Need some information about routing

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Need some information about routing

Manfred Haiduk
Hi all

I've stumbeled about a small routing problem. I do create two types of
maps, one is called "myland" with nearly all informations to be found in
OSM, the other is called "mystreet" which do mainly show all streets but
less information about the surrounding. The two 'lines' files in the
appropriate styles are nearly same, except that for the street map all
the ways not suitable for automotive driving are not rendered.

My question is, using the same destination in either map, the routing is
slightly different in my Garmin 276Cx. For example, routing in the land
map uses some grade1 tracks within a forest, the street map does not.
But the tracks are  to be find in both maps. Anyone an idea, why this is
computed differently in the device ?

See also attached pictures

--

  Mit freundlichen Grüßen

#####################################################
Manfred Haiduk,
Zum Fischbach 9,
52393 Hürtgenwald
e-mail [hidden email]
#####################################################


_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev

Street Routing.JPG (489K) Download Attachment
Land Routing.JPG (490K) Download Attachment
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Re: Need some information about routing

Gerd Petermann
Hi Manfred,

If you created the two maps from exactly the same input files and with the same options reg. routing I assume that this is caused by the differences in the two lines files. Can't say more without knowing the exact input data and options for mkgmap.

Gerd

________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Manfred Haiduk <[hidden email]>
Gesendet: Dienstag, 3. Juli 2018 16:35:21
An: [hidden email]
Betreff: [mkgmap-dev] Need some information about routing

Hi all

I've stumbeled about a small routing problem. I do create two types of
maps, one is called "myland" with nearly all informations to be found in
OSM, the other is called "mystreet" which do mainly show all streets but
less information about the surrounding. The two 'lines' files in the
appropriate styles are nearly same, except that for the street map all
the ways not suitable for automotive driving are not rendered.

My question is, using the same destination in either map, the routing is
slightly different in my Garmin 276Cx. For example, routing in the land
map uses some grade1 tracks within a forest, the street map does not.
But the tracks are  to be find in both maps. Anyone an idea, why this is
computed differently in the device ?

See also attached pictures

--

  Mit freundlichen Grüßen

#####################################################
Manfred Haiduk,
Zum Fischbach 9,
52393 Hürtgenwald
e-mail [hidden email]
#####################################################

_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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Re: Need some information about routing

Ticker Berkin
Could the extra routing nodes cause a time penalty in the routing
algorithm, in a similar way that 'sharp-angle-fixer' attempts to deal
with?

Ticker

On Sat, 2018-07-07 at 08:01 +0000, Gerd Petermann wrote:

> Hi Manfred,
>
> If you created the two maps from exactly the same input files and
> with the same options reg. routing I assume that this is caused by
> the differences in the two lines files. Can't say more without
> knowing the exact input data and options for mkgmap.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <[hidden email]> im Auftrag
> von Manfred Haiduk <[hidden email]>
> Gesendet: Dienstag, 3. Juli 2018 16:35:21
> An: [hidden email]
> Betreff: [mkgmap-dev] Need some information about routing
>
> Hi all
>
> I've stumbeled about a small routing problem. I do create two types
> of
> maps, one is called "myland" with nearly all informations to be found
> in
> OSM, the other is called "mystreet" which do mainly show all streets
> but
> less information about the surrounding. The two 'lines' files in the
> appropriate styles are nearly same, except that for the street map
> all
> the ways not suitable for automotive driving are not rendered.
>
> My question is, using the same destination in either map, the routing
> is
> slightly different in my Garmin 276Cx. For example, routing in the
> land
> map uses some grade1 tracks within a forest, the street map does not.
> But the tracks are  to be find in both maps. Anyone an idea, why this
> is
> computed differently in the device ?
>
> See also attached pictures
>
> --
>
>   Mit freundlichen Grüßen
>
> #####################################################
> Manfred Haiduk,
> Zum Fischbach 9,
> 52393 Hürtgenwald
> e-mail [hidden email]
> #####################################################
>
> _______________________________________________
> mkgmap-dev mailing list
> [hidden email]
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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Re: Need some information about routing

Gerd Petermann
Either this or the extra nodes simply cause the routing algo to stop looking at a possible route. I think the algo prefers a route with fewer
nodes.

Gerd

________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Ticker Berkin <[hidden email]>
Gesendet: Samstag, 7. Juli 2018 12:05:11
An: [hidden email]
Betreff: Re: [mkgmap-dev] Need some information about routing

Could the extra routing nodes cause a time penalty in the routing
algorithm, in a similar way that 'sharp-angle-fixer' attempts to deal
with?

Ticker

On Sat, 2018-07-07 at 08:01 +0000, Gerd Petermann wrote:

> Hi Manfred,
>
> If you created the two maps from exactly the same input files and
> with the same options reg. routing I assume that this is caused by
> the differences in the two lines files. Can't say more without
> knowing the exact input data and options for mkgmap.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <[hidden email]> im Auftrag
> von Manfred Haiduk <[hidden email]>
> Gesendet: Dienstag, 3. Juli 2018 16:35:21
> An: [hidden email]
> Betreff: [mkgmap-dev] Need some information about routing
>
> Hi all
>
> I've stumbeled about a small routing problem. I do create two types
> of
> maps, one is called "myland" with nearly all informations to be found
> in
> OSM, the other is called "mystreet" which do mainly show all streets
> but
> less information about the surrounding. The two 'lines' files in the
> appropriate styles are nearly same, except that for the street map
> all
> the ways not suitable for automotive driving are not rendered.
>
> My question is, using the same destination in either map, the routing
> is
> slightly different in my Garmin 276Cx. For example, routing in the
> land
> map uses some grade1 tracks within a forest, the street map does not.
> But the tracks are  to be find in both maps. Anyone an idea, why this
> is
> computed differently in the device ?
>
> See also attached pictures
>
> --
>
>   Mit freundlichen Grüßen
>
> #####################################################
> Manfred Haiduk,
> Zum Fischbach 9,
> 52393 Hürtgenwald
> e-mail [hidden email]
> #####################################################
>
> _______________________________________________
> mkgmap-dev mailing list
> [hidden email]
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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Re: Need some information about routing

Manfred Haiduk
In reply to this post by Gerd Petermann
Hi Gerd

thanks for the first answer. I will do some more tests, especially
really using the exact same input data for building land and street map.
Up to now, i thought, i used the same, but in my device i have had maps
of whole europe and for testing only nordrhein westfalen. So the
observation might not be complete correct.


Am 07.07.2018 um 10:01 schrieb Gerd Petermann:

> Hi Manfred,
>
> If you created the two maps from exactly the same input files and with the same options reg. routing I assume that this is caused by the differences in the two lines files. Can't say more without knowing the exact input data and options for mkgmap.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <[hidden email]> im Auftrag von Manfred Haiduk <[hidden email]>
> Gesendet: Dienstag, 3. Juli 2018 16:35:21
> An: [hidden email]
> Betreff: [mkgmap-dev] Need some information about routing
>
> Hi all
>
> I've stumbeled about a small routing problem. I do create two types of
> maps, one is called "myland" with nearly all informations to be found in
> OSM, the other is called "mystreet" which do mainly show all streets but
> less information about the surrounding. The two 'lines' files in the
> appropriate styles are nearly same, except that for the street map all
> the ways not suitable for automotive driving are not rendered.
>
> My question is, using the same destination in either map, the routing is
> slightly different in my Garmin 276Cx. For example, routing in the land
> map uses some grade1 tracks within a forest, the street map does not.
> But the tracks are  to be find in both maps. Anyone an idea, why this is
> computed differently in the device ?
>
> See also attached pictures
>
> --
>
>    Mit freundlichen Grüßen
>
> #####################################################
> Manfred Haiduk,
> Zum Fischbach 9,
> 52393 Hürtgenwald
> e-mail [hidden email]
> #####################################################
>
> _______________________________________________
> mkgmap-dev mailing list
> [hidden email]
> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
>

--

  Mit freundlichen Grüßen

#####################################################
Manfred Haiduk,
Zum Fischbach 9,
52393 Hürtgenwald
e-mail [hidden email]
#####################################################

_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev