsao " <pinewolf(a)xuite.net> wrote in message <htimlc$479$1(a)fred.mathworks.com>...
> i load a figure ,get from GoogleEarth
> and i want to add some points at this figure
>
> i transfore the pixel data to latitude/longitude,that i can plot the points i need
> but when i plot this figure( using pcolor) ,color will be changed.
>
> how can i save this new figure with the GoogleEarth's color?
>
> thanks!

a hint:
- try to retrieve the original color map...
- then, apply the cmap...

us
From: Walter Roberson on 26 May 2010 10:08
Ying-Tsao wrote:
> i load a figure ,get from GoogleEarth
> and i want to add some points at this figure
>
> i transfore the pixel data to latitude/longitude,that i can plot the
> points i need
> but when i plot this figure( using pcolor) ,color will be changed.
> how can i save this new figure with the GoogleEarth's color?

pcolor scales the colors according to the actual range of data unless
you tell it otherwise.

http://www.mathworks.com/access/helpdesk/help/techdoc/ref/pcolor.html

The minimum and maximum elements of C are assigned the first and last
colors in the colormap. Colors for the remaining elements in C are
determined by a linear mapping from value to colormap element.

pcolor(C) draws a pseudocolor plot. The elements of C are linearly
mapped to an index into the current colormap. The mapping from C to the
current colormap is defined by colormap and caxis.
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