| Author |
Slaved moving maps?
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| nomail-nospam@no.org 2008-01-23, 4:33 am |
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I'm new to laptops and gps sensors, just putting a
linux system together. Are there any slaved moving
map applications that use compass info from a gps
sensor or some other source?
I haven't heard of any so far.
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| Mark Hewitt 2008-01-23, 4:33 am |
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<nomail-nospam@no.org> wrote in message news:fn6pv8$nve$1@ai
oe.org...
>
> I'm new to laptops and gps sensors, just putting a linux system together.
> Are there any slaved moving map applications that use compass info from a
> gps sensor or some other source?
>
> I haven't heard of any so far.
>
Memory Map?
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| nomail-nospam@no.org 2008-01-25, 10:33 pm |
| Mark Hewitt wrote:
> <nomail-nospam@no.org> wrote in message news:fn6pv8$nve$1@ai
oe.org...
>
> Memory Map?
>
>
???
I don't know what you mean. My idea is for a map image that
rotates to be always slaved on north ..in addition to moving.
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| Jack Erbes 2008-01-26, 7:33 am |
| nomail-nospam@no.org wrote:
<snip>
> I don't know what you mean. My idea is for a map image that rotates to
> be always slaved on north ..in addition to moving.
>
The phrase "slaved to north" does not really compute. But one feature
of many GPS receivers is to have the choice of displaying the map in the
either the course up or north up mode. If that is what you are asking
about, it is a common feature on most navigation software.
Jack
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| Jack Erbes 2008-01-28, 7:33 am |
| nomail-nospam@no.org wrote:
<snip>
> I don't know what you mean. My idea is for a map image that rotates to
> be always slaved on north ..in addition to moving.
>
This is the common feature I mentioned that allows a choice of course
up, track up, or north up. "Up" in this case is the top of the display.
I don't know how much you know about navigation, maybe the following
will help:
Course = the heading of the vehicle as defined by your planned or
intended direction of travel, basically a line drawn from your starting
point to your destination.
Heading = Your actual direction of travel as defined by a line drawn
through your last few last few fixes and projected forward.
North Up = Keeping the map with north (magnetic or true, as you select
normally) at the top of the display as the map pans with your movement.
Typically your location would be centered on the display and marked by
a icon.
For linux, I don't know of a good mapping application. But I think to
get something that is up to date and common in use, you may have to
consider using one of the Windows emulators and using an applications
like Garmin's MapSource products, Micro$oft's Street & Highways, or
something like that.
Here is a link to a site that has some good info on GPS in general and
third party applications for use with GPS receivers:
http://gpsinformation.net/
http://gpsinformation.net/#3rdparty
Jack
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| nomail-nospam@no.org 2008-01-29, 4:33 am |
| Mark Hewitt wrote:
> <nomail-nospam@no.org> wrote in message news:fnebin$65f$1@ai
oe.org...
>
> Slaved on north doesn't mean anything to me.
> Why not try looking at the software I suggested and if that isn't what you
> mean say what it is you do mean.
I mean like a slaved gyro, you turn the display and the map
doesn't turn, north is always north. It should be possible
with a digital compass so long as the display is at least
a few degrees off vertical. I can do it on a laptop with
the gimp feeding and turning map sections on the basis of
artificial data but not how to get an an actual compass signal
sensed and processed.
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| Pieter 2008-01-29, 12:34 pm |
| There are plenty of "moving map" applications like, for example,
OziExplorer, but I have never heard of one that would re-orient the screen
image to keep North "up."
<nomail-nospam@no.org> wrote in message news:fnmhpk$t1b$1@ai
oe.org...
> Mark Hewitt wrote:
>
> I mean like a slaved gyro, you turn the display and the map doesn't turn,
> north is always north. It should be possible
> with a digital compass so long as the display is at least
> a few degrees off vertical. I can do it on a laptop with
> the gimp feeding and turning map sections on the basis of artificial data
> but not how to get an an actual compass signal sensed and processed.
>
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