My guess is that they use a counter for each 'grid' or pixel point on the site and count how long the user is near it. One other option would be to use an out of the box image generation script and then import the image into Flex using a swfloader or image mxml construct. It'd keep the logic out of the application, and make it easier to maintain.
Some server side options: http://search.cpan.org/~allenday/SVG-Graph/Graph.pm#DESCRIPTION http://www.labsmedia.com/clickheat/heatmap.html And a full tutorial: http://blog.corunet.com/english/the-definitive-heatmap Good luck, and let us know if you get it working! -- William --- In [email protected], "Nate Pearson" <[EMAIL PROTECTED]> wrote: > > That makes sense :). How would I get those cool color blending > effects in the examples above? If I were to do it now I would just > draw a red circle or square if the threshold were between 15 and 20... > > Here's something that's pretty close to what I want to do. > http://universalmind.com/demo/launchpad.cfm > > At 4:19 in the video they switch to a heat map view. Before that they > just lay down little circles, which I can do. > > Maybe when they switch to the heat map view they just take their > circles and add a lot of glow and blur to them and up the opacity to > the outer colors (blue and green)...what do you guys think? > > --- In [email protected], "Abyss Knight" <briggins@> wrote: > > > > It's been a very long time since I've worked with this sort of thing, > > but I would imagine you would first generate a histogram of all the > > possible concentrations and then map that into the color set you want > > to show (just putting everything into colored buckets). That way with > > any data set the variations are shown in different colors. Now, if you > > wanted to do simple thresholding (i.e. 15 < x < 20 is red) you could > > just iterate over the grid cells or whatever the division is. > > > > I hope that helps. I may be completely misunderstanding you or making > > absolutely no sense. If so, please forgive me. :) > > > > -- William > > > > > > --- In [email protected], "Nate Pearson" <napearson99@> wrote: > > > > > > I'm good at extending UIComponent and making custom things...I just > > > want to know conceptually how people would do it. Even if you've done > > > this in a different language that's fine. I think both of you are > > > thinking more about a grid than a map. > > > > > > I think I explained it poorly. > > > > > > Here's a pic of what I'm looking for. In this one it shows web page, > > > but I would just overlay the same thing over a map. > > > > > > <img > > > > src="http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/> > > > > > > > > > --- In [email protected], Jehanzeb Musani <jehanzeb_bs@> > > > wrote: > > > > > > > > Hello, > > > > > > > > I am not dead sure how one can do it in Flex as I am > > > > relative a newbie in Flex application development. > > > > However, I am working for a financial solutions > > > > provider in Dubai and we have designed heatmap > > > > component in .NET. We used custom rendering (GDI+) to > > > > draw this control in .NET. > > > > > > > > I believe you can do the same in Flex. If you are > > > > familiar with Flash or even if you know Flex Drawing > > > > API, you can opt custom rendering tu built this > > > > control. In my opinion, it will be better than > > > > implementing this functionality using datagrid. > > > > > > > > Hope this helps. > > > > > > > > Regards, > > > > Jehanzeb > > > > > > > > --- Nate Pearson <napearson99@> wrote: > > > > > > > > > I'm thinking about making a heat map overlay. I'm > > > > > not sure how to go > > > > > about it though. Does anyone have any ideas? > > > > > > > > > > Lets say you have a grid, the more points you have > > > > > in one place the > > > > > more red it is in that place, less would be yellow, > > > > > then green, then blue. > > > > > > > > > > I don't know how I would code this though.... > > > > > > > > > > Any help is appreciated. > > > > > > > > > > > > > > > > > > > > > > __________________________________________________ > > > > Do You Yahoo!? > > > > Tired of spam? Yahoo! Mail has the best spam protection around > > > > http://mail.yahoo.com > > > > > > > > > >
![http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/](http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/){kind=link}