[mkgmap-dev] [PATCH v5] - min arc length fixes

Sat Aug 29 12:13:36 BST 2009

Can you tell me what setting you had for U-Turns? If this is indeed a 
MapSource < 6.13.7 bug, then knowing this might be important in deciding 
if your patch v5 is necessary.

Garvan

Mark Burton wrote:
> Hi Garvan,
>
>   
>> I spent some time testing short arcs and managed to find some routing 
>> problems where mapsource will route in one direction but not in the 
>> reverse direction. This looks like a mapsource bug to me, so I am 
>> curious if it is seen with all versions of mapsource, or even if others 
>> can reproduce it. I tested with version 6.13.7 of mapsource, and builds 
>> 1143, 1155 and 1155 with the v5 patch of mkgmap.
>>
>> The test map is tiny, so you may have trouble finding it unless you use 
>> the gdb file. Its someplace over Malaysia (N1 19.785 E103 28.403). Note 
>> that the coordinates were very carefully chosen to select the maximum 
>> length arc that demonstrated this problem. The length of the short-arc 
>> shown in gpsmapedit is 5.4 m.
>>     
>
> Using 1155, routing in either direction using the points in
> route_error.gdb, it routed the short direction. When you load
> route_error.gdb into mapsource it does show the route going the long
> way but if i  then ask it to recalculate the route it goes the short
> way. This is for car routing either shortest distance or quickest time.
>
> Mapsource 6.15.6
>
> So, it appears to work Ok for me.
>
> Cheers,
>
> Mark
>  
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>   