[Emux]

Mapsforge POI specification will advance to version 2.

That will provide “proper” multiple categories per POI and more efficient storage (as had discussed with Christian and Tobias).

– POI writer will produce only the newer v2 .poi files
– POI readers will be compatible with both v2 and v1 .poi files

Thanks to community work and more info is in Mapsforge forum announcement.

Emux

[Tobias]

Thanks Emux, great news (again). Lots of good developments at the mapsforge community at the moment, I’m looking forward to test it (when I have a bit more time at hand)…

Developer of Elevate mapstyle

[Emux]

Mapsforge POI version 2 is now available.

You can use master poi-writer to produce poi v2 files.

Cruiser (Android + Desktop) was also published with POI v2 (and v1) compatibility.

Emux

[ChristianK]

Hi Emux,

If I got this right – POI_V2 files will be compatible with (eg) Oruxmaps when the Orux will implement the new Lib in the App?

Best regards
Christian

[Emux]

Hi Christian,

Mapsforge poi reader(s) are compatible with both v1 and v2 poi files, so you’re right!

Emux

[ChristianK]

Hi Emux,

I tried V2 Pois – yes I know, late very late – and got an error see attached logfile.

Pllease can you take a look at the poi-mapping.xml.
A tag that is assigned to more than one cat is (eg.) alpine_hut
Up to now I added one ore more blanks to the tags name to avoid this error, but that should’nt be the solution.

thanks Christian

[Emux]

Do you have in poi mapping 2 same poi categories?
Is there some small poi mapping so can reproduce it easier?

[Emux]

By the way please report such cases in Mapsforge forum so that anyone from the community can better help.

[ChristianK]

Hi Emux,

Thanks for super fast answer, here are the files with only alpine_hut in two cats.

Best regards
Christian

[Emux]

What implemented in POI v2 is to support multiple categories per POI (see the related discussion / issue).

That is not hosting the same sub-category many times inside different parent categories in poi mapping tree.

1 user thanked author for this post.

ChristianK

[Juanjo]

Emux wrote:

What implemented in POI v2 is to support multiple categories per POI (see the related discussion / issue).

That is not hosting the same sub-category many times inside different parent categories in poi mapping tree.

Hi Emux,

I do think that having the same subcategory on several categories, like having ‘Alpine Huts’ in ‘Hiking’ and ‘Accomodation’ categories, makes sense. This was possible on the first version of the POI spec, see below.

SELECT * FROM poi_categories WHERE name LIKE '%Alpine Huts%' ORDER BY id
id	name	parent
16	Alpine Huts / Berghütten	24
30	Alpine Huts / Berghütten 	37
59	Alpine Huts / Berghütten  	65

So it looks to me like a regression in version 2

Regards

[Emux]

Juanjo wrote:

This was possible on the first version of the POI spec

It was never designed or worked that way in any version.
See Christian’s answer above (uses a trick):

ChristianK wrote:

Up to now I added one ore more blanks to the tags name to avoid this error, but that should’nt be the solution.

[Juanjo]

oh shit! 😉 I see now, there are spaces added to the second and third category names.

My understanding about the RTree stuff is that the index contains one entry for each record in poi_data table, unless I am missing something, it has nothing to do with categories.

Thank you for your quick response.

Regards

1 user thanked author for this post.

ChristianK

[ChristianK]

🙂

Nevertheless I will use the new POI-Writer from next update of OAM on.
It provides smaler files…

[Author]

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