[Gambas-user] how to use gb.map offline?

[roberto.premoli at tiscali.it]

  Hello, 
unfortunately, the attach demo in .tar.gz format is
unreadable, the sistem tranform it into
AnotherMapDemo-0.0.1.tar.gz.gmail.txt and even if i rename it, it is not
un-tarrable.
can you provide attach in other way or put on a share
service on intenrnet?
Thanks,
Roberto

Il 28.01.2023 15:40 Fabien Bodard
ha scritto: 

> Le sam. 28 janv. 2023 à 15:13, a écrit : 
> 
>> Il
28.01.2023 14:55 Fabien Bodard ha scritto:
>> 
>> > Le sam. 28 janv.
2023 à 03:48, BB a écrit :
>> >
>> >> On 28/1/23 11:09 am,
roberto.premoli at tiscali.it [1] [2] wrote:
>> >>
>> >>> hello,
>> >>>
>>
>>> I started to play with gb.map component and it is amazing!
>> >>>
the question is: how to use it off line? I mean, my application 
>> >>>
will
>> >>> work without access to internet,
>> >>> so I must first
download the data of the area I need ( a region of
>> >>> italy) and
then tell to gb.map to search data on local harddisk.
>> >>> is it
feasible? if yes, how?
> 
> you can download all the datas on you ard
Disk ... (it's udge because it's png and not vector datas) 
> you can
achieve the full data extraction by understanding tiles are managed in
the server side (easy) 
> each tile file have a structure zoom-x-y.png
so the mapview can use it 
> you have all the tools needed to download
the full italy maps (18 zoom level) in the tilemap class source code 
>

>>>>> 
>> >>> Thanks,
>> >>> Roberto
>> >>>
>> >>
>> > Not a all 😅
>> >
Just add a buffer name to the map tile layer
>> > It will save the tiles
in .cache/gb.map/buffer name
>> > So you can use it in offline mode.
>>
> By the way this is a grow only cache.. I've not made any things to 
>>
> free
>> > it or update.
>> > (Todo things)
>> > It is not allowed to
store tiles from Google or other non free 
>> > source..
>> > 😉 but for
openstreetmap .. it's ok
>> >
>> 
>> To cache maps means that fist I
have to connect the system to internet, 
>> visit ALL the area that is
of my interest, so the module caches data 
>> locally for a next use. IT
is rusty, but it can be done, due to the fact 
>> that the map i am
interested in is quite little. But in case this will 
>> grow to a
region/country it is clearly not enough and need a local 
>> server to
provide data. Anyway, at the moment, i can use the "cache" 
>> trick.
So, here the questions:
>> A. how to activate the cache? can you provide
the prfof-of-concept 
>> program for this?
> 
> yep done B. how i have
to do the "caching" process? i mean, i 
> 
>> ALL data of italy will be
archived locally with ALL 
>> related details (streets, building, names,
etc). 
>> yes :-) ... 
>> near 269 000 000 files for italia 14 ko/file..
3766 gb ? ... I'm I wrong ? 
>> usually a user does not explore the
ful
> les 
> Map is a too level class... you can use Map solo for
priniting or static map, and mapwiew for dynamic map. 
> Thanks,
>
Roberto
> 
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>> ----[ http://gambaswiki.org/wiki/doc/netiquette [2] ]---- 
>> --

>> 
>> Fabien Bodard
  


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