Description about "gt.gif"
| file title | : AARS Asia 30-second ground truth | |
| variables | : land cover classes | |
| data type | : gif format from one byte binary raster | |
| columns | : 20,400 | |
| rows | : 12,600 | |
| geographic reference | : latitude / longitude | |
| geographic coverage | : Asia | |
| latitude of the north end | : + 90 degrees (North) | |
| latitude of the south end | : - 15 degrees (South) | |
| longitude of the east end | : - 165 degrees (West) | |
| longitude of the west end | : + 25 degrees (East) | |
| grid size | : 30 second | |
| position of the center of the first (upper left corner) pixel | ||
| : 25 deg 0 min 15 sec east longitude, 89 deg 59 min 45 sec north latitude | ||
| position of the center of the last (lower right corner) pixel | ||
| : 165 deg 0 min 15 sec west longitude, 14 deg 59 min 45 sec south latitude | ||
| maximum position error | ||
| : within 0.5 pixel (15 second) compared with the Digital Chart of | ||
| the World (DCW) for land area | ||
| minimum value | : 10 | |
| maximum value | : 255 | |
| existing values | : 10, 14, 16, 18, 24, 36, 44, 60, 70, 72, 74, 76, 78, 90, 94, 110, 120, 130, | |
| 132, 140, 141, 142, 160, 174,182,184, 190, 191, 192, 193, 194, 200, 210, | ||
| 220, 222, 224, 226, 255 | ||
| value units | : characteristic classes | |
| Legend : | ||
| 10 - 226 | : land cover class code based on AARS land cover classification system | |
| 255 | : background value | |