Global Mapper Pro

Easting/Northing projection entry

TadRobinTadRobin Global Mapper UserTrusted User Posts: 22
edited February 2014 in Projection Questions
I am trying to enter points onto my Alaska Map that is set in projection;

UTM
DATUM: NAD27
UNIT: feet
UTM ZONE: 4 (162°W - 156°W - Northern Hemisphere)

I want to add points using a Easting and Northing format (not lat/long), the points I am trying to add are formatted like this;

Easting 523641.5
Northing 6853354

I have tried using the tool "Coordinate Conversion" but when I hit the "Convert to" button the Lat/Long comes back wrong;

162° 13' 48.5271" W
18° 51' 55.1897" N

Here is a screen shot;

IMG_9736.jpg

Am I in error on the input or output coordinates??

Thanks,

Tad

Comments

  • JeffH@BMGJeffH@BMG Global Mapper Developer Trusted User Posts: 338
    edited February 2014
    Hi Tad, at a guess, you have your Northings and Eastings reversed.

    Hope that this helps,

    ~Jeff
  • MykleMykle Global Mapper User Trusted User Posts: 452
    edited February 2014
    Tad,

    Your input coordinates are fine.
    Your units are probably meters, not feet.

    I get good coordinates along Getmuna Creek when using meters,
    and I get your not-so-good coordinates when using feet.

    Mykle
  • TadRobinTadRobin Global Mapper User Trusted User Posts: 22
    edited February 2014
    Hi Jeff, no that was one of the first things I tried.
  • TadRobinTadRobin Global Mapper User Trusted User Posts: 22
    edited February 2014
    OK Mykle, let me give it a shot.
  • TadRobinTadRobin Global Mapper User Trusted User Posts: 22
    edited February 2014
    Thanks guys, sometimes I feel so stupid...that was the fix, my bad

    Have a great day

    Tad
  • MykleMykle Global Mapper User Trusted User Posts: 452
    edited February 2014
    Tad,

    Lots of subtle stuff in this mapping business, isn't there?

    Speaking of which, depending upon what you are doing you may want to use NAD-27 (Alaska).
    I have not checked to see what the difference is for this area.
    Just use enter points for the same coordinates, but select a different input datum, then
    compare the resulting points. If there isn't much difference, that's good, otherwise it is
    just another picky detail to keep track of.

    I do a lot of work in NAD-27 Mexico, and the difference is several meters compared to plain NAD-27.

    Mykle
  • JeffH@BMGJeffH@BMG Global Mapper Developer Trusted User Posts: 338
    edited February 2014
    @Mykle: yep, you're right -- I missed the "UNIT feet" setting in the screen shot. Thanks!

    ~Jeff
  • TadRobinTadRobin Global Mapper User Trusted User Posts: 22
    edited February 2014
    Cool, will do Mykle

    T
Sign In or Register to comment.