Dataset Identification:
Resource Abstract:
- description: This is the 1st 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). 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 southern portion of the Big Cypress National Preserve (BCNP)
and the northwestern corner of the Everglades National Park (ENP) has been filled. Third, to increase accuracy in Water Conservation
Area 1 (WCA1), the most challenging EDEN subarea from an elevation modeling standpoint, the Conservation area is subdivided
into 3 zones (North, Central, South). Boundaries between the North, Central and South zones are based upon landscape units
defined in 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.
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 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. 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 based on nearby cell values. 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 the 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.; abstract: This is the 1st 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). 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 southern
portion of the Big Cypress National Preserve (BCNP) and the northwestern corner of the Everglades National Park (ENP) has
been filled. Third, to increase accuracy in Water Conservation Area 1 (WCA1), the most challenging EDEN subarea from an elevation
modeling standpoint, the Conservation area is subdivided into 3 zones (North, Central, South). Boundaries between the North,
Central and South zones are based upon landscape units defined in 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. 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 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. 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 based on nearby cell values. 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 the 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.
Citation
- Title Everglades Depth Estimation Network (EDEN) January 2010 Digital Elevation Model (DEM).
-
- creation Date
2018-05-21T11:28:02.959255
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Metadata data stamp:
2018-08-06T20:48:09Z
Resource Maintenance Information
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- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T20:48:09Z
Metadata contact
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pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
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- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:1c5b485f-c2af-4d40-aeee-154db6128228
Metadata record format is ISO19139 XML (MD_Metadata)