LAYERS:

Place Names

Vector points, originated from existing sources and from USGS Topographic map, 1:24,000, USGS-National Wetlands Research Center (NWRC)

Roads

Vector line, Digital Line Graphics, 1:100,000 , USGS

Hydrology

State Line

Vector line, digitized from USGS Topographic map 1:24,000, NWRC

Special Biological Areas

Vector polygon, digitized on screen based on information provided by local citizens, local organizations, universities, state and federal agencies. Data was obtained from written documents and oral reports. Scale 1:24,000, Texas General Land Office (TGLO)

Special Cultural Areas

Vector polygon, digitized on screen based on information provided by local archeological and historical experts. Scale 1:24,000, NWRC-Caddo Lake Institute.

Original Ramsar Wetland Designation (1993):

-State Park-Wildlife Management Areas (WMA)

Vector polygon, scale 1:24,000, data from Texas Parks & Wildlife Department (TPWD), GIS Laboratory

Ramsar Nomination for Addition (96-97):,

-TPWD Mossy Break Wetlands

Vector polygon, scale 1:24,000, data from Texas Parks & Wildlife Department (TPWD), GIS Laboratory

-Harrison Bayou/Starr Ranch Lease

Vector polygon, scale 1:24,000, data approximating the Longhorn Ammunition Plant Boundary. Digitized on screen (aerial photographs) based on local citizens information. NWRC-Caddo Lake Institute

-TGLO's Marion County Corridor

Vector polygon, scale 1:24,000, data from Texas General Land Office (TGLO)

-TGLO's Jackson's Arm Parcel

-TGLO's Big Green Brake Parcel

-Jones Family/Henley Parcels

Vector polygon, scale 1:24,000, data approximating the legal property boundaries, Caddo lake Institute

-TGLO's Submerged Mineral Acreage

Vector polygon, scale 1:24,000, digitized from NWI-water boundaries and satellite imagery, NWRC

-Caddo Lake State Park

Vector polygon, scale 1:24,000, data from Texas Parks & Wildlife Department (TPWD), GIS Laboratory

Main Channel

Vector lines and points, scale 1:24,000, originated from existing sources and local citizens information, NWRC-Caddo Lake Institute

Channel Markers

Boat Roads

Landmarks/Businesses

BACKDROP IMAGE:

CIR PHOTOS (1995)

Cir.met

DIGITAL RASTER GRAPHIC (DRG)

Drg.met

LAND COVER / LAND USE

Gap.met

B&W PHOTOS (1949

Hist.met