On 3/3/2014 11:30 AM, Basques, Bob (CI-StPaul) wrote:
All,
So, I’ve been reading up on nighttime colors for electronic display(s).
I was wondering if anyone has any pointers on information about applying
color temperature corrections to displays for nighttime viewing. I’m in
need of providing this functionality to some night crew workers.
My first thought was to apply some sort of RGB algorithm to the mapfile
color settings. Then I thought maybe a middleware processor routine
(between MapServer and the browser) might be a better approach, or
possibly using something in the browser . . .
I’m only looking at setting up distinct color settings at the moment.
Maybe 3-5 ranges to start with. I do know that some Mac hardware has
some display monitoring for color temperature. I would prefer to do
something that could apply globally however.
Maybe there are Browser functions that can be applied to the problem (I
haven’t found anything specific there yet though.
Bob,
One simple way to deal with this is to have two mapfiles with different
colors setup on them and then you a substitution to switch between the
day and night mapfile.
I wrote some code years ago that detects the day-night night terminator
line in javascript to you can make the change. you need to know the
browser location to compute this accurately. but a simple [day/night]
toggle button would allow the user to switch manually.
-Steve W
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