Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it. Do other people see good routing performance on the more recent Nuvis? Cheers, Mark
Do other people see good routing performance on the more recent Nuvis?
I definately do. Routing even works (mysteriously, I guess) when routing from Garmin map to OSM map - did that recently for a Nuvi 205 with Benelux on it, to go somewhere in Germany. Routing works really well, I think - apart from some bike route that don't work too well, giving you long distances where short ones will do, but for those I question the Nuvi routing algorithm more than the abilities of mkgmap. V.
Mapsource routing is very different from the routing on the device. I use only a Vista Hcx and it can route most of the times across multiple tiles. Mapsource typically gives up on more than 3 tiles. have built a test with only some motorways and primary where only 2-3 routes are possible. But Mapsource will still fail. All segments are routable if some via points are inserted. On a commercial Garmin map it is possible to route across huge distance and many tiles. It's very slow but it works. There is still some secret in the Garmin maps about multi tile routing On 5 Sep 2009, at 3:44 , Mark Burton wrote:
Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it.
Do other people see good routing performance on the more recent Nuvis?
Cheers,
Mark
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Hi Mark On 05/09/09 11:44, Mark Burton wrote:
Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it.
Previously someone claimed that on mapsource you needed a routable basemap to get good inter-tile routing, but that on a GPS device you don't. As the basemap is not sent to the device that makes sense. On the other hand the device may already have a routable base map and so perhaps it uses that if it has one and is the source of the observation. I know that on my Legend Cx which does not have a UK base map I do not get very good routing across tiles. ..Steve
On 5 Sep 2009, at 9:15 , Steve Ratcliffe wrote:
Hi Mark
On 05/09/09 11:44, Mark Burton wrote:
Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it.
Previously someone claimed that on mapsource you needed a routable basemap to get good inter-tile routing, but that on a GPS device you don't. As the basemap is not sent to the device that makes sense.
Not sure about Mapsource. Roadmap for Mac has the basemap. But still routing doesn't work as good as on the Vista. Wild guess the Vista uses the basemap but Roadmap doesn't.
On the other hand the device may already have a routable base map and so perhaps it uses that if it has one and is the source of the observation.
I know that on my Legend Cx which does not have a UK base map I do not get very good routing across tiles.
does anyone know how to disable the basemap on a Vista? Another wild guess can it be that Garmin adjusts the basemap names/ boundary nodes .... with their map products on tile boundaries to help routing?
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Apollinaris Schoell wrote:
On 5 Sep 2009, at 9:15 , Steve Ratcliffe wrote:
Hi Mark
On 05/09/09 11:44, Mark Burton wrote:
Playing with my shiny new Nuvi 255, I notice that it can route across an OSM map of the UK pretty well. It can find long routes reasonably quickly. In comparison, mapsource 6.13.6 often fails to determine a route at all and when it does it is rather slow about it.
Previously someone claimed that on mapsource you needed a routable basemap to get good inter-tile routing, but that on a GPS device you don't. As the basemap is not sent to the device that makes sense.
Not sure about Mapsource. Roadmap for Mac has the basemap. But still routing doesn't work as good as on the Vista. Wild guess the Vista uses the basemap but Roadmap doesn't.
On the other hand the device may already have a routable base map and so perhaps it uses that if it has one and is the source of the observation.
I know that on my Legend Cx which does not have a UK base map I do not get very good routing across tiles.
does anyone know how to disable the basemap on a Vista? Another wild guess can it be that Garmin adjusts the basemap names/ boundary nodes .... with their map products on tile boundaries to help routing?
Really disabling is impossible. What is possible to flash a non routable US Basemap which you include in firmware. To go back do the same for the european basemap. I once flashed my hometile of OSM. You can put maps up to around 12Mb as Basemap. Doing such things is however very prone to sending your GPS into Walhalla. Most of this stuff has been found out by the eastern groups of sellers of imported Garmin units and pirated maps. There is even a way to flash your serial number (and thereby takeover Garmin Accounts from other people) I have not yet seen such a tool in the wild, only pics with range of units with identical serial number that I take for not faked judging the people who have published them. I am sure they use this to sell you "orignial European units" as the serial number should usually be enough to send the gps to German support (instead of having to send it to Garmin UK). Too bad that those groups not start hacking the firmware to offer some needed functions (e.g. reading tracks from SD, or optimising the routing algorithm for offroad navigation) but only focus on cracking for commercial success.
..Steve _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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Really disabling is impossible. What is possible to flash a non routable US Basemap which you include in firmware. To go back do the same for the european basemap. I once flashed my hometile of OSM. You can put maps up to around 12Mb as Basemap. Doing such things is however very prone to sending your GPS into Walhalla.
will do that when I feel like I need a new one anyway. The Garmin flash process is not very stable and had already troubles 2 times. Once the unit was exchanged under warranty and 2nd time I could fix it with the download version instead the webupdater.
Most of this stuff has been found out by the eastern groups of sellers of imported Garmin units and pirated maps.
There is even a way to flash your serial number (and thereby takeover Garmin Accounts from other people) I have not yet seen such a tool in the wild, only pics with range of units with identical serial number that I take for not faked judging the people who have published them. I am sure they use this to sell you "orignial European units" as the serial number should usually be enough to send the gps to German support (instead of having to send it to Garmin UK). Too bad that those groups not start hacking the firmware to offer some needed functions (e.g. reading tracks from SD, or optimising the routing algorithm for offroad navigation) but only focus on cracking for commercial success.
to sad they don't and we are offering so much for free with OSM
Ralf Kleineisel wrote:
Apollinaris Schoell wrote:
I know that on my Legend Cx which does not have a UK base map I do not get very good routing across tiles.
My eTrex Legend HCx without European basemap gives me better routing than mapsource does.
I think this is really map dependent. With my maps (openmtbmap.org), Mapsource gives much better routing, because on GPS routes quickly go over the maximum direction change number, which is much lower on GPS compared to Mapsource. Routes have to be "fixed" with wingdb if longer than 5-20km, because otherwise vista HCx can't recalculate them. So GPS is better in calculation straight routes via highways (e.g. with street-centric maps, or City Navigator) but run quickly out of memory on maps sending you offroad. This is either with nonroutable US or nonroutable OSM Basemap.
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Steve Ratcliffe schrieb:
Previously someone claimed that on mapsource you needed a routable basemap to get good inter-tile routing, but that on a GPS device you don't. As the basemap is not sent to the device that makes sense.
Can I load the basemap from my Etrex to Mapsource ? Or is there another way to get a basemap for mapsource? Chris
participants (7)
-
Apollinaris Schoell -
Chris-Hein Lunkhusen -
Felix Hartmann -
Mark Burton -
Ralf Kleineisel -
Steve Ratcliffe -
Valentijn Sessink