What data is currently available on S and T?

What do we have on the TDEC GIS Server (the S and T drives) as of December 6, 2007?

First, a good way to understand the difference between S: and T: is to know that 'S' is short for statewide data. The S: drive is a repository for basemap data like aerial photos, roads, streams, USGS topos, national elevation data, county and city boundaries, and so forth.

The T: drive, with 'T' being short for 'TDEC', is the place where different Divisions can store and share data that have been generated in-house. So the T: drive might have impaired streams published by Water Pollution Control, trails and park boundaries published by Parks, and so-on. To get data posted on T: you should create metadata and then put files in the 'New Data' folder. Let Gayle know you put the data there and she'll work with you to get it posted in a more suitable location on T:.

Always, check the metadata to ensure data you decide to use is suitable for your task. Some data may be old and need updating.

With the overall difference between S: and T: in mind, here's a quick rundown of the main data layers on S: (Look for a T: Drive layer listing in the future as the Divisons add more data.)

Admin

Admin contains boundaries like counties, states, political districts, Field Office boundaries, Natural Area and State Park boundaries, and pipelines and powerlines.

Imagery

Aerial Photos 406:

NAIP_2004: 2004 COLOR Aerial Photos for 21 TN counties from the USDA National Ag Inventory Program, 1-2 meter resolution, UTM NAD83

NAIP_2006: 2006 COLOR Aerial Photos for MOST TN counties from the USDA National Ag Inventory Program, 1 FOOT resolution, UTM NAD83

HSUC_2005: 2005 Hi-Res Black and White and Color Aerial Photos for Upper Cumberland Plateau Counties, TN State Plane

DOQ_DD_1997-1999: Black and White Aerial Photos, USGS?, Statewide, Decimal Degrees

COUNTY_UTM_1997-1999: 1 Meter Black and White Aerial Photos from NRCS, Statewide, UTM NAD83

Upper Cumberland: 2005 Color and Black and White Aerial Photos for the Upper Cumberland Region

Land

caves: limited coverage of caves in TN, DD

physprov: TN physiographic provinces, DD

sp nat pub 0708: TN natural areas and state parks with public access as of 07/08, TN State Plane

Ecoregions: USEPA Ecoregions for Tennessee and surrounding states, DD

lulc_25: 1997 land use land cover imagery for Tennessee from TWRA, 25 meter pixel resolution, TN State Plane

lulc_100: 1997 land use land cover imagery for Tennessee from TWRA, 100 meter pixel resolution, TN State Plane

mrlc_2001: 2001 land use land cover imagery for Tennesee from USGS, 30 meter pixel resolution, TN State Plane

NED: USGS National Elevational Dataset digital elevation models by USGS 8-digit HUC (watershed), 30 meter pixel resolution, TN State Plane

NRCS Soils: Low Resolution Statsgo Soils for Tennessee, Statewide, TN State Plane

TeleAtlas Month-Year (currently 0707):

Statewide: Statewide layers for airports, bus stations, cemeteries, census boundaries, city boundaries, county boundaries, highways, hwy signs, institutions, interstate exits, landmarks, malls, parks, population, railroads, rec areas, streets, waterbodies, zipcodes, TN State Plane

County: Same as above by county.

TN Base Mapping Products:

2004?, 2005? Data for most TN counties (TN State Plane) including: 1 meter black and white aerial photos, Parcels, Soils, roads from TDOT, administrative boundaries, hydrography, political districts, tree cover

Topographic Maps: 1:24000, 1:100000, 1:250000 Scale USGS Topographic Maps (digital raster graphics), by quadrangle, TN State Plane

NOTE: for statewide use, an image catalog is available that will let you load whatever quadrangles are in your viewframe--contact me if you need the file.

Water (for help contact Rich Cochran):

NHD: National Hydrography Dataset, 1:100,000 Scale Streams and Lakes with hydrologic connectivity, DD (special extensions may be needed for full functionality)

NHD HighRes: National Hydrography Dataset, 1:24,000 Scale Streams and Lakes with hydrologic connectivity, DD (special extensions may be needed for full functionality)

Major Rivers: 1:250,000 Scale, DD

Major Lakes: 1:250,000 Scale, DD

Reach 1: 1:250,000 Scale Streams from EPA, DD

tn annual precip line: 1998 lines showing avg. annual rainfall, DD, Univ. of Oregon, PRISM data

tn annual precip poly: 1998 polygons showing avg. annual rainfall, DD, Univ. of Oregon, PRISM data

TN_HUC8_boundaries: Watersheds by USGS 8 digit huc code, DD

TN_HUC12_boundaries: Watersheds by USGS 12 digit huc code, DD

tn_huc_12: probably same as above

HUC8: probably same as above

NWI: National Wetlands Inventory Data for US Fish and Wildlife Service, preliminary indicator of wetlands by quadrangle, 1970s-early 1990s, DD (contact me for a statewide ArcView 3.x tool to display all quads in view)

There are probably some errors in my descriptions, but my hope is that this is helpful in determining what data is available. Please post/respond if you notice inaccuracies.

Silas