[mkgmap-dev] GRMN_TYPE

Tue Jan 30 17:50:35 GMT 2024

Hi Brad

There are various resources on the internet that list type codes that have a
defined Garmin meaning.

I don't know of inaccuracies in mkgmap mapnic.txt, but it might not be complete
and it might include less standard/common meanings.

Most Garmin meanings from above are common to most devices but there are
exceptions. Worst are the cases where a device simply won't render a particular
type code, regardless of a supplied typ representation.

The Garmin device "Find" mechanism relies on in-built ranges of point and line
types, along with mkgmap building the required indexing data into the map image.
Many of these can be gleaned from the default style.

So yes, a Garmin device might do something different to what you expect. You
need to experiment to find out when.

Ticker

On Tue, 2024-01-30 at 09:36 -0700, brad wrote:
> So, if they don't have a comment they don't have a standard Garmin 
> usage?  Do all garmin devices follow the standard garmin usage?   I 
> think not, but I don't have solid evidence other than it seems like some 
> line types 0x06, 0x07, 0x18 won't show on a zumo XT.
> 
> I'm trying to understand:  when I use a typ code, and my own typ file,  
> when does garmin do something differently than what I expect?
> 
> 
> On 1/30/24 02:39, Ticker Berkin wrote:
> > Hi Brad
> > 
> > Lines like this follow the type code and, as a comment, describe the
> > standard
> > Garmin usage, eg:
> > 
> > ...
> > [_polygon]
> > type=0x02
> > ;GRMN_TYPE: Urban Areas/SMALL_CITY/Small urb...nts/Non NT
> > String=Suburb
> > String1=0x01,Résidentiel
> > ...
> > 
> > Ticker
> > 
> > On Mon, 2024-01-29 at 17:43 -0700, brad wrote:
> > > I was comparing a fairly new TYP  file (r4905 mapnik.txt) with my own
> > > (grown from Openfietsmap quite a while ago) and noticed there was
> > > usually a line like this
> > > 
> > > ;GRMN_TYPE: Roads/HIGH_SPEED_RAMP, RAMP/Highway ramp which is to be
> > > driven at high speeds/Non NT, NT
> > > 
> > > or
> > > 
> > > ;GRMN_TYPE: //
> > > 
> > > What is the meaning of this?
> > > 
> > > Thx
> > > Brad
> > > _______________________________________________
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