5.0

5.0 | 1 rating Rate this file 28 Downloads (last 30 days) File Size: 3.42 KB File ID: #32907

polar stereographic coordinate transformation (map to lat/lon)

by

 

15 Sep 2011 (Updated )

Transforms map data into lat/lon coordinates for a polar stereographic map projection. NSIDC/SCAR

| Watch this File

File Information
Description

  The National Snow and Ice Data Center (NSIDC) and Scientific Committee
  on Antarctic Research (SCAR) use a version of the polar stereographic
  projection that Matlab does not have. This file does transformations to
  geographic coordinates from map coordinates to facilitate
  comparisons with other datasets.

POLARSTEREO_INV transforms map coordinates to lat/lon data for a polar stereographic system
  [LAT,LON]=POLARSTEREO_INV(X,Y,EARTHRADIUS,ECCENTRICITY,LAT_TRUE,LON_POSY)
  LAT and LON are in decimal degrees with negative numbers (-) for S and W.
  X and Y are the map coordinates (scalars, vectors, or matrices of equal size).
  EARTHRADIUS is the radius of the earth defined in the projection
      (default is 6378137.0 m, WGS84)
  ECCENTRICITY is the earth's misshapenness
      (default is 0.08181919)
  LAT_TRUE is the latitude of true scale in degrees, aka standard parallel
      (default is -70). Note that some NSIDC data use 70 and some use 71.
  LON_POSY is the meridian in degrees along the positive Y axis of the map
      (default is 0)

  Equations from: Map Projections - A Working manual - by J.P. Snyder. 1987
    See the section on Polar Stereographic, with a south polar aspect and
  known phi_c not at the pole.

  See also: POLARSTEREO_FWD

Acknowledgements

This file inspired Modis Mosaic Of Antarctica.

MATLAB release MATLAB 7.4 (R2007a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (1)
08 Mar 2013 Chad Greene

This is absolutely magnificent! Thanks for sharing!

Updates
19 Sep 2011

Note: companion file (forward transformation) hasn't been approved yet by TMW. Should come through in a couple days.

Contact us