Re: [Navit-users] Navit-0.0.3 crashes when rotating the map, and some first impressions

[Helge H. <hel...@ai...>]

KaZeR wrote:
> Hi Helge, and welcome onboard :)
>
> I had to manually approve your mail. You may want maybe to subscribe to 
> the ML (at your convenience).
>   
I have a subscription, but I post from a different address. I that a 
problem?
Outgoing messages always come from "hel...@ai..."
However, I use qmail to get mailing list messages into a
folder of its own. This requires that the incoming
mail is adressed to "hel...@ai..."
So I subscribed that address. This approach works for
the linux kernel mailing list and the lyx mailing lists.
However, I am open to suggestions for a different setup.

> Helge Hafting a écrit :
>   
>> I downloaded navit-0.0.3 from cvs the 11. Very exiting to see a
>> open navigation program. I also downloaded the free map of the planet.
>>   
>>     
> Nice to hear :)
>   
>> Compiling and installing the gtk version went ok, and
>> so did the first test just looking at the map.
>>   
>>     
> So far, so good!
>   
>> Then I connected a gps and took it for a drive.
>> The program crashed a lot.  After some time I figured
>> out that it crashes whenever I make a turn - navit probably
>> tries to rotate the map and fails somehow.
>>
>> Is this a known problem? Or a bad side effect of using the whole
>> planet map on a machine with 2GB of memory? The machine did not
>> seem to run out of memory though.
>>   
>>     
> This isn't a known problem. It could help us if you could provide a log 
> of your trip.
> Simply start gpsd as usual, and run : gpspipe -r > logfile.nmea, and 
> drive as usual.
> Then give us your nmea file, and we'll be able to replay the log and 
> investigate your problem.
>
> Also, a gdb stack could help :
> install gdb, then run gdb navit
> at the gdb prompt, type 'run'
> when it crashes, type 'where' and give us the whole error report (IRC, 
> mail, bug tracker)
>   
I'll try that, thanks for the advice!

> This can be changed in the layout part of navit.xml
>
>                         <item 
> type="highway_city,highway_land,street_4_city,street_4_land,street_n_lanes" 
> order="10-18">
>                                 <label label_size="8" />
>                         </item>
>
> The item above describe that streets labels will be tagged with a text 
> of 8px when the view is between 10 and 18 (18 means near the ground, 0 
> means the highest view possible).
>   
Thanks, I'll have a look at that.
>
> I agree that it isn't really convenient to do, but config screen in 
> navit will be for later, there is some other tasks with higher priority.
>   
No problem with that. :-)
>   
>>  - Streets have names but nothing else. Perhaps this is just a problem with
>>    the free map? It is useful to see town, district and country names too . . .
>>   
>>     
> Where would you like thoses informations to be displayed?
>   
This would depend on the zoom level. If some
village/town/city/capital/district/lake/island/country is small enough to be
one of several entities on the map, then it is useful to see the name.

I don't know if maps have enough information to do this right.
Do they provide the enclosing border of towns, cities and countries?
If not, consider displaying city names in some zoom levels,
country names in the outermost zoom levels, and so on.

City/country name is not so useful when zoomed down to street level
of course. It is then useful to have names for large buildings and
landmarks instead - if the map provides such data.

River names is nice to have, possibly in dark blue so they
can't be mistaken for street names. Names for the biggest roads
is useful even when zooming out - it lets the user notice
that it is the "E6" that connects Trondheim and Oslo, for example.

> And also, yes, OSM currently gives some limitations about the content.
> In M&G, you can almost always find street -> town -> country, but it's 
> less common currently in OSM.
> But OSM grows very fast :)
>   
Yes, I am planning to add the name for the street where I live. :-)
>> -  The route doesn't always show. Zooming out helps in such cases. Doesn't
>>    navit want to draw the route when the endpoints are outside the view?
>>   
>>     
> You may want to try the "refresh" and "follow" tags for vehicles :
> <vehicle name="Meins" enabled="yes" source="gpsd://localhost" 
> color="#0000ff" follow="1" refresh="1"/>
>
>
> Follow will always center the view on your vehicle.
> Refresh will force a refresh of the map each time you moves.
>   
I'll try.
>> -  Navit shows the whole route although I have driven halfway. 
>>    Omitting the part already travelled, or keeping that in a different
>>    color would make it much easier to quickly find the car on the map.
>>   
>>     
> This is weird. Navit should only show the remaining route, from your 
> current position to your destination.
> Looks like a refresh problem to me. Maybe try the tip above.
>   
Ok. I am not sure it showed all of the route, but it definitely
showed more than just from the car to the destination.
I didn't get to test much with a crash on every turn, there are
few straight roads where I live.

>> *  Zooming out to view all of europe  makes  things real slow. I guess navit
>>    doesn't drop details when zooming out. It'd be nice to see at least
>>    the motorways connecting the large cities in such a view.
>>   
>>     
> It does, but perhaps not enough.
> If you want, you can try to adjust the "order" value of items you want 
> to hide (higher value mean less displayed).
>   
I'll try. Thanks for all the tips!
> Thanks for you interest!
>   
I bought a linux-based gps map, but they are not going to
update the linux version of the software. Guess it didn't sell enough.
They won't even provide map updates that works with their old software.

Navit does the job though, and I can get the reiseplanner maps if
the free map isn't enough.

Helge Hafting