Hi, I was able to implement the method. Check it out http://www.bcmetis.ca/manage_display_heatmap.php. It still needs some work, however notice that the markers expand in size as you zoom down levels. I have not dealt with Meridian issues, which I will need to since some of the data is in the Arctic. I am not entirely happy with the colours, however if you've got any suggestions I'd appreciate them
On a smaller note, the page loads but more corny running deer stops from time to time. Would you know why? I also need to add an hourglass between page reloads since the Google Map API seems to be quite busy. Thanks, James On Jan 28, 1:20 am, String <[email protected]> wrote: > Hi James, > > I assume the method we discussed in e-mail of using semitransparent > markers didn't work out? I'd think you could do multicolored that way, > but I haven't tried it. Do you have too many markers for that to be > practical? > > Otherwise, what's wrong with a grid-based approach? If you construct > the grid programmatically, it shouldn't matter how fine it is, and > determining density that way will still be O(n). I've used that > approach for server-side clustering with good success on a number of > projects, and it seems to me it'd be a reasonable approximation. > > A variation would be to use a grid to find "hotspots" - this is > essentially what clustering does - then color each marker by its > proximity to those. It'd require a couple of passes through the data, > but still be O(n). > > String > > On Jan 27, 5:38 pm,jameslove<[email protected]> wrote: > > > Hi, > > I'd like to calculate the rough proximity of markers on the server > > side in order to alter the colour of markers which are clustered. For > > scalability I'm thinking that a rough "as the crow" flies calculation > > would be the most scalable. I can only think of a brute force method > > where I compare each of the markers to all the others. > > > The Clusterer class uses some sort of grid method, however I would > > need to make a small grid in order to achieve the effect I am > > desiring. I've got an approximation of a heat map, but I'd like to see > > if I can make it in more than one colour by overlaying different > > coloured semi-transparent custom icons. > > > Is there another server side method that might be employed? Is there > > anything from the Google API which would calculate the proximity of > > markers? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Maps-API?hl=en -~----------~----~----~----~------~----~------~--~---
