[Qgis-user] offline basemap in Qfield

[Roland Berger]

There is also the concept of "Shared local datasets": 
https://docs.qfield.org/how-to/outside-layers/?h=local
It is useful if you need the same dataset (orthophoto/basemap) in 
different projects.

Kind regards
Roland

On 10/14/24 16:00, Saber Razmjooei via QGIS-User wrote:
> If you use www.merginmaps.com <http://www.merginmaps.com> QGIS plugin, 
> it will allow you to download our own vector tiles generated from 
> OpenStreetMaps using OpenMapTiles schema for offline usage.
>
> Kind regards
> Saber
>
>
> On Mon, 14 Oct 2024 at 14:59, Greg Troxel via QGIS-User 
> <qgis-user at lists.osgeo.org> wrote:
>
>     "Huesmann, Michaela via QGIS-User" <qgis-user at lists.osgeo.org> writes:
>
>     > I would like to record data with Qfield using my Android mobile
>     > phone. In order not to use too much data volume, the base maps
>     should
>     > be downloaded via WiFi beforehand so that they can be used offline
>     > outside. However, GPS must be used for orientation during the mobile
>     > recording process. My questions about this:
>     > 1. Which map material for Germany can be used offline as base
>     map in my qfield project and how can I download it?
>     > 2. How do I ensure that the offline maps are used outside and
>     that no download takes place while I navigate with GPS?
>
>     You didn't explain
>
>       - How much data is too much?
>
>       - What happens in terms of data if you just use an OSM mapnik
>     basemap
>         + in particualr, what if you open qfield on wifi and pan around to
>           all the places you are going to be, to cause it to fetch data.
>           Note that OSM requires that users of its tile service cache data
>           for a reasonable period of time (7 days?), and thus QField
>     should
>           be caching.
>
>       - What size area you are operating in?
>
>     I mean to ask "are you really sure you have a problem that needs
>     solving?"
>
>     It is straigthforward to make a raster image of a small area and use
>     that via "copy" in the now-oddly-named "cable" export.  (I use
>     nextcloud
>     to exchange bits, not an actual cable...)
>
>     Making something that can cover a larger area at varying resolution
>     probably involves some sort of tiles-in-sqlite format.
>
>     In general, the only map data that I'm aware of with licensing that
>     permits this sort of use is OpenStreetMap, and in the US, government
>     data from the federal government and a number of states.  (I have no
>     knowledge.de <http://knowledge.de>, but I'd expect similar -- OSM
>     and maybe government.)
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>
>
> -- 
> Saber Razmjooei
> www.lutraconsulting.co.uk <http://www.lutraconsulting.co.uk>
> +44 (0)7568 129733
>
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