eden_dem_cm_nov07.nc

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:

Kevin Chartier

John Jones

Publication_Date: 200711

Title: eden_dem_cm_nov07.nc

Geospatial_Data_Presentation_Form: raster digital data

Online_Linkage: <http://sofia.usgs.gov/eden/data/dem/eden_dem_cm_nov07.nc>

Description:

Abstract:

This is the 1st release of the third version of an Everglades Depth Estimation Network (EDEN) digital elevation model (DEM) generated from certified airborne height finder (AHF) and airboat collected ground surface elevations for the Greater Everglades Region. This version includes all data collected and certified by the USGS prior to the conclusion of the AHF collection process. It differs from the previous elevation model (EDEN_EM_JAN07) in that the modeled area of WCA3N (all the WCA3A area north of I-75) is increased while the modeled area of the Big Cypress National Preserve (BNCP) has been both refined and reduced to the region where standard error of cross-validation points falls below 0.16 meters. EDEN offers a consistent and documented dataset that can be used to guide large-scale field operations, to integrate hydrologic and ecological responses, and to support biological and ecological assessments that measure ecosystem responses to Comprehensive Everglades Restoration Plan. To produce historic and near-real time maps of water depths, the EDEN requires a system-wide DEM of the ground surface.

This file is a modification of the eden dem released in October of 2007 (i.e., eden_em_oct07) in which the elevation values have been converted from meters (m) to centimeters(cm) for use by EDEN applications software. This file is intended specifically for use in the EDEN applications software. Aside from this difference in horizontal units, the following documentation applies.

Purpose:

These data were specifically created for the development of water depth information using interpolated water surfaces from the EDEN stage data network.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1995

Ending_Date: 2007

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -81.363536

East_Bounding_Coordinate: -80.22176

North_Bounding_Coordinate: 26.683613

South_Bounding_Coordinate: 25.229604

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: digital elevation model

Theme_Keyword: mapping

Theme_Keyword: DEM

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: elevation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: 006

Theme_Keyword: 010

Place:

Place_Keyword_Thesaurus:

Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, DC, National Institute of Standards and Technology

Place_Keyword: United States

Place_Keyword: US

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, DC, NIST

Place_Keyword: Florida

Place_Keyword: FL

Place:

Place_Keyword_Thesaurus:

Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology

Place_Keyword: Broward County

Place_Keyword: Collier County

Place_Keyword: Miami-Dade County

Place_Keyword: Monroe County

Place_Keyword: Palm Beach County

Place:

Place_Keyword_Thesaurus: USGS Geographic Names Information System

Place_Keyword: Everglades National Park

Place_Keyword: Big Cypress National Preserve

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Central Everglades

Place_Keyword: Greater Lake Okeechobee

Place_Keyword: SW Big Cypress

Place_Keyword: WCA1

Place_Keyword: Water Conservation Area 1

Place_Keyword: WCA2

Place_Keyword: Water Conservation Area 2

Place_Keyword: WCA3

Place_Keyword: Water Conservation Area 3

Place_Keyword: Greater Everglades region

Access_Constraints:

These data were produced for EDEN operational water depth estimation and applications.

Use_Constraints:

The user is cautioned that this elevation model was produced specifically for EDEN applications and is based on input data of approximately 400m sample spacing and +/- 15cm vertical accuracy. No statement of appropriateness for uses other than that intended are implied.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kevin Chartier

Contact_Organization: University of Florida

Contact_Address:

Address_Type: mailing address

Address: 3205 College Avenue

City: Davie

State_or_Province: FL

Postal_Code: 33314-7719

Contact_Voice_Telephone: 954 577-6382

Contact_Electronic_Mail_Address: kchart@ufl.edu

Browse_Graphic:

Browse_Graphic_File_Name: <http://sofia.usgs.gov/eden/models/groundelevmod.php>

Browse_Graphic_File_Description: graphic showing the coverage of EDEN_EM_OCT07

Browse_Graphic_File_Type: php

Native_Data_Set_Environment: NetCDF file

Cross_Reference:

Citation_Information:

Originator: Pamela Telis

Publication_Date: 2006

Title:

The Everglades Depth Estimation Network (EDEN) for support of ecological and biological assessments

Geospatial_Data_Presentation_Form: fact sheet

Series_Information:

Series_Name: USGS Fact Sheet

Issue_Identification: 2006-3087

Publication_Information:

Publication_Place: St. Petersburg, FL

Publisher: U.S. Geological Survey

Online_Linkage: <http://sofia.usgs.gov/publications/fs/2006-3087/index.html>

Cross_Reference:

Citation_Information:

Originator: Jones, J. W.

Publication_Date: 2001

Title:

Image and in situ data integration to derive sawgrass density information for surface-flow modeling in the Everglades

Geospatial_Data_Presentation_Form: report

Publication_Information:

Publication_Place: Wallingford, Oxfordshire, UK

Publisher: International Association of Hydrological Sciences

Other_Citation_Details:

in Remote Sensing and Hydrology 2000, editors Manfred Owe, Kaye Brubaker, Jerry Ritchie, and Albert Rango, publicaton 267, ISBN 1-901502-46-5

Cross_Reference:

Citation_Information:

Originator: Desmond, G. B.

Publication_Date: 2003

Title:

Measuring and mapping the topography of the Florida Everglades for Ecosystem Restoration

Geospatial_Data_Presentation_Form: fact sheet

Series_Information:

Series_Name: USGS Fact Sheet

Issue_Identification: 021-03

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <http://sofia.usgs.gov/publications/fs/021-03/index.html>

Data_Quality_Information:

Logical_Consistency_Report:

The EDEN monitoring network includes ground-elevation measurements and continuous water-level data.

Completeness_Report:

Ground-surface elevation data were collected by the USGS at more than 50,000 points with an approximate spacing of 400 meters covering almost the entire Greater Everglades. The EDEN water-level network consists of hourly water-level data from 253 gaging stations (230 existing gaging stations and 23 new installations) and includes freshwater (nontidal) marsh gaging stations, boundary gages on canals, and coastal gaging stations operated by the Big Cypress National Preserve (BCNP), Everglades National Park (ENP), South Florida Water Management District (SFWMD), and USGS. The U.S. Army Corps of Engineers (USACE) and SFWMD recently documented or surveyed a majority of the hydrologic gages in the Greater Everglades to obtain correct values for converting water-level data from NGVD 29 to NAVD 88. The NAVD 88 datum is consistent in comparing water-level data across the Greater Everglades and computing accurate water depths.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal positions are established by GPS observations and are referenced to the North American Datum of 1983 (NAD83). The desired horizontal accuracy is +/- 15 centimeters. This level of accuracy is consistent with GPS differential techniques which use two stations - a high-quality dual-frequency GPS receiver base station and a roving GPS station. The density and accuracy of a given GPS data observation varies from a few meters to a few centimeters according to the Position Dilution of Precision (PDOP) in the study area. Generally if the PDOP is observed to be excessive, data collection is discontinued or the data are discarded. The PDOP is an indicator of the positional accuracy of the GPS that be can derived from the current GPS satellite geometry, which varies continuously. Generally the smaller the PDOP number, the higher the data quality. The PDOP is a permanent part of the recorded data and is also included in the post processing procedures during reduction of the GPS observations to NAD 83. Where possible, the GPS base station has an ellipsoid height to an accuracy of two centimeters relative to the Continuously Operating Reference Stations (CORS) or the High Accuracy Reference Network (HARN), both operated by the National Geodetic Survey (NGS).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Source data (HAED) collected to better than +/- 15cm. Standard errors of cross-validation for the DEM range from ~7cm to 17cm depending on the EDEN subarea. This version is composed of new models created for WCA3N and the BCNP combined with the mosaic of two versions (i.e., eden_v002a for WCA1 and eden_v002c for all other EDEN subregions) that comprised EDEN_EM_JAN07. The previous mosaic was selected based on analysis of model performance in the water depth estimation process. The WCA1 surface was produced by removing all "upland" AHF points as defined by a reclassification of the Florida GAP process. For WCA1, the krigging model was developed based on statistics from the entire EDEN domain (the process for eden_v002a production). For each other EDEN sub-area (i.e., the other WCAs and the National Park) region specific krigging models were developed and applied.

Lineage:

Process_Step:

Process_Description:

The EDEN domain was broken into a large number of equal-sized rectangles (cells) that in total are referred to as the "grid". Characteristics of this grid, such as location of the centroid, the representative area of the Everglades, elevation, and percentage of vegetation type, define the grid spatial parameters. To match the Airborne Height Finder (AHF) data sampling spacing, the spatial resolution or the dimension (in ground distance) of each grid cell is 400 meters on each side. The ground surface DEM development process is iterative as additional high accuracy elevation data (HAED) are collected, water surfacing algorithms improve, and additional ground-based ancillary data become available. The DEMs used in the EDEN analysis through the summer of 2006 rely on version HAEDbeta2 of HAED. However, this version was produced by using all available AHF points posted to SOFIA as of August 2007. To create a realistic region-wide elevation model for EDEN purposes, the elevation data were segregated by Water Conservation Areas and National Park boundaries so that local trends could be isolated, sub-region specific interpolation models could be developed, and realistic breaks in elevation along sub-region boundaries could be imbedded in a final, region-wide DEM, To date the best performing DEMs for all subareas have been produced using the geostatistical approach called "anisotropic ordinary kriging". The latest iteration of the EDEN DEM used in EDEN applications is referenced as eden_em_oct07.

Process_Date: 2007

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: John Jones

Contact_Organization: U.S. Geological Survey

Contact_Position: Project chief

Contact_Address:

Address_Type: mailing address

Address: 521 National Center

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: 703 648-5543

Contact_Facsimile_Telephone: 703 648-4165

Contact_Electronic_Mail_Address: jwjones@usgs.gov

Process_Step:

Process_Description:

The DEM with elevations in meters was converted to a NetCDF file with the elevations in centimeters for use with the EDENapps. The conversion was done with JEM NetCDF writer software.

Process_Date: 200711

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Kevin Chartier

Contact_Organization: University of Florida

Contact_Address:

Address_Type: mailing address

Address: 3205 College Avenue

City: Davie

State_or_Province: FL

Postal_Code: 33314-7719

Contact_Voice_Telephone: 954 577-6382

Contact_Electronic_Mail_Address: kchart@ufl.edu

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: Greater Everglades region

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 402

Column_Count: 284

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 17

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -81

Latitude_of_Projection_Origin: 0

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: Row and Column

Coordinate_Representation:

Abscissa_Resolution: 400

Ordinate_Resolution: 400

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: 1

Altitude_Distance_Units: centimeters

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The CF-compliant metadata in the header of the NetCDF file provides spatial information for projecting the data into a GIS as well as the start date and time step for the time-series of data in the file. It also provides information about the conventions used for attributes in the dataset and the source software used to create the dataset.

Entity_and_Attribute_Detail_Citation:

NetCDF Climate and Forecast (CF) Metadata Conventions, Version 1.0, 28 October, 2003 at <http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.0/>

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Heather S.Henkel

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address

Address: 600 Fourth St. South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 ext 3028

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: hhenkel@usgs.gov

Resource_Description: EDEN DEM in centimeters

Distribution_Liability: The data have no explicit or implied guarantees.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: netCDF

Format_Version_Number: CF-1.0

Format_Specification: .zip

Format_Information_Content: The file contains the elevations in centimeters

File_Decompression_Technique: The files must be unzipped before use

Transfer_Size: 0.462

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://sofia.usgs.gov/eden/data/dem/eden_dem_cm_nov07.nc>

Access_Instructions: The data may be downloaded from the SOFIA website

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20071120

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Heather Henkel

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

Address: 600 Fourth Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727 803-8747 ext 3028

Contact_Facsimile_Telephone: 727 803-2030

Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
Generated by mp version 2.8.18 on Wed Nov 21 15:30:59 2007