Everglades Depth Estimation Network (EDEN) October 2011 Digital Elevation Model (DEM)
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: U.S. Geological survey
- Publication_Date: 201110
- Title:
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Everglades Depth Estimation Network (EDEN) October 2011 Digital Elevation Model (DEM)
- Geospatial_Data_Presentation_Form: raster digital data
- Online_Linkage: <http://sofia.usgs.gov/eden/models/groundelevmod-edenapps.php>
- Description:
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- Abstract:
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This is the 2nd release of the fourth 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. Collectively, these data are referred to as "High Accuracy Elevation Data" (HAED). Inconsistencies in available greater Everglades boundary files resulted in a missing elevation value for 1 cell along the western boundary of WCA3s. In this release, that single cell was "filled" with a value of 2.19682 meters as determined through the kriging process summarized below. As was the case with the 1st release (EDEN_em_JA10), this version differs from the previous elevation model (EDEN_EM_OCT07) in several ways. First, the kriging algorithm applied to newly modeled subareas was changed from ordinary to universal kriging - resulting in slightly lower errors during cross-validation and accuracy assessment. Second, a previously omitted area in the northwestern corner of the Everglades National Park (ENP) and southern portion of Big Cypress National Preserve has been filled. Third, to increase accuracy in WCA1, the most challenging EDEN subarea from an elevation modeling standpoint, the Conservation area is subdivided into 4 zones (Northern, Central, Southwest and Southeast). Boundaries between the North, Central and two Southern zones is based upon landscape units defined through the CERP. The landscape unit representing approximately the southern third of WCA1 was further divided into two zones (east and west) based on marked changes in slope and aspect data generated from a DEM of the southern landscape unit as a whole. Division of WCA1 into 5 zones reduces errors estimated by comparing DEM modeled water depths with those measured by EDEN Principal Investigators in the field. Subdivision of the south landscape unit into east and west zones resulted in lower error estimates for the eastern subzone (i.e., southeast) without significantly affecting (i.e., improving or degrading) the quality of the western subzone - an area where DEM modeling is most challenging. Finally, to reduce artificial breaks in elevation along WCA1 subarea boundaries, models were overlapped by 1 cell at these boundaries and, for the North, Central and South zone boundaries, overlapping model values were averaged. For the boundaries between the Southwest and Southeast zones, cell values were "blended" based on weighted distance from the boundary edge. Finally, points along the North / Central and Central / South zone edges were subjectively selected and changed by adding or subtracting 0.03 meters (3 cm) to particular cells. This slightly reduces apparent artifacts without drastically affecting the integrity of the model. The 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 intended specifically for use in the EDEN applications software. Therefore, it is a modification of the EDEN DEM released in January of 2010 (i.e., eden_em_ja10). The released January 2010 data was modified by converting elevation values from meters (m) to centimeters (cm). In a previous release of this data set (eden_em_cm_ja10-notch) data was removed from the southern Big Cypress National Preserve and northwestern Everglades National Park area so that the DEM boundary matched the EDEN boundary. However, a new version of the EDEN water surface boundary has been released in October 2011, and provided for the release of eden_em_cm_ja10 which has the area of southern Big Cypress National Preserve and northwestern Everglades National Park filled in so that it now matchs the current water surface model in that area. Aside from this difference in units, the following data documentation applies.
- Purpose:
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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:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 1995
- Ending_Date: 201110
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -81.4
- East_Bounding_Coordinate: -80.2
- North_Bounding_Coordinate: 26.7
- South_Bounding_Coordinate: 25.2
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: none
- Theme_Keyword: digital elevation model
- Theme_Keyword: mapping
- Theme_Keyword: DEM
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: elevation
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: 006
- Theme_Keyword: 010
- Place:
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- Place_Keyword_Thesaurus:
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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:
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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:
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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:
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- Place_Keyword_Thesaurus: USGS Geographic Names Information System
- Place_Keyword: Everglades National Park
- Place_Keyword: Big Cypress National Preserve
- Place:
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- 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:
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These data were produced for EDEN operational water depth estimation and applications.
- Use_Constraints:
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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:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: John W. Jones
- Contact_Organization: U.S. Geological Survey
- Contact_Address:
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- 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
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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<http://sofia.usgs.gov/eden/images/maps/EDEN_oc11_release_graphic_lg.gif>
- Browse_Graphic_File_Description: graphic showing the coverage of EDEN_EM_OC11
- Browse_Graphic_File_Type: GIF
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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<http://www.evergladesplan.org/pm/recover/recover_docs/map/MAP_3.1_GE.pdf>
- Browse_Graphic_File_Description:
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p. 3-38 shows the a satellite image with the landscape units of Greater Everglades wetlands to be used for stratified random sampling design
- Browse_Graphic_File_Type: PDF
- Native_Data_Set_Environment: NetCDF file
- Cross_Reference:
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- Citation_Information:
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- Originator: Pamela Telis
- Publication_Date: 2006
- Title:
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The Everglades Depth Estimation Network (EDEN) for support of ecological and biological assessments
- Geospatial_Data_Presentation_Form: fact sheet
- Series_Information:
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- Series_Name: USGS Fact Sheet
- Issue_Identification: 2006-3087
- Publication_Information:
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- Publication_Place: St. Petersburg, FL
- Publisher: U.S. Geological Survey
- Other_Citation_Details: accessed as of 12/29/2009
- Online_Linkage: <http://sofia.usgs.gov/publications/fs/2006-3087/index.html>
- Cross_Reference:
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- Citation_Information:
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- Originator: Jones, J. W.
- Publication_Date: 2001
- Title:
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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:
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- Publication_Place: Wallingford, Oxfordshire, UK
- Publisher: International Association of Hydrological Sciences
- Other_Citation_Details:
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in Remote Sensing and Hydrology 2000, editors Manfred Owe, Kaye Brubaker, Jerry Ritchie, and Albert Rango, publication 267, ISBN 1-901502-46-5
- Cross_Reference:
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- Citation_Information:
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- Originator: Desmond, G. B.
- Publication_Date: 2003
- Title:
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Measuring and mapping the topography of the Florida Everglades for Ecosystem Restoration
- Geospatial_Data_Presentation_Form: fact sheet
- Series_Information:
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- Series_Name: USGS Fact Sheet
- Issue_Identification: 021-03
- Publication_Information:
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- Publication_Place: Reston, VA
- Publisher: U.S. Geological Survey
- Other_Citation_Details: accessed as of 1/11/2010
- Online_Linkage: <http://sofia.usgs.gov/publications/fs/021-03/index.html>
- Cross_Reference:
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- Citation_Information:
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- Originator: U.S> Army Corps of Engineers
- Publication_Date: 2004
- Title:
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RECOVER: Monitoring and Assessment Plan (MAP) 2004 Greater Everglades Wetlands Module
- Geospatial_Data_Presentation_Form: report
- Publication_Information:
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- Publication_Place: Jacksonville, FL
- Publisher: U.S. Army Corps of Engineers
- Other_Citation_Details: accessed as of 2/3/2010
- Online_Linkage:
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<http://www.evergladesplan.org/pm/recover/recover_docs/map/MAP_3.1_GE.pdf>
- Data_Quality_Information:
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- Logical_Consistency_Report:
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The EDEN monitoring network includes ground-elevation measurements and continuous water-level data.
- Completeness_Report:
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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:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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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).
- Lineage:
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- Process_Step:
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- Process_Description:
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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. 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.
For the previous release of the DEM, subarea DEMs were produced using the geostatistical approach called "anisotropic ordinary kriging". This version is composed of new models created for each new EDEN subarea in Water Conservation Area 1 (WCA1). For the latest iteration of the EDEN DEM "anisotropic universal kriging" was employed.
As with the previously released DEM, WCA1 surfaces were produced by removing all "upland" AHF points. However, in this version WCA1 "upland" was defined through a reclassification of the South Florida Water Management Vegetation Map rather than the Florida GAP map.
As the most challenging area from an elevation modeling standpoint, for this revision WCA1 was further subdivided into a total of 4 zones. First, boundaries between the North, Central and two South zones are based upon landscape units defined through the CERP Monitoring and Assessment Plan, Part 1 Figure 3-20 on p. 3-38 (p. 36 in the pdf file) at <http://www.evergladesplan.org/pm/recover/recover_docs/map/MAP_3.1_GE.pdf>. Then the South landscape unit (representing approximately the southern third of WCA1) was further divided into two zones (east and west, termed "Southeast" and"Southwest") based on marked changes in slope and aspect data that were generated from a DEM of the South landscape unit as a whole. Division of WCA1 into 4 zones reduces errors estimated by comparing DEM modeled water depths with those measured by EDEN Principal Investigators in the field. Subdivision of the South landscape unit into east and west zones resulted in lower error estimates for the Southeast zone without significantly affecting (i.e., improving or degrading) the quality of the Southwest zone - an area where DEM modeling is most challenging.
This file is a modification of the eden dem created in January of 2010 (i.e., eden_em_jan10) in which the elevation values have been converted from meters (m) to centimeters (cm) for use by EDEN applications software. Inconsistencies in available greater Everglades boundary files resulted in a missing elevation value for 1 cell along the western boundary of WCA3. In this release, that single cell was "filled" with a value of 219.682 centimeters as determined through the kriging process. This file is intended specifically for use in the EDEN applications software.
- Process_Date: 2011
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: John Jones
- Contact_Organization: U.S. Geological Survey
- 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 the R programming language and ncdf library.
- Process_Date: 201110
- Process_Contact:
-
- 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
- Spatial_Data_Organization_Information:
-
- Indirect_Spatial_Reference: Greater Everglades region
- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Grid Cell
- Row_Count: 405
- Column_Count: 287
- Vertical_Count: 1
- Spatial_Reference_Information:
-
- Horizontal_Coordinate_System_Definition:
-
- Planar:
-
- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- 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:
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- 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_EM_ CM_OC11
- Distribution_Liability: No warrantees are implied or explicit for the data
- Standard_Order_Process:
-
- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: netCDF
- Format_Version_Number: CF-1.0
- Format_Information_Content:
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The file contains the netCDF file for the cm version of the October 2011 EDEN DEM
- File_Decompression_Technique: The file is zipped and must be unzipped before use
- Digital_Transfer_Option:
-
- Online_Option:
-
- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name: <http://sofia.usgs.gov/eden/models/groundelevmod-edenapps.php>
- Access_Instructions: The file may be downloaded from the SOFIA website
- Fees: none
- Metadata_Reference_Information:
-
- Metadata_Date: 20111215
- 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
- Metadata_Access_Constraints: none
- Metadata_Use_Constraints:
-
This metadata record may have been copied from the SOFIA website and may not be the most recent version. Please check <http://sofia.usgs.gov/metadata> to be sure you have the most recent version.
Generated by mp version 2.9.14 on Fri Dec 16 11:53:28 2011
U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather
Henkel - Webmaster