Hydrography Breakline Data, SW quadrant of Lake Charles Southeast quadrangle, Louisiana, UTM 15 NAD83, Louisiana Federal Emergency Management Agency (FEMA) Project - Phase 2 of Louisiana LIDAR Data Development: Calcasieu Parish, Louisiana under the Watershed Concepts contract number EMT-2002-CO-0048, Task Order 012. [bhy_3009364sw.gen]

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Watershed Concepts

Publication_Date: 2003

Title:

Hydrography Breakline Data, SW quadrant of Lake Charles Southeast quadrangle, Louisiana, UTM 15 NAD83, Louisiana Federal Emergency Management Agency (FEMA) Project - Phase 2 of Louisiana LIDAR Data Development: Calcasieu Parish, Louisiana under the Watershed Concepts contract number EMT-2002-CO-0048, Task Order 012. [bhy_3009364sw.gen]

Description:

Abstract:

This is a dataset of select hydrography breaklines over the SW quadrant of the Lake Charles Southeast quadrangle, Louisiana. The breaklines represent the water edge for wide channel rivers and canals, and the shoreline of lakes.

These data were produced for the Louisiana Federal Emergency Management Agency (FEMA) Project - Phase 2 of Louisiana LIDAR Data Development: Calcasieu Parish, Louisiana under the Watershed Concepts contract number EMT-2002-CO-0048, Task Order 012.

BHY breaklines define the land water interface for all ponds, lakes and double sided waterways whose distance from channel bank to channel bank is greater than 50 feet (15 meters).

The data are provided in ArcInfo 'generate' format suitable for input into a TIN model.

Purpose:

These data improve the representation of terrain in an elevation model where point data is insufficient to provide a good representation, where flow channels are blocked from (LIDAR) view by vegetation, and where minor variations in sensed surface elevation would otherwise give rise to contours in and across large water bodies.

Supplemental_Information:

The metadata for this image are encapsulated into several documents. The metadata are not complete if you did not receive the following files along with the data set:

bhy_3009364sw.mtd - this metadata in mp (metadata parser) compatible ASCII text form
bhy_3009364sw.html - this metadata in HTML form
bhy_3009364sw_faq.html - this metadata presented as Questions and Answers
bhy_3009364sw.sgml - this metadata in SGML form
bhy_3009364sw.xml - this metadata in XML form

The information depicted on this map are the results of the survey on the dates indicated and can only be considered as indicating the general conditions existing at the time.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2003

Currentness_Reference: Date these breakline data were developed

Status:

Progress: complete

Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -90.5625

East_Bounding_Coordinate: -90.5000

North_Bounding_Coordinate: +30.9375

South_Bounding_Coordinate: +30.8750

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: framework

Theme_Keyword: breakline

Theme_Keyword: elevation

Theme_Keyword: hydrography

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Louisiana

Place_Keyword: Calcasieu Parish

Access_Constraints: none

Use_Constraints:

These unaltered data may not be redistributed without all of the elements of the metadata listed in the Supplemental_Information section of this metadata document.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Watershed Concepts

Contact_Person: David Key, P.E.

Contact_Address:

Address_Type: Mailing and physical address

Address: 3333 Regency Parkway, Suite 120

City: Cary

State_or_Province: North Carolina

Postal_Code: 27511

Contact_Voice_Telephone: (919)868-5155

Native_Data_Set_Environment: ArcInfo 8.0.2 on Windows 2000

Data_Quality_Information:

Logical_Consistency_Report:

The breaklines were constructed under the model representation that water courses vary linearly in elevation or are constant in elevation between critical points established in the breakline model. These breaklines were determined from LIDAR and orthophoto data of specific dates and that model the land/water contributions and extents on those dates.

Completeness_Report:

This data set models rivers and canals that consistently meet or exceed 25 meters in width and lakes or ponds that are 50 or more meters in length along the long axis.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Watershed Concepts

Publication_Date: 2003

Title:

Raw LIDAR Elevation Data, SW quadrant of Lake Charles Southeast quadrangle, Louisiana, UTM 15 NAD83, Louisiana Federal Emergency Management Agency (FEMA) Project - Phase 2 of Louisiana LIDAR Data Development: Calcasieu Parish, Louisiana under the Watershed Concepts contract number EMT-2002-CO-0048, Task Order 012. [raw_3009364sw.csv]

Type_of_Source_Media: computer file

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 200202

Source_Currentness_Reference:

Approximate date of LIDAR survey used to build the source data for this data set

Source_Citation_Abbreviation: RAW_3009364sw

Source_Contribution: Raw LIDAR data from which this data set was derived

Source_Information:

Source_Citation:

Citation_Information:

Originator: Louisiana Oil Spill Coordinator's Office (LOSCO)

Originator: United States Geological Survey (USGS)

Publication_Date: 2000

Title:

Color Infrared Orthophotography of Louisiana, LOSCO, USGS (2000)

Type_of_Source_Media: computer file

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 199801

Ending_Date: 199803

Source_Currentness_Reference:

Primary date range of aerial photography from which orthophotography was produced.

Source_Citation_Abbreviation: GEOTIFF

Source_Contribution: Reference data set for water body selection and delineation

Process_Step:

Process_Description:

RAW_3009364sw data was edited using ELVIS software to eliminate above-ground features such as buildings, trees and overpasses.

Process_Date: 2003

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001, Inc.

Contact_Position: LIDAR Manager

Contact_Address:

Address_Type: mailing and physical address

Address: 5525 Mounes, Suite 102

City: New Orleans

State_or_Province: LA

Postal_Code: 70123

Contact_Voice_Telephone: (504) 733-3001

Process_Step:

Process_Description:

TerraModeler software was used to display the reference GeoTIFF orthophotos and the ELVIS edited raw_3009364sw LIDAR point data and to construct breaklines for the water edge of wide channel rivers and canals, and the shoreline of lakes. Breakline elevations were linearly ramped between identified critical elevation points along flowing water courses or were set at a fixed level for lakes based on lowest observed shoreline elevation or water return elevation. The breakline data from individual 3.75' tiles are edgematched into regional breaklines, clipped to an exact 3.75 minute tile then converted to a format suitable for 'generate' input in an ArcInfo CREATETIN process.

Process_Date: 2003

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: N\A

Time_of_Day: 14482900

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 15

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -93.000000

Latitude_of_Projection_Origin: +00.000000

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.001

Ordinate_Resolution: 0.001

Planar_Distance_Units: Meters

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

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988

Altitude_Resolution: 0.01

Altitude_Distance_Units: Survey Feet

Altitude_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The data consist of a series of arcs represented as a list of xyz coordinates for vertices. All the arcs are coded to represent 'hard' breaklines.

Entity_and_Attribute_Detail_Citation: ArcInfo on-line help, the 'generate' section for CREATETIN.

Metadata_Reference_Information:

Metadata_Date: 20030620

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: 3001, Inc.

Contact_Address:

Address_Type: mailing and physical address

Address: 5525 Mounes Street, Suite 102

City: New Orleans

State_or_Province: LA

Postal_Code: 70123

Contact_Voice_Telephone: (504) 733-3001

Contact_Facsimile_Telephone: (504) 734-8938

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998