The 25.4 km polar stereographic land masks are nearly identical to their former values as used for generating the hemispheric grib data files which are distributed operationally. There is no change at all to the polar stereographic land mask used in constructing the global ice file.
The changes are listed below. The flag values are 157 for land, 0 for ocean, and 195 for 'coast'. The southern hemisphere changes 5 flags of 122,475. The northern hemisphere changes 71 points of 179,025, mostly changing mid-latitude points from ocean to coast.
NCEP.EMC.Seaice@noaa.gov
Last Modified 12 April 2001
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| Old | New | Latitude | Longitude |
| 195 | 157 | -36.900 | -220.194 |
| 0 | 195 | -37.025 | -220.383 |
| 157 | 195 | -37.630 | -219.749 |
| 0 | 195 | -53.029 | -286.892 |
| 0 | 195 | -75.684 | -196.131 |
| Old | New | Latitude | Longitude |
| 157 | 195 | 37.652 | -76.269 |
| 0 | 195 | 28.699 | -114.434 |
| 0 | 195 | 29.865 | -112.811 |
| 0 | 195 | 30.741 | -113.213 |
| 0 | 195 | 29.686 | -115.733 |
| 0 | 195 | 42.589 | -80.000 |
| 0 | 195 | 43.372 | -77.449 |
| 0 | 195 | 33.581 | -118.055 |
| 0 | 195 | 44.387 | -83.196 |
| 0 | 195 | 45.278 | -81.187 |
| 0 | 195 | 45.693 | -81.500 |
| 0 | 195 | 47.633 | -85.679 |
| 0 | 195 | 50.021 | -61.565 |
| 0 | 195 | 43.509 | -124.397 |
| 0 | 195 | 58.367 | -78.277 |
| 0 | 195 | 60.842 | -69.150 |
| 0 | 195 | 61.150 | -69.992 |
| 0 | 195 | 62.491 | -79.502 |
| 0 | 195 | 62.830 | -74.440 |
| 0 | 195 | 62.718 | -64.745 |
| 0 | 195 | 65.232 | -83.334 |
| 0 | 195 | 66.663 | -53.699 |
| 0 | 195 | 69.064 | -94.676 |
| 0 | 195 | 69.230 | -95.489 |
| 0 | 195 | 66.301 | -120.475 |
| 0 | 195 | 74.544 | -93.601 |
| 0 | 195 | 72.942 | -111.661 |
| 0 | 195 | 74.901 | -98.726 |
| 0 | 195 | 75.692 | -80.000 |
| 0 | 195 | 43.710 | -6.809 |
| 0 | 195 | 51.967 | -5.410 |
| 0 | 195 | 58.696 | -153.217 |
| 0 | 195 | 72.942 | -21.661 |
| 0 | 195 | 50.474 | -1.976 |
| 0 | 195 | 50.604 | -0.976 |
| 0 | 195 | 58.286 | -2.995 |
| 0 | 195 | 51.170 | 2.360 |
| 0 | 195 | 54.305 | -162.781 |
| 0 | 195 | 45.640 | 13.296 |
| 0 | 195 | 60.322 | 18.781 |
| 0 | 195 | 63.642 | 178.996 |
| 0 | 195 | 64.505 | 178.056 |
| 0 | 195 | 63.370 | 21.411 |
| 0 | 195 | 81.030 | 50.601 |
| 0 | 195 | 60.574 | 21.219 |
| 0 | 195 | 69.309 | 168.819 |
| 0 | 195 | 57.908 | 24.139 |
| 0 | 195 | 52.416 | 173.266 |
| 0 | 195 | 60.796 | 32.584 |
| 0 | 195 | 59.224 | 164.822 |
| 0 | 195 | 56.607 | 163.435 |
| 0 | 195 | 73.008 | 73.800 |
| 0 | 195 | 55.697 | 162.021 |
| 0 | 195 | 69.135 | 66.310 |
| 0 | 195 | 44.488 | 37.867 |
| 0 | 195 | 45.573 | 48.006 |
| 0 | 195 | 46.292 | 52.847 |
| 0 | 195 | 45.514 | 51.832 |
| 0 | 195 | 43.983 | 50.726 |
| 0 | 195 | 44.392 | 145.205 |
| 0 | 195 | 39.415 | 49.508 |
| 0 | 195 | 42.044 | 53.641 |
| 0 | 195 | 55.244 | 109.398 |
| 0 | 195 | 46.023 | 59.923 |
| 0 | 195 | 39.852 | 139.638 |
| 0 | 195 | 42.172 | 130.633 |
| 0 | 195 | 42.477 | 76.911 |
| 0 | 195 | 34.131 | 132.347 |
| 0 | 195 | 32.610 | 133.071 |
| 0 | 195 | 33.611 | 129.830 |
| 0 | 195 | 31.316 | 130.069 |