Jump to content

 
Photo

Please help

- - - - -

  • Please log in to reply
1 reply to this topic

#1
drogers

drogers

    Newbie

  • Validated Member
  • Pip
  • 4 posts
  • No Country Selected

I have a map projection with a grid overlaid. Is there a way to determine the i,j values for a particular lat/long? The parameters I have been given for this projection are:

Global GEM on full-resolution 30 km Polar Stereographic grid specifications
ni 247
nj 200
resolution at 60° N 30 km
coordinate of first grid point 32.549° N
134.614° W
(i,j) coordinate of North Pole (88.0, 200.0)
grid orientation (with respect to j axis) -111

Would I be able to create an excel sheet that outputs i,j for an input of any lat/long?
So if my input lat/long happens to be in the center of grid point (1,1) the output would be i=1.5 j=1.5
I have attached the projection if anyone would like to take a look.
Thanks for any help!

Attached Files



#2
Hans van der Maarel

Hans van der Maarel

    CartoTalk Editor-in-Chief

  • Admin
  • PipPipPipPipPipPipPip
  • 3,887 posts
  • Gender:Male
  • Location:The Netherlands
  • Interests:Cartography, GIS, history, popular science, music.
  • Netherlands

Is it me or are questions like this popping up an awful lot lately?
Hans van der Maarel - Cartotalk Editor
Red Geographics
Email: hans@redgeographics.com / Twitter: @redgeographics




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

-->