Converting Lat/Long values into Eastings/Northings
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Posts: 46,084
To all,
I was wondering if anyone had a conversion routine or formula they would
care to share for converting lat/long values into corresponding
easting/northing values ?
Lat/Long values would be in the typical NMEA format as output from a GPS unit.
Thanks in advance,
John
I was wondering if anyone had a conversion routine or formula they would
care to share for converting lat/long values into corresponding
easting/northing values ?
Lat/Long values would be in the typical NMEA format as output from a GPS unit.
Thanks in advance,
John
Comments
bearing, course, heading ?
richard
Original Message
From: "John D. Wilkinson" <jdw@g...>
To: <basicstamps@egroups.com>
Sent: Saturday, July 01, 2000 7:30 AM
Subject: [noparse][[/noparse]basicstamps] Converting Lat/Long values into Eastings/Northings
> To all,
> I was wondering if anyone had a conversion routine or formula they would
> care to share for converting lat/long values into corresponding
> easting/northing values ?
>
> Lat/Long values would be in the typical NMEA format as output from a GPS
unit.
>
> Thanks in advance,
> John
>
>
>
>
>
>I was wondering if anyone had a conversion routine or formula they would
>care to share for converting lat/long values into corresponding
>easting/northing values ?
>Lat/Long values would be in the typical NMEA format as output from a GPS
unit.
I hope you are not thinking of doing this with a Stamp. The conversion is
discussed in depth in the book Map Projections - A Working Manual by the
late John P. Snyder. This book is the US Geological Survey Professional
Paper 1395. Searching on the net should find the USGS location where the
paper can be found.
I wrote a conversion routine to convert from Lat/Long to UTM (your Northing
and Easting) quite some years ago using this manual. The code ran some 250
lines and contained huge amounts of floating point math. I do not have the
code as it belonged to a company I worked for.
I hope this helps.
Vic
_____________________________________________________
Victor Fraenckel - The Windman vfraenc1@n...
Home of the WindReader Electronic Theodolite
Read the WIND
The UTM system divides the earth into 60 zones each 6 degrees of longitude
wide. These zones define the reference point for UTM grid coordinates
within the zone. UTM zones extend from a latitude of 80° S to 84° N.
UTM zones are numbered 1 through 60, starting at the international date
line, longitude 180°, and proceeding east. Zone 1 extends from 180° W to
174° W and is centered on 177° W.
Each zone is divided into horizontal bands spanning 8 degrees of latitude.
These bands are lettered, south to north, beginning at 80° S with the
letter C and ending with the letter X at 84° N. The letters I and O are
skipped to avoid confusion with the numbers one and zero. The band lettered
X spans 12° of latitude.
A square grid is superimposed on each zone. It's aligned so that vertical
grid lines are parallel to the center of the zone, called the central meridian.
UTM grid coordinates are expressed as a distance in meters to the east,
referred to as the "easting", and a distance in meters to the north,
referred to as the "northing".
John
At 12:53 PM 7/1/2000 -0500, you wrote:
>I am pretty good with conversions but I dont know what northing refers to
>bearing, course, heading ?
>
>richard
>
>
>
Original Message
>From: "John D. Wilkinson" <jdw@g...>
>To: <basicstamps@egroups.com>
>Sent: Saturday, July 01, 2000 7:30 AM
>Subject: [noparse][[/noparse]basicstamps] Converting Lat/Long values into Eastings/Northings
>
>
> > To all,
> > I was wondering if anyone had a conversion routine or formula they would
> > care to share for converting lat/long values into corresponding
> > easting/northing values ?
> >
> > Lat/Long values would be in the typical NMEA format as output from a GPS
>unit.
> >
> > Thanks in advance,
> > John
> >
> >
> >
> >
> >
>
I need this conversion routine for post-processing the NEMA output on a PC.
Thanks for your input. I'll try your suggestion.
John
At 07:25 AM 7/2/2000 -0400, you wrote:
>John Wilkinson wrote:
> >I was wondering if anyone had a conversion routine or formula they would
> >care to share for converting lat/long values into corresponding
> >easting/northing values ?
> >Lat/Long values would be in the typical NMEA format as output from a GPS
>unit.
>
>I hope you are not thinking of doing this with a Stamp. The conversion is
>discussed in depth in the book Map Projections - A Working Manual by the
>late John P. Snyder. This book is the US Geological Survey Professional
>Paper 1395. Searching on the net should find the USGS location where the
>paper can be found.
>
>I wrote a conversion routine to convert from Lat/Long to UTM (your Northing
>and Easting) quite some years ago using this manual. The code ran some 250
>lines and contained huge amounts of floating point math. I do not have the
>code as it belonged to a company I worked for.
>
>I hope this helps.
>
>Vic
>_____________________________________________________
>
>Victor Fraenckel - The Windman vfraenc1@n...
> Home of the WindReader Electronic Theodolite
> Read the WIND
>
>
>
>