Galveston Bay, Texas Habitat Data from NWRC

Federal Geographic Data Committee (FGDC) Metadata:


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:
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
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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
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: .61
Longitude_Resolution: .61
Geographic_Coordinate_Units: Decimal degrees
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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/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://sdms.cr.usgs.gov/data/metadata/gav79.html
Access_Instructions:
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20030623
Metadata_Review_Date: 20140411
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
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