I understand the terms and conditions WRT use of Google Earth imagery in external applications are strict.
Years ago ArcBruTile offered such service in ArcGIS the legallity of which was questionable. (Google Earth is imagery option was later removed) Bing imagery is still an option but I am not sure how this is possible if ESRI states that in order to use Bing imagery the service must be purchased from Microsoft.
Where can I find the terms and conditions of use of Google Earth imagery in QGIS as provided by the OpenLayers plugin?
I like the idea, i just want to make sure it's legal. Can i produce maps for professional use and publications with this plugin, etc.?
ANSWER:
@Andre Joost pointed me to the answer. In short, this type of use is not permitted under Google's Terms of Service:
10.1 Restrictions on How You May Use the Maps API(s). Except as explicitly permitted in Section 8 (Licenses from Google to You) or the Maps APIs Documentation, you must not (nor may you permit anyone else to) do any of the following:
10.1.1. General Restrictions.
(a) No Access to Maps API(s) except through the Service. You must not access or use the Maps API(s) or any Content through any technology or means other than those provided in the Service, or through other explicitly authorized means Google may designate. For example, you must not access map tiles or imagery through interfaces or channels (including undocumented Google interfaces) other than the Maps API(s).
Best Answer
You can find a statement of the plugin author with a link to the terms of use here:
https://www.mail-archive.com/qgis-developer@lists.osgeo.org/msg21665.html
My opinion: If Google does not want you to use their service, just don't use it. There are plenty other possibilities, some even free of cost, like Openstreetmap.