Easting/Northing projection entry

TadRobinTadRobin Global Mapper UserPosts: 22Trusted User
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 Posts: 322Trusted User
    edited February 2014
    Hi Tad, at a guess, you have your Northings and Eastings reversed.

    Hope that this helps,

    ~Jeff
  • MykleMykle Global Mapper User Posts: 443Trusted User
    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 Posts: 22Trusted User
    edited February 2014
    Hi Jeff, no that was one of the first things I tried.
  • TadRobinTadRobin Global Mapper User Posts: 22Trusted User
    edited February 2014
    OK Mykle, let me give it a shot.
  • TadRobinTadRobin Global Mapper User Posts: 22Trusted User
    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 Posts: 443Trusted User
    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 Posts: 322Trusted User
    edited February 2014
    @Mykle: yep, you're right -- I missed the "UNIT feet" setting in the screen shot. Thanks!

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

    T
Sign In or Register to comment.