Some notes on mkgmap Nod version 923
Comment on --help=options -----------------quote ---------- --code-page=''number'' Use the given code page for the . This is --------- end quote ----------- Something is missing here... ^ ^ -----------------quote ---------- --list-styles List the avaialble styles. -----------------end quote ---------- ^^^ Typo Current version doesn't provide icons for bus stops, just dots. There are dots for every road crossing. Haven't checked if they are there because of highway=crossing or just because two ways cross. Can those dots be disabled? They fill up the display on when looking at wider area. http://www.openstreetmap.org/?lat=60.232652&lon=24.958491&zoom=18&layers=B00... has nice round roundabout. Doesn't look round when looked on my etrex hcx. Map created with revision 913 and following route (green -> red): http://www.yournavigation.org/index.php?flat=60.264601&flon=24.875072&tlat=6... Only instruction was to turn left (vanha kaarelan tie). I took the left from the off-ramp. The instruction to turn right to Vaskivuorentie was missing.
Hi,
Map created with revision 913 and following route (green -> red): http://www.yournavigation.org/index.php?flat=60.264601&flon=24.875072&tlat=6... Only instruction was to turn left (vanha kaarelan tie). I took the left from the off-ramp. The instruction to turn right to Vaskivuorentie was missing.
It's probably due to the fact that the way 5231105 joins way 6844890 at such a shallow angle. The garmin direction message generation widget doesn't cope well with shallow angles. Roundabouts have a similar problem (it reports the wrong exit number if the exit way's angle is not to its liking). Don't think there's much we can do about that. It's the data. Cheers, Mark
On Feb 23, 2009, at 19:57, Mark Burton wrote:
Map created with revision 913 and following route (green -> red): http://www.yournavigation.org/index.php?flat=60.264601&flon=24.875072&tlat=6... Only instruction was to turn left (vanha kaarelan tie). I took the left from the off-ramp. The instruction to turn right to Vaskivuorentie was missing.
It's probably due to the fact that the way 5231105 joins way 6844890 at such a shallow angle.
The garmin direction message generation widget doesn't cope well with shallow angles. Roundabouts have a similar problem (it reports the wrong exit number if the exit way's angle is not to its liking).
Don't think there's much we can do about that. It's the data.
We could do something similar to what you've done for roundabouts. I wonder what would happen if instead of changing the geometry, we just lied about the angles in NOD. Another option might be detaching the geometry of the NOD network slightly from the TRE/RGN geometry. I'm not sure if it's legal for a node in NOD to have different coordinates from the corresponding point in TRE/RGN. Cheers Robert
Hi Robert,
Don't think there's much we can do about that. It's the data.
We could do something similar to what you've done for roundabouts.
Well, we could but I think it would be difficult to do "tastefully".
I wonder what would happen if instead of changing the geometry, we just lied about the angles in NOD.
That's a really interesting idea, can you try doing that sometime?
Another option might be detaching the geometry of the NOD network slightly from the TRE/RGN geometry. I'm not sure if it's legal for a node in NOD to have different coordinates from the corresponding point in TRE/RGN.
Also interesting. Cheers, Mark
On Feb 23, 2009, at 20:31, Mark Burton wrote:
I wonder what would happen if instead of changing the geometry, we just lied about the angles in NOD.
That's a really interesting idea, can you try doing that sometime?
Attached is a patch (compiles but untested) that should nudge the headout of motorway exit link roads to the left by 15 degrees. It's obviously a horrible hack, but it'd be interesting to see to what extent it has any effect, in particular on turn instructions. If you're driving on the right side of the road, change NUDGE_DEG to a positive value. I've also lowered *_link road class for safety, though this may not be necessary. Cheers Robert
On Feb 24, 2009, at 11:01, Robert Vollmert wrote:
On Feb 23, 2009, at 20:31, Mark Burton wrote:
I wonder what would happen if instead of changing the geometry, we just lied about the angles in NOD.
That's a really interesting idea, can you try doing that sometime?
Attached is a patch (compiles but untested) that should nudge the headout of motorway exit link roads to the left by 15 degrees. It's obviously a horrible hack, but it'd be interesting to see to what extent it has any effect, in particular on turn instructions.
Some small tests indicate that headout does indeed affect the turn instructions: For one motorway exit (very slightly to the right), the instruction to exit was "Keep left" -- I forgot to switch the sign of the nudging. For one cross-roads where the route said to go straight on, I also got a "Keep left". I didn't notice any bad effects due to the manipulated headout data, though I haven't checked route display at low zoom levels. One instruction that impressed me was "Turn left to Schwäbische Straße", instructing me to turn into an unnamed footway that lead to Schwäbische Straße. That appears to be the difference between "to" and "on". I wonder if this also works for multi-routenode unnamed ways, or if possibly this feature requires links? It would probably be good if link roads did not get a label, so at motorway junctions you get instructions like "Keep right to A4" instead of "Keep right on <name/ ref of link road". Anyhow, routing worked nicely and pointed out plenty of errors in the data. The routes are unfortunately not terribly good for bicycles. Cheers Robert
participants (3)
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Jani Patanen -
Mark Burton -
Robert Vollmert