[mkgmap-dev] Named bridges not displaying

Thu May 21 06:42:23 BST 2015

Hi Dave,

I agree that the rules to set a "name" are very confusing, esp. when it
comes to roads. I guess one reason is that it took a while to discover 
that a map object can have 4 labels,
another point is that we don't try to explain the Garmin format in this 
manual, instead we presume that the reader knows the details of the 
Garmin format quite well.
Maybe it would help to add a chapter with links to 
the corresponding manuals and wiki pages. 
If you have the time, please propose improvements, the sources are
almost normal text files.

Reg. your questions:
Why not addabel ? 
I thought you want to see the bridge name in the map. If that is the case, you have
to set mkgmap:label:1 . If you want to be able to find the bridge in address search,
you can use addlabel without problems.

Why doesn't set name='${bridge:name}' work?
Because it sets the tag name to a new /different value. If it is not followed
by a rule that uses this value to set mkgmap:label:* you will not see a change.

Gerd

From: daveswarthout at gmail.com
Date: Wed, 20 May 2015 12:09:55 -0700
Subject: Re: [mkgmap-dev] Named bridges not displaying
To: gpetermann_muenchen at hotmail.com

Thank you very much. That worked like a charm.
As for the style manual, 
4.3.6. nameThis sets the first label of the element but only if it is not already set. This is a helper action. The sameeffect can be produced with different notations as it is shown in the following example where all threelines have the same effect.   {name '${name} (${ref})' | '${ref}' | '${name}'}   {add mkgmap:label:1='${name} (${ref})' | '${ref}' | '${name}'}   mkgmap:label:1!=* {set mkgmap:label:1='${name} (${ref})' | '${ref}' | '${name}'}
How one would determine that this is a situation when one must assign a mkgmap label is beyond me. I could have read that description a thousand times and not figured out what to do. What's missing is WHY one would use the name directive in this way. And then, some information about the use of mkgmap:label:1 in these circumstances would be helpful too.
In scanning the manual I noticed another directive, addlabel which would assign the next available label level. Why didn't you use that? I'm thinking it's because you already knew the tags for these two bridges so you knew mkgmap:label:1 was not being used. But wouldn't addlabel be a "safer" way to go about this in the general case? 
One last question: During my struggles I tried using the set command, {set name='${bridge:name}' }, to replace the name of the section of highway that crosses the bridge with the bridge name but it didn't work. Could you venture a reason for that?

On Wed, May 20, 2015 at 10:02 AM, Gerd Petermann <gpetermann_muenchen at hotmail.com> wrote:

Hi Dave,

the name action has no effect when mkgmap:label:1 is already
set. You may move your rule before those 
that use the highway name, or you can use 
bridge=* & bridge:name=* {set mkgmap:label:1= '${bridge:name}'; echotags ""}
See style manual section 4.3.6

Gerd

From: daveswarthout at gmail.com
Date: Wed, 20 May 2015 09:49:43 -0700
To: mkgmap-dev at lists.mkgmap.org.uk
Subject: [mkgmap-dev] Named bridges not displaying

Thanks for all the good effort on the exit_to and destination issues. Everything is working well for me now.
I discovered another problem that might be simple to fix, or maybe there's something that I'm doing wrong. There are two named bridges in my current area but the names do not display on my maps.
I placed this rule in my lines style file:
bridge=* & bridge:name=* {name '${bridge:name}'; echotags ""}
here is the stderr output
221689337 - [highway=tertiary,ref=CR 48,mkgmap:label:2=Lower Smith River Road (CR 48),bridge=yes,name=Lower Smith River Road,bridge:name=Jack Franz Bridge,surface=asphalt,mkgmap:street=Lower Smith River Road,mkgmap:label:1= CR48 Lower Smith River Road,ele=1] 336150197 - [highway=residential,mkgmap:street=Goodpasture Road,mkgmap:label:1=Goodpasture Road,covered=yes,bridge=yes,bridge:name=Goodpasture Bridge,name=Goodpasture Road] 
The bridge name does not appear on the compiled maps.
Any ideas or suggestions?
Dave-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com

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-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com

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