1999 Gulf Islands National Seashore Habitat Data

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey, National Wetlands Research Center

Publication_Date: 19990101

Title: 1999 Gulf Islands National Seashore Habitat Data

Geospatial_Data_Presentation_Form: Digital vector data

Description:

Abstract:

This data set consists of digital data describing wetland and upland habitats for the Gulf Islands National Seashore off coastal Mississippi, in 1999. The data set includes 5 3.75 quarter quadrangles; some quarter quadrangles have associated linear files. Wetlands were classified on the NWI maps using the Cowardin, et al., wetland classification scheme to the level of salinity modifiers.

Purpose:

The intended use of this data set is to provide historical information for comparison to monitor wetland trends over time.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1999

Currentness_Reference: Ground Condition during source photography acquisition.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -89.250

East_Bounding_Coordinate: -88.750

North_Bounding_Coordinate: 30.250

South_Bounding_Coordinate: 30.125

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: wetlands

Theme_Keyword: hydrologic

Theme_Keyword: land cover

Theme_Keyword: surface and manmade features

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Cat Island

Place_Keyword: Dog Keys Pass

Place_Keyword: Isle Au Pitre

Place_Keyword: Ship Island

Place_Keyword: Gulf Islands National Seashore

Place_Keyword: Mississippi Sound

Place_Keyword: USA

Place_Keyword: MS

Place_Keyword: Mississippi

Place_Keyword: Mississippi Coast

Place_Keyword: Gulf of Mexico

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 1999

Access_Constraints:

It is strongly recommended that this data is directly acquired from the distributor described above or from another USGS Biological Resources Division server and not indirectly through other sources which may have changed the data in some way. The distributor makes no claims as to the data's suitability for other purposes.

Use_Constraints:

Acknowledgement of the U.S. Geological Survey, National Wetlands Research Center as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from these data would also be appreciated by U.S. Geological Survey, National Wetlands Research Center staff. Users should be aware that comparison with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in mapping conventions, data collection, and computer processes over time. The distributor shall not be liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. These data are not legal documents and are not to be used as such.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, National Wetlands Research Center

Contact_Person: Larry Handle

Contact_Position: Geographer

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 700 Cajundome Blvd

City: Lafayette

State_or_Province: LA

Postal_Code: 70506

Country: USA

Contact_Voice_Telephone: 337-266-8691

Data_Set_Credit: None

Native_Data_Set_Environment: ARC/INFO 8+

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attribute accuarcy is tested by manual comparison of the source with hard copy printouts and/or symbolized display of the digital wetlands data on an interactive computer graphic system.

Logical_Consistency_Report:

Polygons intersecting the neatline are closed along the border. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment. The neatline is generated by connecting the four corners of the digital file, as established during intialization of the digital file. All data crossing the neatline are clipped to the neatline and data within a specified tolerance of the neatline are snapped to the neatline.

Completeness_Report:

All photo-interpretable wetlands are identified and mapped using standard methodologies and equipment for the photo interpretation phases of the data development. In the upland areas, 1/4 acre wetlands generally are mapped. In coastal marsh, swamps, and bottomland hardwood areas, small open water and emergent wetlands are mapped. In general, the minimum mapping unit is from 1 to 3 acres depending of the wetland type and the scale and emulsion of the source aerial photography. Some small wetlands, densely broken marsh, and those wetlands obscured by dense forest cover may not be included in this data set. Processing of the digital data also follows conventions and standard methodologies for the time period and within limitations of available workstation equipment at the date of data development. Processing follows standard operating procedures as used, developed, and shared by the National Wetlands Inventory of the U.S. Fish and Wildlife Service. Data products were completed using similar systems and methodologies which are used by NWI and by USGS.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

For reference points accuracy, the accuracy for the digital data are tested by visual comparison of the source with hard copy maps, and by understanding of the hardware tolerances and processing values reported by the software used in data development. Additional checks on comparison were possible when georeferencing/rectification was done using the USGS maps, which cite National Mapping Accuracy Standard compliance.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey, EROS Data Center

Publication_Date: 19990225

Title: Color Infrared Aerial Photography

Edition: Varies

Geospatial_Data_Presentation_Form: Remote-Sensing Image

Publication_Information:

Publication_Place: Sioux Falls, SD

Publisher: U.S. Geological Survey

Source_Scale_Denominator: 12000

Type_of_Source_Media: Stable-Base Material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19990225

Source_Currentness_Reference: Source Photography Date

Source_Citation_Abbreviation: USGS CIR

Source_Contribution:

Primary data for photo interpretation and identification of wetland and upland classes.

Source_Information:

Source_Citation:

Citation_Information:

Originator: United States Geological Survey (USGS)

Publication_Date: 1993

Title: Digital Orthophoto Quadrangles

Edition: Varies

Geospatial_Data_Presentation_Form: digital raster data

Publication_Information:

Publication_Place: Reston, VA

Publisher: United States Geological Survey (USGS)

Source_Scale_Denominator: 24000

Type_of_Source_Media: digital raster data

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 199202

Source_Currentness_Reference: Source map date

Source_Citation_Abbreviation: USGS DOQQ

Source_Contribution:

Provided base maps for wetland and upland polygon layer information

Process_Step:

Process_Description:

Habitat maps are compiled through manual photointerpretation (using Cartgraphic Engineering 4X Mirror Stereoscopes) of USGS CIR aerial photography. Delineated wetland boundaries are manually transferred from interpreted photos to DOOQs and then manually labelled. Quality control steps occur throughout the photointerpretation, map compilation, and map reproduction processes.

Process_Date: 2001-2002

Process_Step:

Process_Description:

Mylar overlays were manually digitized using an Altek Datatab digitizer to capture the data at a resolution of at least 0.001 inches. Four control points corresponding to the four corners of the quadrangle were used for registration during data collection. Cover type features continuing onto adjacent quadrangles were adjusted to intersect the quad boundary at common, coincident node. Attributes were assigned as the data were digitized, or in an editing session after the digitizing was completed.

Process_Date: 1997-1999

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Gulf Islands National Seashore

Direct_Spatial_Reference_Method: vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 16

Transverse_Mercator:

Longitude_of_Central_Meridian: -87.0

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 0

Scale_Factor_at_Central_Meridian: 0.9996

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: Coordinate Pair

Coordinate_Representation:

Abscissa_Resolution: .61

Ordinate_Resolution: .61

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: GRS80

Semi-major_Axis: 6378206

Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Wetland and Upland Habitat Polygons

Entity_Type_Definition:

Wetlands are land transitional betwenn terrestrial and aquatic systems where the water table is usually at or near the surface of the land is covered by shallow water. Uplands are terrestrial systems that do not exhibit wetland characteristics.

Entity_Type_Definition_Source:

Cowardin, Lewis M., Virginia Carter, Francis Goblet, and Edward T. Laroe. Classification of wetlands and deepwater habitats of the United States. U.S. Fish and Wildlife Service. Biological Services Program; FWS/OBS - 79/31. 103 pp.

Attribute:

Attribute_Label: Attribute

Attribute_Definition:

The wetland classification system is hierarchical, with wetlands and deepwater habitats divided among 5 major systems at the broadest level. The five systems include Marine, Estuarine, Riverine, Lacustrine, and Palustrine. These systems are further divided into subsystems which reflect hydrologic conditions. Below the subsystems are classes and subclasses describing vegetation or substrate, and modifiers relating to hydrology, soils, water chemistry, and man's activities.

Attribute_Definition_Source:

Cowardin, Lewis M., Virginia Carter, Francis Goblet, and Edward T. LaRoe. Classification of wetlands and deepwater habitats of the United States. U.S. Fish and Wildlife Service. Biological Services Program; FWS/OBS - 79/31. 103 pp.

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name: Cowardin, et al., Wetland Classification Scheme

Codeset_Source:

Cowardin, Lewis M., Virginia Carter, Francis Goblet, and Edward T. LaRoe. Classification of wetlands and deepwater habitats of the United States. U.S. Fish and Wildlife Service. Biological Services Program; FWS/OBS - 79/31. 103 pp.

Metadata_Reference_Information:

Metadata_Date: 20050714

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, National Wetlands Research Center

Contact_Position: Metadata specialist

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 700 Cajundome Blvd

City: Lafayette

State_or_Province: Louisiana

Postal_Code: 70506

Country: USA

Contact_Voice_Telephone: 337 266-8500

Contact_Facsimile_Telephone: 337 266-8513

Metadata_Access_Constraints: None

Metadata_Use_Constraints:

Acknowledgement of the National Wetlands Research Center as the metadata source would be appreciated. Please cite the original metadata when using portions of the record to create a similar record of slightly altered data, such as reprojection.

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998