Mid-1950's Galveston Bay, Texas Wetlands Habitat Data from NWRC

Metadata:

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

Identification_Information:

Citation:

Citation_Information:

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

Publication_Date: 19880101

Title: Mid-1950's Galveston Bay, Texas Wetlands Habitat Data from NWRC

Geospatial_Data_Presentation_Form: Digital vector data

Description:

Abstract:

This data set consists of digital data describing wetland and upland habitats in the Galveston Bay and surrounding areas of Texas, in the mid-1950's. 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.

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: 19560101

Currentness_Reference: Ground Condition during source photography acquisition.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -95.625

East_Bounding_Coordinate: -94.375

North_Bounding_Coordinate: 30.875

South_Bounding_Coordinate: 29.250

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

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

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Texas

Place_Keyword: Texas Coast

Place_Keyword: Gulf of Mexico

Place_Keyword: Coastal Texas

Place_Keyword: South Texas

Place_Keyword: Galveston Bay

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 1956

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_Organization_Primary:

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

Contact_Person: Larry Handley

Contact_Position: Geographer and Principle Investigator

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

Contact_Facsimile_Telephone: 337 266-8513

Contact_Electronic_Mail_Address: larry_handley@usgs.gov

Data_Set_Credit: None

Native_Data_Set_Environment:

WAMS version 2.1 and ARC/INFO Version 7.0.4 GIS Software for Silicon Graphics (UNIX) workstations operating under IRIX version 6.2 Operating System.

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.

Logical_Consistency_Report:

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.

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.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not applicable

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Aeronautics and Space Adminstration

Publication_Date: 19560101

Title: Color Infrared Aerial Photography

Edition: Varies

Geospatial_Data_Presentation_Form: Remote-Sensing Image

Publication_Information:

Publication_Place: NASA Ames,California

Publisher:

National Aeronautics and Space Administration (NASA), United States

Source_Scale_Denominator: 65000

Type_of_Source_Media: Stable-Base Material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19560101

Source_Currentness_Reference: Source Photography Date

Source_Citation_Abbreviation: NASA CIR

Source_Contribution:

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: 19780101

Title:

USGS Topographic Quadrangles, standard 7.5 minute series maps, 1973-78 version.

Edition: Varies

Geospatial_Data_Presentation_Form: Map

Publication_Information:

Publication_Place: Reston, VA

Publisher: United States Geological Survey (USGS)

Source_Scale_Denominator: 24000

Type_of_Source_Media: Paper

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19780101

Source_Currentness_Reference: Source map date

Source_Citation_Abbreviation: USGS Quads

Source_Contribution:

Provided base maps for wetland and upland polygon layer information.

Source_Information:

Source_Citation:

Citation_Information:

Originator:

United States Fish and Wildlife Service's National Wetlands Inventory

Publication_Date: 19560101

Title: National Wetlands Inventory Hard Copy Wetland Maps

Geospatial_Data_Presentation_Form: Map

Publication_Information:

Publication_Place: St. Petersburg, Fl

Publisher: U.S. Fish and Wildlife Service's National Wetlands Inventory

Source_Scale_Denominator: 24000

Type_of_Source_Media: Hard copy maps

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19560101

Source_Currentness_Reference: Source photography for maps

Source_Citation_Abbreviation: NWI Maps

Source_Contribution: Provided hard copy maps to be digitized.

Process_Step:

Process_Description:

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

Process_Date: 1980-1983

Process_Step:

Process_Description:

The hard copy 1:24,000 NWI maps were digitized at the National Wetlands Research Center using WAMS (Wetland Analytical Mapping System).

Process_Date: 1984

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Not applicable

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: 14

Transverse_Mercator:

Longitude_of_Central_Meridian: -99

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 0

Scale_Factor_at_Central_Meridian: .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 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 249.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Wetland and Upland Habitat Polygons

Entity_Type_Definition:

Wetlands are lands transitional between 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: HAB56

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. Customized classification which can be cross-referenced to Anderson, James R., Ernest E. Hardy, John T. Roach, and Richard T. Witmer. A Land Use and Land Cover Classification System for Use with Remote Sensor Data. Geological Survey Professional Paper 964. A revision of the land use classification system as presented in U.S. Geological Survey Circular 671. United States Government Printing Office, Washington: 1976.

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.

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name:

Modified version of Anderson et al. Classification scheme for uplands.

Codeset_Source:

Can be cross-referenced to Anderson, James R., Ernest E. Hardy, John T. Roach, and Richard T. Witmer. A Land Use and Land Cover Classification System for Use with Remote Sensor Data. Geological Survey Professional Paper 964. A revision of the land use classification system as presented in U.S. Geological Survey Circular 671. Unites States Government Printing Office, Washington, DC, USA.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

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

Contact_Position: Geographer

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

Distribution_Liability:

Although these data have been processed successfully on a computer system at the U.S. Geological Survey, National Wetlands Research Center, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a Biological Resources Division server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. NWRC shall not be held liable for improper or incorrect use of the data described and/or contained herein. So, these data are provided "as is" and without any express or implied warranties, including, without limitation, the implied warranties or merchantability and fitness for a particular purpose. Also, use of trade names or commercial products in this metadata is solely for the purpose of providing specific information, and does not imply recommendation or endorsement by the US Government. Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the NWRC Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and NWRC interests.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE

Format_Version_Number: 7.1.1

File_Decompression_Technique: ARC/INFO Export .e00 Compression Format

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://sabdata.nwrc.gov>

Fees: None, if data are available online.

Custom_Order_Process: None

Metadata_Reference_Information:

Metadata_Date: 19970321

Metadata_Review_Date: 20030703

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