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Old July 11th 18, 04:12 PM posted to alt.home.repair,rec.autos.tech
micky
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Posts: 383
Default how does the map get into the radio?

In rec.autos.tech, on Wed, 11 Jul 2018 00:15:24 -0400, micky
> wrote:

>In a new car radio with GPS, how does the map get into the radio? Does
>it receive cellular data, wifi, or come already installed?


No question, just background:

A couple weeks ago I went to Harrisburg, Pa. and took the long way home
to Baltimore because it's more interesting.

Along the east shore of the Susquehanna River. After a while I wanted
to see where I was, largely because there are bridges over the river
near Harrisburg and between Lancaster and York. And again on Route 1
and I-95.

But there is only one bridge in between those 2 areas.

Two years ago I had to ask for directions, and the first 4 people said
they were visitors and didn't know! Turns out, the road to the bridge
doesn't say it goes to the bridge! No signs.


The car's GPS was too vague, and you can only slide the map a little bit
away from where I am now, and even then it bounces back. Zooming out
takes away too much detail.

Because I'd driven this way once before, I'd forgotten to reload maps to
the phone, google maps and maps.me, so google maps only had the map it
comes with that that covers the whole US. Showed where I was, even
though it didnt' show a road there. Almost enough, but not quite.

I ended up using my paper map of the entire state of Pennsylvania, that
is 20 or 30 years old. Can't zoom in but it still had enough landmmarks
and highway numbers that it worked. I carry maps for Md. and adjacent
states in the car all the time.

If the car didn't have GPS, I wouldn't miss it, wouldn't want it, but it
has a rudimentary form of it that tantalizes me.

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