You can change the cache settings of Google Maps to expand how much data
is pre-stored; then when you are at home near your wifi, pre-search the
area you intend driving to, zooming in and out to preload the various
levels of detail.  If you are going on a main highway for quite a ways,
you don't need high detail for that bit, just an overview, just get the
higher details for the destination in case you get lost in a back street.
If you do have a data connection and need to download more maps/detail,
I've found Google Maps don't use up all that much data at all, a couple of
megabytes at most for all levels of zoom for most of a city.

A problem with most tablets is that they don't have a magnetometer, so can
only interpolate which direction you are heading from successive GPS
reads; this is fine if you are driving relatively quickly, not so much if
you are say on a sailing boat.

PS. Someone mentioned a few days ago issues with cheap Chinese devices and
the market/play; there are always ways around this, many have third-party
hacks to bypass things, but the sure-fire way is to just browse the market
on the web, find the app name you want, and then track down an APK for
download.  You can then install via the downloaded .apk (essentially the
app in a self-contained format), bypassing the market.

Lee

> John Ferrell <jferrell13 <at> triad.rr.com> writes:
>> If it could keep the appropriate maps internally it would be a great
>> GPS. Unfortunately the absence of an internet connection soon renders
> I presume that Google Maps application is not what you are looking for?
> It
> does save offline maps and works with GPS, but I have never tried it in a
> car.


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