Galveston Bay, Texas Habitat Data from NWRC

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

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

Publication_Date: 1980's

Title: Galveston Bay, Texas Habitat Data from NWRC

Edition:

Geospatial_Data_Presentation_Form: Digital vector data

Series_Information:

Series_Name:

Issue_Identification:

Publication_Information:

Publication_Place: Lafayette, Louisiana

Publisher: USGS, BRD, National Wetlands Research Center

Other_Citation_Details:

Online_Linkage: http://sdms.nwrc.gov/pub/tex.html

Description:

Abstract:

This data set consists of digital data describing wetland and upland habitats in the Galveston Bay and surrounding areas of Texas, in 1979. The data set includes 42 7.5' quadrangles which were digitized at the U.S. Geological Survey, National Wetlands Research Center using WAMS (Wetland Analytical Mapping System), from 1:24,000 scale hard copy maps developed by the National Wetlands Inventory (NWI). Wetlands were classified according on the NWI maps using the Cowardin, et al., wetland classification scheme to the level of salinity modifiers. Uplands were classified using a customized classification scheme which can be cross-referenced to Anderson, et al., and were added by NWRC. Digital data are available by 7.5' quadrangles. NASA High altitude 1:65,000 color infrared aerial photographs were photo interpreted for wetland and upland habitat classifications. Habitat layer was overlaid on USGS Quad base maps to create the NWI maps. The hard copy 1:24,000 NWI maps were digitized at the National Wetlands Research Center using WAMS (Wetland Analytical Mapping System).

Purpose:

Not Available

Supplemental_Information:

Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19560101

Ending_Date: 19881231

Currentness_Reference:Unknown

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -95.625

East_Bounding_Coordinate: -94.375

North_Bounding_Coordinate: 30.875

South_Bounding_Coordinate: 29.25

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS

Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > WETLANDS

Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES > MARSHES

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS > ESTUARINE WETLANDS

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS > MARSHES

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS > SWAMPS

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS > ESTUARINE WETLANDS

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS > MARSHES

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS > SWAMPS

Theme_Keyword: Basins

Theme_Keyword: Bays

Theme_Keyword: Bayous

Theme_Keyword: Canals

Theme_Keyword: Floodplain

Theme_Keyword: Wetlands

Theme_Keyword: Marshes

Theme_Keyword: Swamps

Theme_Keyword: Marshlands

Theme_Keyword: Habitats

Theme_Keyword: Uplands

Theme_Keyword: Vegetation Types

Theme_Keyword: Land Cover Types

Theme_Keyword: Landform Types

Theme_Keyword: Coast

Theme_Keyword: Coastal

Theme_Keyword: Delta

Theme_Keyword: Coastal Habitats

Theme_Keyword: Geographic Information System Data

Theme_Keyword: Classified Aerial Photography

Theme_Keyword: Maps

Theme_Keyword: Mapping

Theme_Keyword: National Wetlands Inventory

Theme_Keyword: Gulf Of Mexico

Theme_Keyword: Texas

Theme_Keyword: Texas Coast

Theme_Keyword: Coastal Texas

Theme_Keyword: South Texas

Theme_Keyword: Galveston Bay

Theme_Keyword: 1956

Theme_Keyword: 1979

Theme_Keyword: 1988

Theme_Keyword: BIOTA

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: INLAND WATERS

Theme_Keyword: OCEANS

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO > GALVESTON BAY

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS > SOUTH TEXAS

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 NWRC 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_Person_Primary:

Contact_Person: LARRY HANDLEY

Contact_Position: INVESTIGATOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: U.S. Geological Survey, Biological Resources Division,

Address: National Wetlands Research Center

Address: 700 Cajundome Blvd

City: Lafayette

State_or_Province: Louisiana

Postal_Code: 70506

Country: USA

Contact_Voice_Telephone: 337-266-8691

Contact_Facsimile_Telephone: 337-266-8513

Contact_Electronic_Mail_Address: larry_handley@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The attribute accuracy was tested using several methods during the data development phases and completion. Data was 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. In addition, WAMS software tests the attributes. Overall, the attribute accuracy is believed high due to the multiple cerror-checking steps done redundantly during processing. Process testing was done on the multiple staff error-checking steps and software error-checking steps to develop estimates of the accuracy and error rates. The final accuracy assessment used calculated average accuracy and error rates for the human stages and software verification stages, which were done redundantly to insure double checking verification of the data coverages comprising the data set. Exact tolerances vary with coverages, as does the date of the processing and testing. The final accuracy values expressed are the best summation which can be developed from the smaller areas which comprise the data set. Data has been checked and verified against original maps and over years of use. The accuracy values expressed represent the final calculated accuracy estimate of the multiple steps of data development from source photography to completed data. The actual final should be considered as average and perhaps conservative or over estimating the percent change of error for areas in this data set. This logical consistency report includes information about both general and specific topological tests and data generation dynamics in the fidelity of data. Data is inherently polygonal. 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 points 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 for each quad is generated by connecting four corners of a digital file, as established during initialization 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. Tests for logical consistency are performed by WAMS verification software. 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. 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.

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: .61

Longitude_Resolution: .61

Geographic_Coordinate_Units: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: DOI/USGS/BRD/NWRC/SDMS > Spatial Data and Metadata Server, National Wetlands Research Center, Biological Resources Division, USGS, U.S. Department of the Interior

Contact_Person: HELENA SCHAEFFER

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: U.S. Geological Survey, National Wetlands

Address: 700 Cajundome Blvd.

City: Lafayette

State_or_Province: LOUISIANA

Postal_Code: 70506

Country: USA

Contact_Voice_Telephone: 337 266-8696

Contact_Facsimile_Telephone: 337 266-8616

Contact_Electronic_Mail_Address: helena_schaefer@usgs.gov

Resource_Description: usgs_nwrc_texaswetlands

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://sdms.cr.usgs.gov/pub/resource.html

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20030623

Metadata_Review_Date: 20121221

Metadata_Future_Review_Date: 20040629

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: TYLER B. STEVENS

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: NASA Goddard Space Flight Center

Address: Global Change Master Directory

City: Greenbelt

State_or_Province: MD

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: (301) 614-6898

Contact_Facsimile_Telephone: 301-614-5268

Contact_Electronic_Mail_Address: Tyler.B.Stevens@nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time