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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Norman,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">I would imagine there is a similar blackout event for folks in airplanes (pilots) as well.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Bobb<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Norman Vine [mailto:nhv@cape.com]
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<b>Sent:</b> Monday, March 03, 2014 11:10 AM<br>
<b>To:</b> Basques, Bob (CI-StPaul)<br>
<b>Cc:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> Re: [mapserver-users] Color temperature control (night-time viewing of maps)<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Bob<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">We started with the Standard NOAA chart palette foray then used a gamma<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">function to tone this down for Dawn/Dusk but used a special night time palette<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">based on user feedback note that at sea there is usually a 'blackout environment'<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">which is much darker then most<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Have you seen this project ?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><a href="http://jonls.dk/redshift/">http://jonls.dk/redshift/</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Norman<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On Mar 3, 2014, at 11:49 AM, "Basques, Bob (CI-StPaul)" <<a href="mailto:bob.basques@ci.stpaul.mn.us">bob.basques@ci.stpaul.mn.us</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Hi Norman,</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">I had another thought after I sent the first post. Maybe something along the lines of an inside/outside view switcher. The outside mode would self
correct based on the location/time settings. I’m really interested in this automated approach to making the settings change. I have even worked out how I can make the changes to a mapfile could work from a config file. I just need the actual RGB conversion
routine to try out the idea. Optimum settings for those three values you described would get things started, then I would need to figure out the best approach to apply by location/time, (heck, you could even factor in weather conditions down the line . .
.)</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">bobb</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Norman
Vine [mailto:nhv@<a href="http://cape.com"><span style="color:purple">cape.com</span></a>]<span class="apple-converted-space"> </span><br>
<b>Sent:</b><span class="apple-converted-space"> </span>Monday, March 03, 2014 10:40 AM<br>
<b>To:</b><span class="apple-converted-space"> </span>Basques, Bob (CI-StPaul)<br>
<b>Cc:</b><span class="apple-converted-space"> </span><a href="mailto:mapserver-users@lists.osgeo.org"><span style="color:purple">mapserver-users@lists.osgeo.org</span></a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [mapserver-users] Color temperature control (night-time viewing of maps)</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Bob<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Back in the day when I was working on marine navigation chart displays<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">we used separate color tables for different light conditions<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">we found that 3 tables sufficed, Day, Dusk/Dawn, Night<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">we cheated a bit and used 64 bit palettes this way with a little trickery<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">we could pack everything into a normal 8 bit color table<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">In practice this worked quite well<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">HTH<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Norman<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On Mar 3, 2014, at 11:30 AM, "Basques, Bob (CI-StPaul)" <<a href="mailto:bob.basques@ci.stpaul.mn.us"><span style="color:purple">bob.basques@ci.stpaul.mn.us</span></a>> wrote:<o:p></o:p></p>
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<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">All,</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">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.</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">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 . . .</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">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.</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Maybe there are Browser functions that can be applied to the problem (I haven’t found anything specific there yet though.</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Thanks</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif"">Bobb</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:8.0pt;font-family:"Comic Sans MS","serif""> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:13.5pt;font-family:"Arial","sans-serif"">_______________________________________________<br>
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