search

tanweijiu / osmbonuspack

Automatically exported from code.google.com/p/osmbonuspack
0 stars 0 forks source link

I've done clustering algorithm based on Density-based spatial clustering of applications with noise (DBSCAN) for markers. #94

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Can I do pull request?

Original issue reported on code.google.com by sidorovroman92@gmail.com on 15 Nov 2014 at 8:44

GoogleCodeExporter commented 9 years ago 
Yes!

Original comment by mathieu....@gmail.com on 16 Nov 2014 at 3:48

GoogleCodeExporter commented 9 years ago 
How can I do it?

Original comment by sidorovroman92@gmail.com on 16 Nov 2014 at 8:41

GoogleCodeExporter commented 9 years ago 
You can attach your file(s) to this issue. 
And explain a little bit, if needed.

Original comment by mathieu....@gmail.com on 17 Nov 2014 at 8:37

GoogleCodeExporter commented 9 years ago 
DBSCAN is not what we need. I've converted it into a  more simple and fast 
algorithm. I also added max zoom level for clustering, because when we use big 
zoom levels we need only markers.

algorithm:
create a cluster using the first point from the cloned list. All points that 
are found within the ε-neighbourhood are added to this cluster. Then all the 
neighbours and the main point are removed from the list of points. It continues 
until the list is empty.

If override method buildClusterMarker you can get something as it is presented 
in the attached image.

Original comment by sidorovroman92@gmail.com on 24 Nov 2014 at 3:32

Attachments:

GoogleCodeExporter commented 9 years ago

Original comment by sidorovroman92@gmail.com on 24 Nov 2014 at 3:34

Attachments:

GoogleCodeExporter commented 9 years ago 
This seems really good. Its clustering is much more stable that with my Grid 
mechanism. 
And the max zoom level is a simple solution to the issue about very close 
markers. 

I'm going to test and stress it a little bit more, but it seems a good 
candidate for an inclusion in the lib.

Original comment by mathieu....@gmail.com on 24 Nov 2014 at 10:53

GoogleCodeExporter commented 9 years ago 
Commited in the source code. 

With some slight changes - mainly in the method to handle 
mMaxClusteringZoomLevel. 

Will be part of the next release, proposed as a replacement of 
GridMarkerClusterer.java, which is deprecated.

Original comment by mathieu....@gmail.com on 17 Dec 2014 at 6:09

GoogleCodeExporter commented 9 years ago 
v5.1 now published with this enhancement. 
Closing.

Original comment by mathieu....@gmail.com on 19 Jan 2015 at 10:13