-------- Original Message --------
Subject: Re: Electronic map data and GPS: Mohave Desert]
Date: Thu, 3 Feb 2005 13:40:36 -0800
From: Jeffrey Johnson <[log in to unmask]>
Reply-To: Jeffrey Johnson <[log in to unmask]>
To: Maps and Air Photo Systems Forum <[log in to unmask]>
References: <[log in to unmask]>

------------------
I cant imagine he hasn't seen

http://www.mojavedata.gov/

But if not, there it is.




On Thu, 3 Feb 2005 15:35:17 -0500, Johnnie D. Sutherland
<[log in to unmask]> wrote:
> -------- Original Message --------
> Subject: Electronic map data and GPS: Mohave Desert
> Date: Thu, 3 Feb 2005 08:25:20 -0700
> From: Ken Rockwell <[log in to unmask]>
> To: Maps and Air Photo Systems Forum <[log in to unmask]>
>
> ------------------
> A student e-mailed this reference question to me.  It's an area with
> which I've had no experience, so I wonder if others out there can advise
> us on resources that may help.  Thanks in advance,
>
> Ken Rockwell
> Univ. of Utah
>
> I wanted to ask you about finding electronic map data needed for my
> senior project in computer science. To give you a bit of background, I'm
> working with three other people in a group project involved with a local
> company that's trying to enter the DARPA sponsored Grand Challenge event
> this October. The event is an autonomous vehicle race (meaning there's
> no direct human control over the vehicle) from Barstow, CA to Primm, NV.
> Our project is to take signal input from a GPS module and correct for
> possible errors in the latitude/longitude based on map data. By that I
> mean that the vehicle is following only roads and the GPS signal may
> indicate that it's some 10 meters (say) off the road. Our software has
> to "filter" the signals by finding the closest road in a straight line
> based on map data, give new latitude/longitude coordinates correcting
> for the nearest road, then recombine that with the rest of the GPS
> signal (which gives current time, altitude, etc.) to be used by the
> vehicle's navigation system.
>         I'm not sure about sources of electronic map data for the area
> in question: that is what format they're available in (vector or
> raster), how up-to-date, and what resolution or level of detail they
> have. I'm looking for either free or commercial sources of
> maps--basically I just need to know what's available and where to get
> it.
>
> I'm trying to locate helper software to "read" the map given numeric
> latitude/longitude coordinates. I know there are a lot of companies
> selling such software--basically the program I'm trying to write
> presumably recreates what any high-end GPS receiver would already do for
> you. The issue is the helper software I find has to be able to
> understand the map data given to it. Do you happen to know of any
> resources for finding such information?
>