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#1 2022-08-30 10:13:52

H4N5-antw
Member
From: Antwerp, Belgium
Registered: 2020-11-20
Posts: 5

How to obtain 'fresh, overnight' maps, please?

Plan was, to ride a bicycle to a destination some 50km away, go there for a walk ; in setting the route found that several errors had been introduced in the process of further improving OSM ; amended, based on aerial imagery and in many instances local knowledge.

First and foremost, change set comments are of course the correct way to alert the mappers concerned, and they're used for that purpose ; here the question is on a different aspect :

It would be helpful if there were a way to download a 'fresh', 'overnight' map fragment.
Does such an option exist, and how can a mildly active mapper access such an extract service, please?

- - -

In this case the fragment would measure 50km west>east and 15km south>north, to load onto an Oregon700, so that turn instructions will be based on the updated map rather than send me on detours where (although undoubtedly well-intended but) unfortunately careless* and/or ill-considered** mapping introduced virtual no-go areas.

- - -

Here below the starred terms used are clarified, including some of the issues which cause those detours, it may be disregarded for the purpose of pointing to a source of 'fresh' map fragments.

* In an above paragraph, 'careless' is used to indicate that the mapper did not, before committing the change, sit back to take a look at the consequences of adding for example 'vehicle=no' or 'bicycle=use_sidepath' (careless, as it seems obvious that in order to take that path the path needs to be on the map, in this case it wasn't) or added a separate cycle track yet overlooked connections to side streets , or added a one-way=yes or 'access:vehicle=no' restriction either based on an incomplete Mapillary traffic sign recognition or a temporary sign where closure is due to a local one-day event or long since completed road works.

** Ill-considered is where one mapper added a way, drew it to connect to a cross-road which was later, by another mapper, tagged as bicycle=no (the cross road is a motorway link, it concerns a cycle path which continues after the crossing, and actually, the 'motorway regulations end' sign is placed before one reaches the cycleway - hence it is no longer a motorway at that point, or the instance where a prolific mapper correctly added a short (10m?) stretch where, once a separate cycle-crossing had been built, the still visible and blocked cycle lane ought not to be used, but in doing so also marked a much longer stretch of that way as cycle-lane=no, even though a cycle lane does exist; the effect is that one who relies on OSM needlessly crosses a fairly busy road twice.

While I'm at it : another cause of routing errors are 'wenslijnen' (Flemish for 'wish lines'), where cycleways which will undoubtedly be built at some point in the far or near future (but so far haven't entered the detailed planning process) are already added as a cycle route relation (rationale : if -at some point in the futute- someone spots and draws a way, it will automagically be tagged as 'Fiets-o-strade' (Flemish word for a purpose built nice 'n straight cycle highway, often alongside railway tracks - what could be nicer than mapping cycling infrastructure from the comfort of a train? (What would be nicer is not arriving at a spot where there is no usable highway ; this is caused by route planners, in selecting the low traffic or scenic option, look for marked cycle routes, and as the wenslijnen are marked as cycle route the non-existent way is included in the plan. 

Looking forward,

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#2 2022-08-30 13:59:30

muralito
Member
Registered: 2012-09-04
Posts: 1,918

Re: How to obtain 'fresh, overnight' maps, please?

H4N5-antw wrote:

It would be helpful if there were a way to download a 'fresh', 'overnight' map fragment.
Does such an option exist, and how can a mildly active mapper access such an extract service, please?

- - -

In this case the fragment would measure 50km west>east and 15km south>north, to load onto an Oregon700, so that turn instructions will be based on the updated map rather than send me on detours where (although undoubtedly well-intended but) unfortunately careless* and/or ill-considered** mapping introduced virtual no-go areas.

Hi. I don't know about such "Garmin ready map" service.

But, you can download the fresh raw OSM data anytime, and make your own Garmin map customized to your needs, using the same data and software that the free map providers use. Have a look at mkgmap https://www.mkgmap.org.uk/ which is the software to do this conversion between OSM data and Garmin img format.

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#3 2022-08-30 14:30:00

SK53
Member
Registered: 2009-01-11
Posts: 705

Re: How to obtain 'fresh, overnight' maps, please?

For relatively small areas bbbike provide uptodate garmin maps (I think refreshed daily)

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#4 2022-08-31 08:54:57

H4N5-antw
Member
From: Antwerp, Belgium
Registered: 2020-11-20
Posts: 5

Re: How to obtain 'fresh, overnight' maps, please?

'Next morning' update, first of all to thank two forum members who added from their knowledge, also to add what I found on the suggested options - thus saving others the need to research those points for themselves. 

Dear SK53,

Thank you for the reply. From https://extract.bbbike.org/extract.html , FAQ pt. 7 : "The planet.osm database will be updated every week. For details look at the BBBike planet.osm mirror" : doesn't look promising, and indeed https://download.bbbike.org/osm/planet/ shows two sets of .PBFs : planet-daily and planet-latest ; planet-daily shows the most recent 'around midnight' time stamp, planet-latest Saturday's at noon.

From the section below the FAQ on the extract page :
The Extract Pro service offers extracts with a daily update of the database (at 0:00 UTC), due the higher system load, BBBike offers the Extract Pro service (which also allows to extract larger areas and bigger files) at a cost starting at 99 Euro/month, depending various factors. Now retired, I'm happy to offer some of my time, but reluctant to spend that much money for an updated map.

Looking at https://download.bbbike.org/osm/planet/ : the free-of-charge planet-latest PBFs are available on Saturdays just after noon Brussels time; to confirm, this Wednesday 31 aug at 9am downloaded an extract which includes  yesterday morning's edits : they aren't visible on the fragment.

So far, the OpenFietsMap.nl BeNeLux map , available on Saturday mornings (except end August + early September, and possibly other dates) , seems the most likely candidate to obtain a ready made map incorporating 'my' edits.


Dear @muralito,

Hence the way forward is via @muralito's mkgmap option; the Geofabrik Belgium PBF (485MB) is available from https://download.geofabrik.de/europe/belgium.html on a daily basis , was updated at approx.  2022-08-29T20:30Z = time zone 'Z' = UTC , refreshing the page this morning shows 'last modified' at circa 2022-08-30 T20:30Z > thus indeed daily updates. 

As an aside, several minutely, hourly, daily and weekly diffs and PBF updates are listed at https://wiki.openstreetmap.org/wiki/Pla … ownloading , but several of those are the 65GB full planet - which is a bit over the top for a 120MB fragment.

In the end, Geofabrik's Belgium PBF - at 490MB - seems the most sensible way.

Next steps : install mkgmap from https://www.mkgmap.org.uk/ , and start trying ... (to be continued)

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