[mkgmap-dev] Question about using different ROAD CLASS's andROAD SPEED's for one linetype.

Thu Mar 3 17:46:42 GMT 2016

Hi Greg,

why do you want to “free” some routeable line types?
If it is just for different display options, you can do another trick.
I am using 0x0c as an invisible line type just for routing purpose,
and non-routeable overlay linetypes to display roundabouts how they should look like.

highway=trunk & junction=roundabout                            [0x0c road_class=3 road_speed=2 resolution 24 continue with_actions]
highway=trunk & junction=roundabout                            [0x10202 resolution 17]
highway=primary & junction=roundabout                            [0x0c road_class=3 road_speed=1 resolution 24 continue with_actions]
highway=primary & junction=roundabout                            [0x10302 resolution 17]
highway=secondary & junction=roundabout                            [0x0c road_class=2 road_speed=1 resolution 24 continue with_actions]
highway=secondary & junction=roundabout                            [0x10402 resolution 18]
highway=tertiary & junction=roundabout                            [0x0c road_class=1 road_speed=1 resolution 24 continue with_actions]
highway=tertiary & junction=roundabout                            [0x10502 resolution 19]
highway=unclassified & junction=roundabout                        [0x0c road_class=0 road_speed=1 resolution 24 continue with_actions]
highway=unclassified & junction=roundabout                        [0x10602 resolution 21]
highway=residential & junction=roundabout                        [0x0c road_class=0 road_speed=1 resolution 24 continue with_actions]
highway=residential & junction=roundabout                        [0x10702 resolution 22]

You can use the same trick for all other routing lines also.
With a similiar trick (invisible main POI + visible overlay POIs) you can also club together POIs with different Icons to the same POI-List entry.

Walter

From: Gerd Petermann 
Sent: Thursday, March 03, 2016 6:30 AM
To: Development list for mkgmap 
Subject: Re: [mkgmap-dev] Question about using different ROAD CLASS's andROAD SPEED's for one linetype.

Hi Greg,

my understanding is that Garmin treats 0x0c special to produce the "leave roundabout at the nth ..." hints,

the same for 0x08 and 0x09 to produce the other exit hints. The calculation of the "nth" exit requires special logic,

that's why roundabouts need a special type. 

Gerd

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Von: mkgmap-dev-bounces at lists.mkgmap.org.uk <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von greg crago <gregcrago at gmail.com>
Gesendet: Donnerstag, 3. März 2016 00:10
An: Development list for mkgmap
Betreff: [mkgmap-dev] Question about using different ROAD CLASS's and ROAD SPEED's for one linetype. 

I noticed that I have one linetype (0x0c) for roundabouts and it had many different ROAD CLASS and ROAD SPEED

# Roundabouts
junction=roundabout & (highway=trunk | highway=trunk_link) [0x2a resolution 18 continue]
junction=roundabout & (highway=trunk | highway=trunk_link) [0x0c road_class=3 road_speed=2 resolution 18]
junction=roundabout & (highway=primary | highway=primary_link) [0x2d resolution 18 continue]
junction=roundabout & (highway=primary | highway=primary_link) [0x0c road_class=3 road_speed=1 resolution 18]
junction=roundabout & (highway=secondary | highway=secondary_link) [0x2e resolution 20 continue]
junction=roundabout & (highway=secondary | highway=secondary_link) [0x0c road_class=2 road_speed=1 resolution 20]
junction=roundabout & (highway=tertiary | highway=tertiary_link) [0x2f resolution 20 continue]
junction=roundabout & (highway=tertiary | highway=tertiary_link) [0x0c road_class=1 road_speed=1 resolution 20]
junction=roundabout & (highway=unclassified | highway=residential | highway=minor | highway=living_street) [0x25 resolution 22 continue]
junction=roundabout & (highway=unclassified | highway=residential | highway=minor | highway=living_street) [0x0c road_class=1 road_speed=1 resolution 22]

I also have 2 other linetypes for HIGH SPEED RAMPS (0x09) and LOW SPEED RAMPS (0x08):

highway=motorway_link [0x09 road_class=4 road_speed=7 resolution 15]
highway=trunk_link [0x09 road_class=4 road_speed=5 resolution 18]

highway=primary_link  [0x08 road_class=3 road_speed=1 resolution 18]
highway=secondary_link [0x08 road_class=2 road_speed=1 resolution 19]

MY QUESTION:

Can I combine all of these different ROAD_CLASS and ROAD_SPEED together using 0x0c and free up 2 routable linetypes? Yes, all the map elements would like the same.

Greg

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