[Openstreetmap] Re: [Openstreetmap-dev] openstreetmap roadmap?

[Ehud Shabtai]

Ben Gimpert wrote:

>Hi Ehud,
>
>I'm not sure about the extent of the mathematical gritty-ness of your
>merging problem -- but be sure to take a look at the merge* methods in
>".../utils/tiger_import/tiger/geometry.rb" that I wrote for cleaning up
>the TIGER data. Note that it takes a two "chains" of line segments and
>returns a single chain if applicable.
>
>	Ben
>  
>
Thanks Ben, where can I find the code, is it in svn?

Ehud.

>
>On Mon, Jul 25, 2005 at 11:57:43PM +0300, Ehud Shabtai wrote:
>  
>
>>Frank Mohr wrote:
>>
>>    
>>
>>>Ehud Shabtai wrote:
>>>
>>>
>>>      
>>>
>>>>On 7/25/05, Tom Carden <tom at tom-carden.co.uk> wrote:
>>>>  
>>>>
>>>>        
>>>>
>>>>>>The approach I'm thinking of is having a server which will receive GPS
>>>>>>tracks,
>>>>>>transfer them to road segments and nodes and merge with current map
>>>>>>      
>>>>>>
>>>>>>            
>>>>>>
>>>>>Automatically?  How?
>>>>>    
>>>>>
>>>>>          
>>>>>
>>>>Take the GPS traces, split them to segments (by detecting turns,
>>>>detecting intersection, etc') and add them as road segments to the
>>>>database. If the database already contains a segment near the one we
>>>>want to add, do some merging.
>>>>  
>>>>
>>>>        
>>>>
>>>just this "do some merging" is the problem
>>>
>>>i tried several approaches to join 2 track segments, but each
>>>failed in some cases
>>>
>>>
>>>      
>>>
>>I don't expect to find a perfect solution. It should produce good 
>>results and allow users to correct incorrect merges through an applet.
>>
>>As I plan to write this utility would you care to discuss the approaches 
>>you tried for doing the merges?
>>
>>Ehud.
>>
>>    
>>
>>>frank
>>>      
>>>
>
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>  
>