2001 Louisiana Coastal Marsh-Vegetative Type Map (Database)

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:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and the U.S. Geological Survey, Biological Resources Division's National Wetlands Research Center.

Publication_Date: 2001

Title: 2001 Louisiana Coastal Marsh-Vegetative Type Map (Database)

Geospatial_Data_Presentation_Form: Vector Digital data

Publication_Information:

Publication_Place: Lafayette, Louisiana, US

Publisher:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and the U.S. Geological Survey's National Wetlands Research Center.

Description:

Abstract:

This data set contains vector line information. The original data set was collected through visual field observation by Greg Linscombe of LDWF and Robert H. Chabreck of LSU Agricultural Center. The observations were made while flying over the study area (Louisiana Coastal Zone) in a Bell 206 Jet Ranger helicopter. Flight was along north/south transects spaced 1.87 miles apart from the Texas State line to the Mississippi State line. Vegetative data was obtained at pre-determined stations spaced at 0.5 miles along each transect. The stations were located using a Trimble Ag 122 Global Positioning System (GPS) and a computer running GPSView by Geowarehouse. This information was recorded manually into field tally sheets and later this information was entered into a Microsoft Access database. At this point, this information was brought into a GIS application by converting the file to a database format (dbf). The marsh type delineation lines were produced by freehanding contours through on-screen interpretation. The flight line data was used as a guide for drawing the lines. The new data set resulted in a line coverage delineating vegetative marsh types. Coverage is of the coastal region of the State of Louisiana.

Purpose:

To update the existing Louisiana Coastal Marsh-Vegetative Type data from the previous years (1997, 1988, 1979, 1968 and 1949).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20010621

Ending_Date: 20010624

Currentness_Reference:

Date of source data (actual date that the data was collected in the field).

Status:

Progress: Complete

Maintenance_and_Update_Frequency: No current plans for updating the data.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -93.905

East_Bounding_Coordinate: -88.758

North_Bounding_Coordinate: 30.482

South_Bounding_Coordinate: 28.854

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Coastal

Theme_Keyword: Marsh

Theme_Keyword: Vegetation

Theme_Keyword: Delineation lines

Theme_Keyword: Ecological characterization

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Coastal Louisiana

Place_Keyword: Louisiana Coastal Zone

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 2001

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 and the LA Department of Wildlife and Fisheries 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:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division

Contact_Person: Greg Linscombe

Contact_Position: Biologist

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 2415 Darnall Road

City: New Iberia

State_or_Province: LA

Postal_Code: 70560

Country: USA

Contact_Voice_Telephone: 337 373-0032

Contact_Facsimile_Telephone: 337 373-0181

Contact_Electronic_Mail_Address: linscombe_rg@wlf.state.la.us

Data_Set_Credit:

The U.S. Geological Survey, National Wetlands Research Center acknowledges the Louisiana Department of Wildlife and Fisheries for use of data.

Native_Data_Set_Environment:

The data set, existing in a Microsoft Access database, was converted to database format (dbf), and was brought into a GIS application. The marsh type delineation lines were produced in ArcView by freehand contouring through on-screen interpretation along transect points containing attribute data. A shapefile of the contours was created in ArcView and then converted to a coverage in ARC/INFO. The coverages were subsequently cleaned, given polygon topology, and assigned attributes. ESRI's ARC/INFO and ArcView software were used in the project. The computer operating system platform was Windows NT.

Cross_Reference:

Citation_Information:

Originator:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and U.S. Geological Survey's National Wetlands Research Center

Publication_Date: 19970601

Title: 1997 Louisiana Coastal Marsh Vegetation Type Map

Edition: 1997

Publication_Information:

Publication_Place: Lafayette, LA

Publisher:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and the U.S. Geological Survey's National Wetlands Research Center

Cross_Reference:

Citation_Information:

Originator:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and U.S. Geological Survey's National Wetlands Research Center

Publication_Date: 19880800

Title: 1988 Louisiana Coastal Marsh Vegetative Type Map (database)

Edition: 1988

Publication_Information:

Publication_Place: Lafayette, LA

Publisher:

Louisiana Department of Wildlife and Fisheries, Fur and Refuge Division, and the U.S. Geological Survey's National Wetlands Research Center

Cross_Reference:

Citation_Information:

Originator: Louisiana Department of Wildlife and Fisheries

Publication_Date: 19780800

Title: Vegetation Type Map of Louisiana Coastal Marshes 1978

Edition: 1978

Publication_Information:

Publication_Place: New Orleans, LA

Publisher: Louisiana Department of Wildlife and Fisheries

Cross_Reference:

Citation_Information:

Originator: Louisiana Wildlife and Fisheries Commission

Publication_Date: 19680800

Title: Vegetation Type Map of the Louisiana Coastal Marshes, 1968

Edition: First

Publication_Information:

Publication_Place: New Orleans, LA

Publisher: Louisiana Wildlife and Fisheries Commission

Cross_Reference:

Citation_Information:

Originator: Louisiana Department of Wildlife and Fisheries

Publication_Date: 1949

Title:

Map of Louisiana showing the Vegetation Types of Louisiana Coastal Marshes, 1949

Edition: First

Publication_Information:

Publication_Place: New Orleans, LA

Publisher: Louisiana Department of Wildlife and Fisheries

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Digital data was generated using a tabular database from which values were assigned by the data collector in the field. The accuracy is not based on a formal quantitative assessment and was based on the judgement of the data collector in the field. To attain a better estimate of accuracy, a formal re-evaluation of the Louisiana coastal marsh vegetative types would be necessary to see if there are areas where discrepancies exist.

Logical_Consistency_Report:

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.

Completeness_Report:

All data was derived in the same general format, through freehand contouring in ArcView by on-screen interpretation utilizing transect point data as a guide for contouring. During the freehand contouring of the lines between marsh types, if a levee existed, the line would follow the levee. If no levee existed, the line would split the space between the two marsh types. If a body of water existed between the marsh types, the boundary of the water body would be used to split the two categories.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: Not applicable

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not applicable

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Louisiana Department of Wildlife and Fisheries

Publication_Date: 200106

Title: Louisiana Coastal Marsh Vegetative Type Data Set

Edition: 2001

Publication_Information:

Publication_Place: New Iberia, LA

Publisher: Louisiana Department of Wildlife and Fisheries

Type_of_Source_Media: Digital Database file

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20010621

Ending_Date: 20010624

Source_Currentness_Reference: Date of source data

Source_Citation_Abbreviation: LDWF

Source_Contribution: Primary data for the Vegetative Marsh Type Map

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Wetlands Inventory

Publication_Date: 19880101

Title: NWI Digital Vector Wetlands Data

Edition: Varies

Geospatial_Data_Presentation_Form: Map

Publication_Information:

Publication_Place: St. Petersburg, FL

Publisher: USFWS National Wetlands Inventory

Source_Scale_Denominator: 24000

Type_of_Source_Media: Digital database file

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19880101

Source_Currentness_Reference: Date of photography source data

Source_Citation_Abbreviation: NWI

Source_Contribution: Data was used to create an upland/marsh boundary.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Earth Observation Satellite Company

Publication_Date: 1992

Title: Landsat Thematic Mapper (TM) color raster imagery

Edition: Varies

Geospatial_Data_Presentation_Form: Remote-Sensing Image

Publication_Information:

Publication_Place: Lanham, MD

Publisher: Earth Observation Satellite Company

Type_of_Source_Media: Digital database file

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19921101

Ending_Date: 19930301

Source_Currentness_Reference: Date of imagery source data

Source_Citation_Abbreviation: EOSAT

Source_Contribution: Data was used to create a coast/water boundary.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Satellite Pour L'Observation de la Terre

Publication_Date: 1990 - 1995

Title: Black and white digital raster SPOT imagery

Edition: Varies

Geospatial_Data_Presentation_Form: Remote-sensing image

Publication_Information:

Publication_Place: Toulouse, France

Publisher: Satellite Pour L'Observation de la Terre

Type_of_Source_Media: Digital database file

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19900101

Ending_Date: 19950101

Source_Currentness_Reference: Date of imagery source data

Source_Citation_Abbreviation: SPOT

Source_Contribution: Data was used to create a coast/water boundary.

Process_Step:

Process_Description:

The original data set was collected through visual field observation by Greg Linscombe of LDWF and Robert H. Chabreck of LSU Agricultural Center. The observations were made while flying over the study area (Louisiana Coastal Zone) in a Bell 206 Jet Ranger helicopter. GPSView Extension in ArcView software (ESRI) and a differental GPS (Trimble Ag 122) were used to navigate the helicopter along the transect lines. Attribute information was recorded manually in a field tally sheet at stations along the transects. This information was then entered in a Microsoft Access database containing all the attribute information. Digtial imagery (TM/SPOT merge), NWI habitat vector data, and the collected data were utilized to create a line for the coast/water boundary and a line for the upland/marsh boundary. The marsh type delineation lines were produced by freehanding contours through on-screen interpretation. The flight data was used as a guide for delineating the marsh type lines. The shapefile containing the contour information was created in ArcView and later converted to a coverage in ARC/INFO. The coverage was subsequently cleaned, assigned polygon topology, and assigned attributes. Attributes assigned included: fresh marsh, intermediate marsh, brackish marsh, salt marsh, non-marsh/other, and water. The vegetative type was an indicator of soil and water salinity of an area and was comprised of an association of plant species having similar salt tolerances.

Process_Date: 19980101

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Louisiana Coast Zone

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: Unknown

Longitude_Resolution: Unknown

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Vegetative Marsh Types

Entity_Type_Definition:

An indicator of soil and water salinity of an area and comprised of plant species having similar salt tolerances

Entity_Type_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute:

Attribute_Label: VEG_CODE

Attribute_Definition: Vegetative Marsh type

Attribute_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: F

Enumerated_Domain_Value_Definition:

Typical vegetation is maidencane (Panicum hemitomon), pennywort (Hydrocotyle spp.), water hyacinth (Eichhornia crassipes), pickerelweed (Pontederia cordata), alligatorweed (Alternanthera philoxeroides), and bulltongue (Sagittaria falcata).

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: I

Enumerated_Domain_Value_Definition:

Intermediate Marsh. Marshes of low salinity with typical vegetation consisting of wiregrass (Spartina patens), deer pea (Vigna repens), bulltongue, Walter's millet (Echinochloa walteri), bullwhip (Scirpus californicus), and sawgrass (Cladium jamaicense).

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: B

Enumerated_Domain_Value_Definition:

Brackish Marsh. Marshes of moderate salinity with typical vegetation consisting of wiregrass, three-cornered grass (Scirpus olneyi), saltmarsh bulrush (Scirpus robustus), and widgeongrass (Ruppia maritima).

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: S

Enumerated_Domain_Value_Definition:

Salt Marsh. Typical vegetation is oystergrass (Spartina alterniflora), glasswort (Salicornia spp.), black rush (Juncus roemerianus), saltwort (Batis maritima), black mangrove (Avicennia germinans), and saltgrass (Distichlis spicata).

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: N

Enumerated_Domain_Value_Definition: Non-marsh/other

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: W

Enumerated_Domain_Value_Definition: Water

Enumerated_Domain_Value_Definition_Source:

Louisiana Coastal Marsh Vegetative Type Map 1988, Louisiana Department of Wildlife and Fisheries.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Swamp

Enumerated_Domain_Value_Definition: Swamp

Enumerated_Domain_Value_Definition_Source: 2001 Marsh Vegetative Type Project defined

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

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

Contact_Person: Steve Hartley

Contact_Position: Senior Geographer/GIS Analyst

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: 337 266-8543

Contact_Facsimile_Telephone: 337 266-8616

Contact_Electronic_Mail_Address: steve_hartley@usgs.gov

Hours_of_Service: 8 AM to 4 PM CST Monday thru Friday

Resource_Description: Louisiana Coastal Zone 2001 Vegetative Marsh Type Map

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. U.S. Geological Survey, National Wetlands Research Center 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 U.S. Geological Survey, National Wetlands Research Center Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and U.S. Geological Survey, National Wetlands Research Center interests.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: None

Format_Version_Number: None

File_Decompression_Technique: None

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

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

Fees: None, if available on-line

Custom_Order_Process: Not available

Metadata_Reference_Information:

Metadata_Date: 20011018

Metadata_Review_Date: 20011019

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Helena Schaefer

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: LA

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

Hours_of_Service: 8 AM to 4 PM CST Monday thru Friday

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