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[mkgmap-dev] Putting the DP code under the microscope (simplifyWays patch V8)

From Thilo Hannemann thannema at gmx.de on Wed Aug 12 19:01:45 BST 2009

I'm currently working on it. Have you tried the patch together with  
routing? In my trials the routing was completely broken after applying  
the patch. That is because the merging is done *after* all the routing  
info is generated. So if two ways are merged into one, the references  
in the routing part of the map point nowhere. Also the turn  
restrictions break, because they also refer to the unmerged ways. I'm  
trying to apply the merging *before* the routing info and the turn  
restrictions are generated, but up to now I run into all kinds of  
trouble doing that. I hope I get it working soon, but if you like to  
work on it as well I can post my current diffs.


Am 12.08.2009 um 17:10 schrieb Clinton Gladstone:

> On Sat, Jul 25, 2009 at 3:55 PM, Johann Gail<johann.gail at gmx.de>  
> wrote:
>> Find attached an patch of my working copy. It is based mainly on my  
>> old
>> simplifyWays patch. Its diffed against the current R1102.
>> The main idea is to merge the lines directly before input them to the
>> filters.
>> It improves drawing speed on my etrex considerably on very low  
>> zooms. I'm
>> not sure, if it is the optimal place to do the merging, but it  
>> seems to
>> work.
> I tested this patch, and it seems to work well. I have not yet
> thoroughly tested it, and I have not done a speed comparison, but I
> think the patch is quite worthwhile. Are you considering further work
> on it, or getting it committed?
> Cheers and Thanks.
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