brevard_5nn

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Jones Edmunds & Associates

Publication_Date: 20100126

Title: brevard_5nn

Geospatial_Data_Presentation_Form: raster digital data

Online_Linkage: \\Gismain1\FDEM1a\USGS_DEM\USGS_Brevard\Brevard_DEM\brevard_5nn

Description:

Abstract:

Raster grids provide a 2-dimensional representation of the earth's surface. This raster grid is derived from a terrain dataset created from LiDAR data flown in the summer of 2007.

Purpose:

Raster grid contains information that will be used to create hydraulic and hydrologic models.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2007

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -80.895332

East_Bounding_Coordinate: -80.438822

North_Bounding_Coordinate: 28.803897

South_Bounding_Coordinate: 27.812653

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: LIDAR

Theme_Keyword: Digital Terrain Model (DTM)

Theme_Keyword: FDEM

Theme_Keyword: Florida Division of Emergency Management

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Florida

Place_Keyword: Brevard County

Access_Constraints:

The data are being provided on an 'as is' basis. Jones Edmunds specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will Jones Edmunds or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the Jones Edmunds has been advised of the possibility of such damages. All data are intended for resource management use.

Use_Constraints:

Use of these data requires a general understanding of GIS. Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jones Edmunds & Associates

Contact_Address:

Address_Type: mailing and physical address

Address: 730 NE Waldo Road

City: Gainesville

State_or_Province: Florida

Postal_Code: 32641

Country: USA

Contact_Voice_Telephone: 352.377.5821

Hours_of_Service: 8am-5pm

Contact_Instructions: telephone

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: DEM data

Logical_Consistency_Report: The data should be complete without any gaps.

Completeness_Report: Complete

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: created from LiDAR data that should meet 3.8 foot (2.2 ft RMSE)

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

created from LiDAR data that should meet .6 foot fundamental vertical accuracy

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Terrapoint USA

Publication_Date: 2007

Publication_Time: Unknown

Title: Lidar

Geospatial_Data_Presentation_Form: vector digital data

Other_Citation_Details:

LiDAR Survey of Brevard County, Florida, conducted in 2007 in support of the Florida Division of Emergency Management (FDEM).

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2007

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Lidar

Source_Contribution:

LiDAR dataset was used to create intensity stereopairs for 3D breakline compilation.

Process_Step:

Process_Description:

The ABGPS, IMU, and raw Optech 3100ea LiDAR scans are integrated using Optech Incorporated's DASHMap, version 1.1 software, Terrascan software and Microstation software. The resultant file is in a LAS binary file format . The LAS file version 1.1 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are referenced to the NAD83 horizontal datum and GRS80 vertical datum. The date and time for each flight line can be determined using the Julian date and time. The Julian date is a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE on the Julian Calendar.

Source_Used_Citation_Abbreviation: Airborne Global Positioning System Data

Source_Used_Citation_Abbreviation: Inertial Measurement Unit

Source_Used_Citation_Abbreviation: LiDAR Scans

Process_Date: 2008

Source_Produced_Citation_Abbreviation: LiDAR Point Cloud LAS 1.1 format

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Terrapoint USA

Contact_Position: LiDAR Manager

Contact_Address:

Address_Type: mailing and physical address

Address: 251216 Grogan's Park Drive

City: The Woodlands

State_or_Province: Texas

Postal_Code: 77380

Country: USA

Contact_Voice_Telephone: 1-877-999-7687

Contact_Facsimile_Telephone: 1-281-296-0869

Contact_Electronic_Mail_Address: peggy.cobb@terrapoint.com

Hours_of_Service: Monday to Friday, 8 - 5, CST

Process_Step:

Process_Description:

The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters are applied as appropriate for the production of bare earth digital terrain models (dtms). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as define by the LAS 1.1 specification. In addition the following fields are included (Precision reported in brackets): Class (Integer); GPS Week Time (0.0001 seconds); Easting (0.01 meter); Northing (0.01 meter); Elevation (0.01 meter); Echo Number (Integer 1 to 4); Echo (Integer 1 to 4); Intensity (8 Bit Integer); Flightline (Integer); Scan Angle (Integer Degree). The LAS files do not include overlap. The data was classified as follows: Class 1 = Unclassified. This class includes vegetation, buildings, noise etc. Class 2 = Ground Class 7= Noise Class 9 = Water

Source_Used_Citation_Abbreviation: LiDAR Point Cloud LAS 1.1 format

Process_Date: 2008

Source_Produced_Citation_Abbreviation: Classified LiDAR datasets

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Terrapoint USA

Contact_Position: LiDAR Manager

Contact_Address:

Address_Type: mailing and physical address

Address: 251216 Grogan's Park Drive

City: The Woodlands

State_or_Province: Texas

Postal_Code: 77380

Country: USA

Contact_Voice_Telephone: 1-877-999-7687

Contact_Facsimile_Telephone: 1-281-296-0869

Contact_Electronic_Mail_Address: peggy.cobb@terrapoint.com

Hours_of_Service: Monday to Friday, 8 - 5, CST

Process_Step:

Process_Description:

Ground points were extracted from the Lidar dataset and converted to a multipoint feature class using ArcGIS.

Source_Used_Citation_Abbreviation: Projected and tiled LiDAR datasets

Process_Date: 2008

Source_Produced_Citation_Abbreviation: Ground masspoint

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Dewberry - Geospatial Services Group

Contact_Address:

Address_Type: mailing and physical address

Address: 8401 Arlington Boulevard

City: Fairfax

State_or_Province: VA

Postal_Code: 22031

Country: USA

Contact_Voice_Telephone: 703.849.0100

Process_Step:

Process_Description:

A breakline enforced terrain was created in ArcCatalog using the vector breakline data and masspoints from the FDEM Brevard delivery area (Brevard County). Masspoints were set as the Surface Feature Type "mass points", the shoreline, hydrographic feature, island, and road breaklines were set as the Surface Feature Type "hard line", soft feature breaklines were set as the Surface Feature Type "soft line", and water body breaklines were set as the Surface Feature Type "hard replace".

Process_Date: 012010

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jones Edmunds & Associates

Contact_Address:

Address_Type: mailing and physical address

Address: 730 NE Waldo Road

City: Gainesville

State_or_Province: Florida

Postal_Code: 32641

Country: USA

Contact_Voice_Telephone: 352.377.5821

Process_Step:

Process_Description:

The DEM was created using ArcCatalog's 'Terrain to Raster' tool. 'Natural_Neighbors' was chosen as the sampling method and a cell size of 5 feet was designated. The raster was clipped with the coastal shoreline feature class to remove DEM artifacts in the water.

Process_Date: 012010

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jones Edmunds & Associates

Contact_Address:

Address_Type: mailing and physical address

Address: 730 NE Waldo Road

City: Gainesville

State_or_Province: Florida

Postal_Code: 32641

Country: USA

Contact_Voice_Telephone: 352.377.5821

Process_Step:

Process_Description:

Erroneous elevation values were found in the DEM. The actual maximum elevation for this DEM is 87.9694 feet but sporadic erroneous values up to 252258.125 feet were found.
The erroneous values were converted to NULL values by first splitting the DEM in 8 pieces roughly equal in area. Then in ArcMap's Raster Calculator, the following function was run:
SETNULL([RASTER] > 100, [RASTER])
This effectively replaces any elevation value greater than 100 feet with a NULL value and retains any values <= 100.

Process_Date: July, 2010

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: SJRWMD

Contact_Position: GIS

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 72000

Column_Count: 29179

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Transverse Mercator

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999941

Longitude_of_Central_Meridian: -81.000000

Latitude_of_Projection_Origin: 24.333333

False_Easting: 656166.666667

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 5.000000

Ordinate_Resolution: 5.000000

Planar_Distance_Units: survey feet

Geodetic_Model:

Horizontal_Datum_Name: D_North_American_1983_HARN

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Resolution: 1.000000

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Metadata_Reference_Information:

Metadata_Date: 20100126

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Jones Edmunds & Associates

Contact_Person: GIS Department Manager

Contact_Address:

Address_Type: mailing and physical address

Address: 730 NE Waldo Road

City: Gainesville

State_or_Province: Florida

Postal_Code: 32641

Contact_Voice_Telephone: 352.377.5821

Contact_Facsimile_Telephone: 352.377.3166

Hours_of_Service: 8am-5pm

Contact_Instructions: telephone

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints:

The data are being provided on an 'as is' basis. Jones Edmunds specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will Jones Edmunds or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if Jones Edmunds has been advised of the possibility of such damages. All data are intended for resource management use.

Metadata_Use_Constraints:

Use of these data requires a general understanding of GIS. Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data.