GIS Data Portal

As a regional site with a well-developed social science dimension within the LTER Network, Coweeta has significant GIS data holdings. While we cannot place all of our data on-line due to either distribution restrictions or resource constraints, we do make available a significant amount of reference data. At present, data in GIS format derived from Coweeta LTER research activities ("research data") as well as that derived from other sources ("reference data") are both available through this portal.

                                                                                                             REFERENCE DATA

Coweeta Basin

These data were either commissioned or produced by the USDA Forest Service Coweeta Hydrologic Laboratory or the Coweeta LTER starting in the late 1980s.   

Raster Data -- includes a DEM and a hillshade.                                                                                                                                                                                       

Aerial Photography -- we serve DOQQs for the Coweeta Basin.

Digital Raster Graphics -- includes the USGS Topo Quad the USDA Forest Service Map of the Basin.                                                                                   

Vector Data -- consists of weirs, streams, roads, and the Coweeta Basin with watersheds, using the USDA Forest Service Map as the source.

Southern Appalachia

These data were produced by the U.S. Geologic Survey, the U.S. Census Bureau, and other sources as noted.

U.S. Census Bureau Tiger Data -- provides good resolution for county boundaries, road networks and basic coverage of stream networks, as well as the boundaries for census blocks and block groups.

Digital Raster Graphics -- – includes the 1:250,000, 1:100,000 and 1:24,000 scale DRGs. The 1:24,000 scale DRGS have been decollared to so the images can be easily mosaicked, and are served by state, UTM zone, in groups according to letters of the alphabet (A-J, K-N, etc.). Each DRG packet is 150 MB or larger so be aware of the limitations of your connection. To locate your DRG, please use the DRG Index.

Historic County Boundaries -- excerpted from the Historical County Boundary Files. They provide estimated historic boundaries for the Coweeta study area going back to 1790. Although restricted to the Coweeta Project Area, these data complement the Coweeta Project Area data in the Ecotrends Socioeconomic Catalog.

Historic Landcover Data -- Landcover classification for the Sourthern Applachians region, derived from satellite imagery, digital elevation models (DEMs), DEM slope calculations, and 2006 NAPP DOQQs. Classified using National Land Cover Database (NLCD) classifications. Project report by Jeff Hepinstall-Cymerman.

Riparian Buffer Classifications for the Upper Little Tennessee River watershed -- This data set includes riparian buffer classifications for streams in the Upper Little Tennessee River Watershed and includes streams outside the Nantahala National Forest that were mapped by the NC Stream Mapping Program (NCSMP) that have been corrected based on their presence or absence as observed in 2006 aerial imagery.

                                                                                                            RESEARCH DATA

Land Change Trajectories across Four Watersheds in the Upper Little Tennessee River Basin

These data were collected to reconstruct spatially explicit land use/land cover change trajectories that were temporally consistent and at very high accuracies for a selection of watersheds in Macon County, NC: Cartoogechaye, Coweeta, Skeenah and Watauga. Buildings (points) and roads (lines) were digitized from historic maps and aerial photographs and aligned where necessary for temporal consistency. Land cover was simultaneously classified across all years for each 25x25m pixel (1/16 ha) in order to maximize temporal consistency.

Vector Data -- includes roads, historic buildings, watershed boundaries and stream networks from 1906 through 2003.

Raster Data -- includes a 10m DEM and land cover classifications for each watershed from 1942 through 2006.

The Coweeta LTER Synoptic Sampling Program

Coweeta LTER researchers sampled fifty-eight stream sites in the Upper Little Tennessee River Basin in February and June of 2009. Sites were selected to represent the range of land cover and land use within the basin. Samples were taken over three days of stable weather and discharge during periods of baseflow. They were used to characterize conditions across the basin during the growing and the non-growing seasons without the influence of elevated discharge. The GIS data presented was used to both help in selecting the 58 sites as well as to support the research that used the sample data as outlined in the Coweeta VI renewal proposal.

Vector Data -- includes watershed boundaries, sample site locations, and materials on land use derived from land ownership parcel records and road networks.

Raster Data -- includes land cover data and the necessary ingredients for watershed modeling (DEMs, slope and flow models, etc.).

The Coweeta LTER Hillslope Study

The Hillslope Study sites represent a gradient of lanscapes, including forested, valley agriculture, and mountain housing developments. These locations and plots were used to collect samples of various matrices for numerous analyses at differing intervals.

Coweeta LTER Environmental Sensor Station Network

A network of more than 60 environmental sensor stations have been installed at locations throughout both the Coweeta Hydrologic Laboratory, western North Carolina, and Georgia. The stations provide long-term monitoring of various environmental parameters and are the source data for the Coweeta LTER Streaming Data Portal.

Vector Data -- includes sensor station ids, coordinates, elevations, and general site descriptions.