[android-developers] Re: MapView Overlay problem

I haven't had to use the Douglas-Peucker algorithm, but I understand
others have so with success.
http://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm
This algorithm will thin out the number of poly lines.
Apparently there's an open source implementation in the Android
MyTracks app, licensed under Apache 2.0.
http://code.google.com/p/mytracks/source/browse/MyTracks/src/com/google/android/apps/mytracks/util/LocationUtils.java
It's in the method decimate().
JP

On Jun 30, 2:46 pm, Felix Garcia Lainez <fgarcialai...@gmail.com>
wrote:
> Hello,
>
> The case is that i want to show a route on a MapView. Something simple
> at first sight, simply i created a class that extends overlay and
> implement draw method. On this method i iterate over an array of
> GeoPoints and using a canvas y connect all points. It works fine more
> or less, but i am having issues when drawing long routes with many
> points. The problem is that application is very slow, and sometimes
> MapActivity is closed simply doing a zoom in or zoom out on the map
> with the route drawn...
>
> My question is how to improve performance on this situation....
>
> Thanks!

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