Offline Maps for Geoscada

[Tyrone19]

Hi Community

Is there any offline maps sources that are open source that could be used to with Geoscada. I have a client that has no internet connection at all and wants to use the maps functionality for the location of his radios.

Thanks

[BevanWeiss · Accepted solution]

Yes, Open Street Maps is probably the one that you'd want to look into first.

Other than that.  It's about what data do you want?

Geo SCADA Expert just wants to connect to an WMS based Tile Map Server.  It doesn't really care what kind of data is on the tiles.

You can get public domain Topology maps from NASA and a few other governmental organisations, other jurisdictions have other map type data available (like here in AU it's possible to get flood plain data, bush fire data, socioeconomic data, etc).

Most of these are presented as 'live' accessible via a government site via the internet.  If you want to have your source sectioned off from the world, then you'll need to retrieve the raw data source, and present it through your own Tile Map Server.

ala https://openmaptiles.org/

There's a few platforms that provide similar capabilities.  I've used qGIS before for similar.

I should warn you however, it's a bit surprising how crappy the performance can be if you just quick-build such a platform.  Like you can throw 8 CPU cores, and 16GB of RAM and SSD disks at it.. and yet it will still feel dramatically slower to access than the internet hosted OpenStreetMaps server.  Perhaps it's just been my bad configurations... but there is obviously a lot of performance which comes from tweaking things... and it's hard to find the time (and knowledge) to tweak the right settings.

I'd probably put in a non-caching proxy server configuration (probably just hosted on a SCADA internal firewall) to do the separation bit...  you can have the proxy act as SSL client, and do some introspection on returned mimetypes etc.  Likely not bulletproof, but you could make it a pretty narrow window.