Felix Hartmann schrieb:
> On 27.05.2010 13:12, Johann Gail wrote:
>
>>> Setting the fourth via gmaptool breaks the routing for routable maps
>>> even though it should be there for setting maps tranparent/opaque is
>>> some obscure way different from the general transparent/opaque flag
>>>
>>>
>> Could this be the exactly the NOD flag?
>> If modifying this flag breaks routing then this IS a strong hint for
>> influencing routing. Could it be that in this byte one bit is the flag
>> for the presence (or absence) of the NOD table? If this bit is
>> set/cleared then it tells the device that there is no NOD table and
>> therefore no routing is possible.
>>
>>
>>
> Well I don't know how to clear it. Setting it to 0 doesn't help. It
> seems to only matter whether it is even or uneven.
This is exactly what I meant by clearing the bit. With uneven values it
is not set, i.e. cleared.
> Setting it even
> breaks routing, while all uneven values work. Therefore I'm more or less
> sure, this is not the NOD flag.
>
Could you tell please, what happens with broken routing? Does it mean,
there is no routing at all, or happens wrong routing?
> Also this byte is set for non routable garmin maps to even and uneven
> values, so no, I don't think this has anything to do with it.
>
>
This is the point which confuses me at the moment. This bit does
influence routing in some way. But you say that there are nonroutable
maps with this bit set/unset. So what could the meaning of this bit be?
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