There is no problem if you store
- latitude and longitude
- addresses
As those would be "user preferences" in your app.
The restrictions on data export refer to the tiles and photos used to display the maps. In general people want this feature to have a cache mechanism or provide offline functionality. This is not allowed* and only the official mobile app has this features.
*Google actually allows it, but you have to read the finer print, more on that below.
Longer answer, analyzing the ToC:
No Pre-Fetching, Caching, or Storage of Content. You must not pre-fetch, cache, or store any Content...
What does content mean? This is map tiles, terrain tiles, photos of places, satellite photos etc. The content, in the ToC, is anything that has been created by Google and provided as part of the Google map service. But, not everything provided in the service has been created nor is owned by Google.
- Addresses are not created or owned by Google, this is public information. What Google has done is to gather them and put them in a presentable, easy to search, interface. But it is not part of "the content".
- GPS locations are not created or owned by Google, this is public information as well. In fact, GPS was created by the department of defense (DoD) in the US. They are the ones who control its use.
...For example, you must not use the Content to create an independent database of "places" or other local listings information.
It wouldn't be fair to Google if you downloaded a subset of the content, lets say all the tiles and photos for your home town. Once you have your copy of the files, you do a little processing on them, maybe add trivia or fun facts that only you know because you grew up there. And then use that to provide a re-branded service. Something called JimboMaps perhaps. That is the type of thing that is prohibited.
you may store: (i) limited amounts of Content for the purpose of improving the performance of your Maps API Implementation if you do so temporarily
Guess what, you are actually allowed to store content in you database. Any of it, photos, tiles etc. The catch is:
- You can store limited amounts. A few blocks, probably a small region is ok. But don't store a whole town or suburb.
- You can't store anything for more than 30 days.
- The only valid reason to do this is performance improvement of your application. See this: Google Maps v3 - Map tile caching on client?
...you must not use the Content to create an independent database of "places" or other local listings information.
It is just saying that you are not allowed to create JimboMaps.