| LAYER DESCRIPTION: | GRID NAME: |
| Acidrain | ACIDRAIN |
| Albacore Dstrbtn, Spwnng, & Fshrs | ALBACORE, |
| Albacore Migration | ALBA_MIG |
| Albedo, Srfc-Jan, Apr, Jul, & Oct | ALB_JAN, ALB_APR, etc. |
| Aspect | ASPECT |
| Basins, Watershed | BS_AFRICA, BS_ASIA, etc. |
| Bathymetry | BATHYM |
| Biomass Prdctvty; High, Med.,&Low | ECOS_HI, _MED, & _LO |
| Bluefin Dstrbtn, Spwnng, & Fshrs | BLUEFIN |
| Bluefin Migration | BLUE_MIG |
| Bovines/sq Km | BOVINES |
| Buffalo/sq Km | BUFFALO |
| Camels/sq Km | CAMELS |
| Caribou/sq Km | CARIBOU |
| Cattle/sq Km | CATTLE |
| Clould Cover %, 12 Months of | CLD01JAN, CLD02FEB, etc. |
| Continental Shelves | CONT_SHF |
| Continents | CONTINNT |
| Coral Reef Distribution | CORAL |
| Cover, Sec.& Prim./Veg. Types | COV_PRIM, COV_SEC |
| Cultivation, Intensity of Agrctltrl | CULT_IN |
| Dairy Cattle/sq Km | DAIRY |
| Deserts, Spreading | DESERTS |
| Drinking Water Access in % Pop. | DRINKH2O |
| Earth-Shaded Image | EARTH |
| Ecosystem Complexes, Major World | ECOSYS |
| Fisheries Areas, Major World | FISH_FAO |
| Fisheries Productivity by Major Areas | FISH_CAT |
| Fog, Areas of Frequent | FOG |
| Food (Daily Caloric Intake/Person) | FOOD |
| GNP (Gross National Product) | GNP |
| Goats/sq Km | GOATS |
| Greenturtle Distribution | GREENTUR |
| Horses/sq Km | HORSES |
| Iceberg Drifts | ICEBERG |
| Land & Aspect Colored by Wtrshd | SHED_ASP |
| Land Cover Data, Reliability of | COV_RELB |
| Land, Detailed Definition of | LAND_DET |
| Land Masses | LAND |
| Land with Aspect Shading | LAND_ASP |
| Manatee and Dugon Distribution | MANATEE |
| Marine Conservation Projects | O_CONSRV |
| Marlin-Dstrbtn, Spwnng & Fshrs | MARLIN |
| Marlin Migration | MARL_MIG |
| Methane Production/sq Km | METHANE |
| Mountain Ranges of the World | MOUNTS |
| Nations (2'24"& 4'48" Resolutions) | NATIONS & NATIONS_ |
| Ocean Bio-Geographic Zones | O_BIOGG |
| Ocean Floor Biomass Production | O_BOTBIO |
| Otters, General Range of Marine | O_OTTER |
| Ocean Productivity | O_PRODT |
| Ocean Zones, Biological | O_BIOZON |
| Phytoplankton Productivity | PHYTOPLN |
| Pigs/sq Km | PIGS |
| Population per Physician | POP_DOC |
| Precipitation, 12 Monthly Files of | PRE01JAN, PRE02FEB, etc. |
| Ridge Dir. in Tens of Dgrs from Nrth. | RIDG_DIR |
| Ridges per Pixel, Number of | RIDG_NUM |
| Ridge Systems of the World, Major | RIDGES |
| Risk Areas of Casualties at Sea | RISK |
| Rivers of the World | RIVERS |
| Seasurface Tmp-5 yr ave for 12 dys/yr | SEA_T048, T076, T104, T132, T160, T188, T215, T244, T272, T300, T335, & T363 |
| Shaded Relief Map of the World | SHAD_REL |
| Sheep/sq Km | SHEEP |
| Skipjack Dstrbtn, Spwnng, and Fshrs | SKIPJACK |
| Skipjack Migration | SKIP_MIG |
| Soil Groups, Elements of Major | S_ELEMNT |
| Soil Groups, Formative Elements | S_FORM |
| Soil Map of the World | S1_MAP |
| Soil Slope Groups of the World | S1_SLP |
| Soil Texture Groups of the World | S1_TEXTR |
| Soils Data, Reliability of | S2_RELB |
| Soils for Gen. Crcltn Climate Models | S2_CLIM |
| Soils Types, Detailed | S3_TYPE |
| Temperature, 12 Monthly Files of | TMP01JAN, TMP02FEB, etc. |
| Terrain Cover Types, Prim.and Sec. | TER_PRIM & TER_SEC |
| Topographic Elevation Ranges | TOPO |
| Tropical Forest Destruction | TRFORDES |
| Tropical Storms & Cyclones | TRPSTORM |
| Urban Surface Coverage | URBAN |
| Vegetation, Natural (Pre-Agriculture) | VEG_TYPE
|
| Vegetation Production, 12 Months of | VEG_JAN,VEG_FEB, etc. |
| Vegetation Production, Normal | VEG_PROD |
| Winter Gales | WIN_GALE |
| Yellowfin Dstrbtn, Spwnng, and Fshrs | YELLOFIN |
| Yellowfin Migration | YELL_MIG |
| Zooplankton, Abundance of | ZOOPLNTN |
