Timeline for How to cluster points of interest by lat lon for my WP7 app?
Current License: CC BY-SA 2.5
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 13, 2017 at 12:33 | history | edited | CommunityBot |
replaced http://gis.stackexchange.com/ with https://gis.stackexchange.com/
|
|
| Aug 7, 2011 at 5:41 | comment | added | Sasho | Steve, I am also interested in iOS clustering and had the same issues. Did you make any progress on this one? Can you post some example code/classes? Thank you. | |
| Mar 31, 2011 at 23:36 | comment | added | Mark | that would be fantastic, I will also have a go, I have read over the theory a few times now and am getting understanding a lot better. But if you do happen to have some spare time to throw something together, that would be greatly appreciated | |
| Mar 31, 2011 at 15:15 | comment | added | Steve | I don't have anything to copy and paste but I'll try and throw something together later today. As a comment on the other suggestion, it is not server side. If you have a graphics layer that you are using in WP7 to display your points, you should be able to add the clusterer to the layer and have it do this automatically. The "Extending the GraphicsClusterer" section has a decent example on how to subclass it for custom appearance. | |
| Mar 31, 2011 at 3:22 | comment | added | Mark | do you have any examples of this type of implementation? Even if it is for iOS, I have done iPhone apps before | |
| Mar 31, 2011 at 0:25 | comment | added | Steve | I agree with whuber. I had the same high performance needs, in my case pulling ~15000 points from ArcGIS server and then clustering in iOS (and in javascript for a web implementation). | |
| Mar 30, 2011 at 4:33 | comment | added | whuber | This type of algorithm is computationally efficient: all it takes to identify a point's cluster is to to shift, rescale, and round each coordinate. For 1500 points, then, we're talking about tens of microseconds, maybe a few milliseconds in interpreted environments on slow CPUs. | |
| Mar 30, 2011 at 4:22 | comment | added | Mark | thanks, sounds like a good theory im just worried about performance as all my content is local, no server side data | |
| Mar 30, 2011 at 3:21 | history | answered | Steve | CC BY-SA 2.5 |