MATLAB Central Newsreader - Converting UTM to Geo-coordinate

Converting UTM to Geo-coordinate

Pete sherer — Tue, 12 Feb 2008 18:44:02 -0500

I am looking for a way to convert the UTM to
geo-coordinates. Are there any existing functions to do
such task? Thank you for your suggestion.

SH

Re: Converting UTM to Geo-coordinate

Pete sherer — Tue, 12 Feb 2008 23:24:01 -0500

"Pete sherer" <tsh@abg.com> wrote in message
<fospdi$bff$1@fred.mathworks.com>...
> I am looking for a way to convert the UTM to
> geo-coordinates. Are there any existing functions to do
> such task? Thank you for your suggestion.
>
> SH

If I tried using the UTM2DEG.m file, it looks like I need to
know the right UTMzone. Are there anyway to know it
automatically? For example, the
Lat=6597500;
Lon=348100;

By changing the zone, I receive the following Lat/Lon
UTMZone: 17 J; Lat= -30.7457, Lon= -82.5868
UTMZone: 18 J; Lat= -30.7457, Lon= -76.5868
UTMZone: 19 J; Lat= -30.7457, Lon= -70.5868
UTMZone: 20 J; Lat= -30.7457, Lon= -64.5868
UTMZone: 21 J; Lat= -30.7457, Lon= -58.5868
UTMZone: 22 J; Lat= -30.7457, Lon= -52.5868
UTMZone: 23 J; Lat= -30.7457, Lon= -46.5868
UTMZone: 24 J; Lat= -30.7457, Lon= -40.5868

I would appreciate your suggestions

Re: Converting UTM to Geo-coordinate

rodney.thomson@gmail.com — Wed, 13 Feb 2008 00:15:43 -0500

On Feb 13, 8:24 am, "Pete sherer" <t...@abg.com> wrote:
> "Pete sherer" <t...@abg.com> wrote in message
>
> <fospdi$bf...@fred.mathworks.com>...
>
> > I am looking for a way to convert the UTM to
> > geo-coordinates. Are there any existing functions to do
> > such task? Thank you for your suggestion.
>
> > SH
>
> If I tried using the UTM2DEG.m file, it looks like I need to
> know the right UTMzone. Are there anyway to know it
> automatically? For example, the
> Lat=6597500;
> Lon=348100;
>
> By changing the zone, I receive the following Lat/Lon
> UTMZone: 17 J; Lat= -30.7457, Lon= -82.5868
> UTMZone: 18 J; Lat= -30.7457, Lon= -76.5868
> UTMZone: 19 J; Lat= -30.7457, Lon= -70.5868
> UTMZone: 20 J; Lat= -30.7457, Lon= -64.5868
> UTMZone: 21 J; Lat= -30.7457, Lon= -58.5868
> UTMZone: 22 J; Lat= -30.7457, Lon= -52.5868
> UTMZone: 23 J; Lat= -30.7457, Lon= -46.5868
> UTMZone: 24 J; Lat= -30.7457, Lon= -40.5868
>
> I would appreciate your suggestions

UTM positions require 4 fields of information to be converted to a
distinct latitude and longitude
- eastings (x)
- northings (y)
- zone
- hemisphere

Each of things can be derived from a single lat/long value.

You see, UTM coordinates describe a 6 degree slice of the Earth in
either the norther or southern hemisphere. So an Easting/Northing
pair, there are 120 possible positions that relate to those values.
you must know the zone and hemisphere.