The COVERAGE subdirectory is an ArcINFO workspace including coverages of: National Forests and Grasslands (NFS), State boundaries (STATES) Ecological Units (UNITS) The National Forest and Grasslands and the state boundary data sets are derived from USGS 1:2,000,000-scale digital line graph political and administrative data sets. The National Forests and Grasslands coverage includes a polygon attribute entitled REGION with a numeric value of 99 for Grasslands, and 1, 2, 8 or 9 representing the Forest Service Region which administers the Forest. The State boundaries coverage and the Ecological Units coverage include two arc attributes entitled TYPE and DESCRIPTION. The associated values are: TYPE DESCRIPTION 1 Border National border between USA and Mexico or Canada 2 Shoreline Coastline, inland waterway or island 3 State Boundary between two states 4 Domain Domain boundary 5 Division Division boundary 6 Province Province boundary 7 Section Section boundary 8 Subsection Subsection boundary The Ecological Units coverage also includes two polygon attributes entitled MUID and MAPCODE. The MUID field contains the Subsection identifier such as 212Aa or M212Cd. The MAPCODE field contains the associated Province code such as 212 or M212. Also included in this workspace is an INFO file entitled ATTRIBS which has the following structure: FIELD WDTH OPUT TYP N.DEC DEFINITION MUID 9 9 C 0 Symbol for polygons representing subsection map unit; Example: 221Hb SUBNAME 51 51 C 0 Name given the subsection map unit; Example: Eastern Coalfields DOMAIN 21 21 C 0 Name of Domain in which the subsection occurs; Example: Humid Temperate DOMSYM 9 9 C 0 Designation for Domain within which subsection occurs; Example: 200 DIVISION 23 23 C 0 Name of Division within which the subsection occurs; Example: Hot Continental Division DIVSYM 8 8 C 0 Designation for Division within which the subsection occurs; Example: 220 PROVINCE 61 61 C 0 Name given to Province within which the subsection occurs; Example: Eastern Broadleaf Forest (Oceanic) PROSYM 10 10 C 0 Designation for Province within which the subsection occurs; Example: 221 SECTION 57 57 C 0 Name of Section within which the subsection occurs; Example: Northern Cumberland Plateau SECSYM 10 10 C 0 Designation for Section within which the subsection occurs; Example 221H LANDFORM 60 60 C 0 Classification and general description of landforms occuring in a subsection; Example: Low and high mountains ELEVLOW 8 20 F 5 Minimum elevation in feet associated with landforms within the subsection. ELEVHIGH 8 20 F 5 Maximum elevation in feet associated with landforms within the subsection. AVERELEV 8 20 F 5 Average elevation in feet associated with landforms within the subsection. GEOLOGY1 74 74 C 0 Name of most dominant, quaternary geology occuring within the subsection; Example: cherty-sandy-silty clay decomposition residium GEOLOGY2 74 74 C 0 Name of second most dominant, quaternary geology occuring within the subsection; Example: cherty-sandy-silty clay decomposition residium GEOLOGY3 74 74 C 0 Name of third most dominant, quaternary geology occuring within the subsection; Example: cherty-sandy-silty clay decomposition residium GEOLOGY4 74 74 C 0 Name of fourth most dominant, quaternary geology occuring within the subsection; Example: cherty-sandy-silty clay decomposition residium GEOAGE1 43 43 C 0 Geologic age of the most dominent quaternary geology from Quaternary Geologic Atlas of the United States GEOAGE2 43 43 C 0 Geologic age of the second most dominent quaternary geology from Quaternary Geologic Atlas of the United States GEOAGE3 43 43 C 0 Geologic age of the third most dominent quaternary geology from Quaternary Geologic Atlas of the United States GEOAGE4 43 43 C 0 Geologic age of the fourth most dominent quaternary geology from Quaternary Geologic Atlas of the United States SGGROUP1 35 35 C 0 Most dominent soil taxa occuring within subsection; Example: Dystrochrepts, Eutrochrepts SGGROUP2 35 35 C 0 Second most dominent soil taxa occuring within subsection; Example: Dystrochrepts, Eutrochrepts SGGROUP3 35 35 C 0 Third most dominent soil taxa occuring within subsection; Example: Dystrochrepts, Eutrochrepts SGGROUP4 35 35 C 0 Fourth most dominent soil taxa occuring within subsection; Example: Dystrochrepts, Eutrochrepts TEMPCLAS 37 37 C 0 Soil temperature class of dominant soil taxa occuring within the subsection; Example: mesic MOISCLAS 27 27 C 0 Soil moisture class of dominant soil taxa within the subsection; Example: Udic AVPRECIP 8 20 F 5 Average precipitation in inches within the subsection. AATEMP 8 20 F 5 Average temperature in degrees F within the subsection. AAPRECIP 8 20 F 5 Average length of growing season in days. POTFAUN 162 162 C 0 Reference of potential fauna DOMVEG1 90 90 C 0 Dominant alliances that represent potential vegetation occuring within the subsection; Example: Shortleaf Pine - Pitch Pine - Chestnut Oak WA DOMVEG2 90 90 C 0 Second most dominant alliances that represent potential vegetation occuring within the subsection; Example: Eastern Red Cedar - Pignut Hickory WA DOMVEG3 90 90 C 0 Third most dominant alliances that represent potential vegetation occuring within the subsection; Example: Eastern Red Cedar - Pignut Hickory WA SURFWATR 77 77 C 0 Description of size and abundance and type of streams, rivers and lakes occuring within the subsection; Example: Common perennial streams, few medium rivers HUMANUSE 47 47 C 0 General land use within the subsection; Example: Urban MLRA_1 9 9 C 0 Most dominant Major Land Resource Area within the subsection as identified in current STATSGO data MLRA_2 9 9 C 0 Second most dominant Major Land Resource Area within the subsection as identified in current STATSGO data MLRA_3 9 9 C 0 Third most dominant Major Land Resource Area within the subsection as identified in current STATSGO data EPAECO1 8 20 F 5 Most dominant EPA ecoregion within the subsection EPAECO2 8 20 F 5 Second most dominant EPA ecoregion within the subsection EPAECO3 8 20 F 5 Third most dominant EPA ecoregion within the subsection