Stephan, Build from your pointer (already) by someone else:
https://github.com/kybernetikos/SolarPosition -----Original Message----- From: Stephen Woodbridge [mailto:wood...@swoodbridge.com] Sent: Monday, March 03, 2014 11:45 AM To: Basques, Bob (CI-StPaul); mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] Color temperature control (night-time viewing of maps) Bob, Checkout this page: http://williams.best.vwh.net/sunrise_sunset_algorithm.htm -Steve On 3/3/2014 11:55 AM, Basques, Bob (CI-StPaul) wrote: > Hi Stephen, > > Yes, that looks like the correct route for this, time/location settings, at > least to make something work globally. The display is for a mapping > interface that will most likely be location aware. I've found a couple of > references to some LIBs for finding terminator, and I think a temperature > curve could be defined based on optimum settings from day/dusk/night views to > make the map readable for all (natural) lighting conditions. At least that's > a place to start. > > Bobb > > > -----Original Message----- > From: mapserver-users-boun...@lists.osgeo.org > [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Stephen > Woodbridge > Sent: Monday, March 03, 2014 10:46 AM > To: mapserver-users@lists.osgeo.org > Subject: Re: [mapserver-users] Color temperature control (night-time > viewing of maps) > > 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 > > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users