1998 Hurricane Mitch Honduras Habitat Data for the Islas de la Bahia and Northern coastal region.
Entry ID: usgs_nwrc_islasdelabahia

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Summary
Abstract: This data set consists of digital data describing wetland (including seagrass
habitat) and upland habitats in the northern coastal areas of Honduras affected
by Hurricane Mitch in October 1998. The data set includes specifically the
islands north of the country: Guanaja and Roatan. Wetlands were classified
using the Cowardin, et al., wetland classification scheme to the level of
salinity modifiers. Uplands were classified using a customized classification
scheme which can be cross-referenced to Anderson, et al.,. The purpose of the
data set is to provide habitat information for restoration and management
effects.

Cartographic phase - EROS High altitude natural color aerial photographs were
photo interpreted for wetland and upland habitat classifications. The photos
were interpreted using a Bausch and Lomb stereoscope at 10x magnifications.
Habitat layer was overlaid on NWRC reprojected NIMA base maps, compiled at
1:25,000. Cartographic work was performed using a Zoom Transfer Scope, and
magnification varied according to source material scale. All cartographic and
photointerpretation processes adhere to NWI standards.

Digitizing phase - Mylar overlays were manually digitized
using an Altek Datatab digitizer to capture the data at a resolution of at
least 0.001 inches.
Four control points corresponding to the four corners of the quadrangle were
used for registration during data collection. Cover type features continuing
onto adjacent quadrangles were adjusted to intersect the quad boundary at a
common, coincident node. Attributes were assigned as the data were digitized,
or in an editing session after the digitizing was completed.

Related URL
Link: VIEW EXTENDED METADATA


Geographic Coverage
 N: 16.57452 S: 16.33113  E: -85.75294  W: -86.37753

Data Set Citation
Dataset Originator/Creator: U.S. Geological Survey, Biological Resources Division, National Wetlands Research Center
Dataset Title: 1998 Hurricane Mitch Honduras Habitat Data for the Islas de la Bahia and Northern coastal region.
Dataset Release Place: Lafayette, Louisiana
Dataset Publisher: USGS, BRD, National Wetlands Research Center
Data Presentation Form: Digital vector data


Temporal Coverage
Start Date: 1998-01-01
Stop Date: 1998-12-31


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
CONTINENT > NORTH AMERICA > CENTRAL AMERICA > PANAMA


Data Resolution
Latitude Resolution: .61 meters
Longitude Resolution: .61 meters


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >WETLANDS    [Definition]
TERRESTRIAL HYDROSPHERE >SURFACE WATER >WETLANDS    [Definition]
OCEANS >COASTAL PROCESSES >CORAL REEFS    [Definition]
OCEANS >COASTAL PROCESSES >MARSHES    [Definition]
BIOLOGICAL CLASSIFICATION >PLANTS >ANGIOSPERMS (FLOWERING PLANTS) >MONOCOTS >SEAGRASS
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >WETLANDS >ESTUARINE WETLANDS    [Definition]
BIOSPHERE >AQUATIC ECOSYSTEMS >WETLANDS
BIOSPHERE >AQUATIC ECOSYSTEMS >WETLANDS >ESTUARINE WETLANDS


ISO Topic Category
BIOTA
GEOSCIENTIFIC INFORMATION
INLAND WATERS
OCEANS


Quality
The attribute accuracy was tested using several methods during the data
development phases and completion. During the interpretation phase, quality
checks were performed at every stage. At the digitizing phase, data was tested
by manual comparison of the source with hard copy printouts and/or symbolized
display of the digital wetlands data on an interactive computer graphic system.
Exact tolerances vary with coverages, as does the date of the processing and
testing. Data has been checked and verified against original maps.

This logical consistency report includes information about both general and
specific topological tests and data generation dynamics in the fidelity of
data. Data is inherently polygonal. Polygons intersecting the neatline are
closed along the border. Segments making up the outer and inner boundaries of a
polygon tie end-to-end to completely enclose the area. Line segments are a set
of sequentially numbered coordinate pairs. No duplicate features exist nor
duplicate points in a data string. Intersecting lines are separated into
individual line segments at the points of intersection. Point data are
represented by two sets of coordinate pairs, each with the same coordinate
values. All nodes are represented by a single coordinate pair which indicates
the beginning or end of a line segment. The neatline for each quad is generated
by connecting four corners of a digital file, as established during
initialization of the digital file. All data crossing the neatline are clipped
to the neatline and data within a specified tolerance of the neatline are
snapped to the neatline.
All photo-interpretable wetlands are identified and mapped using standard
methodologies and equipment for the photo interpretation phases of the data
development. In the upland areas, 1/4 acre wetlands generally are mapped. In
coastal marsh, swamps, and bottomland hardwood areas, small open water and
emergent wetlands are mapped. In general, the minimum mapping unit is from 1 to
3 acres depending of the wetland type and the scale and emulsion of the source
aerial photography. Some small wetlands, densely broken marsh, and those
wetlands obscured by dense forest cover may not be included in this data set.
Processing of the digital data also follows conventions and standard
methodologies for the time period and within limitations of available
workstation equipment at the date of data development. Processing follows
standard operating procedures as used, developed, and shared by the National
Wetlands Inventory of the U.S. Fish and Wildlife Service. Data products were
completed using similar systems and methodologies which are used by NWI and by
USGS.
For reference points accuracy, the accuracy for the digital data are tested by
visual comparison of the source with hard copy maps, and by understanding of
the hardware tolerances and processing values reported by the software used in
data development. Additional checks on comparison were possible when
georeferencing/rectification was done using the USGS maps, which cite National
Mapping Accuracy Standard compliance.


Access Constraints
It is strongly recommended that this data is directly acquired from the
distributor described above or from another USGS Biological Resources
Division server and not indirectly through other sources which may
have changed the data in some way. The distributor makes no claims as
to the data's suitability for other purposes.


Use Constraints
Acknowledgement of the U.S. Geological Survey, National Wetlands Research
Center as a data source would be appreciated in products developed from these
data, and such acknowledgment as is standard for citation and legal practices
for data source is expected by users of this data. Sharing new data layers
developed directly from these data would also be appreciated by NWRC staff.
Users should be aware that comparison with other data sets for the same area
from other time periods may be inaccurate due to inconsistencies resulting from
changes in mapping conventions, data collection, and computer processes over
time. The distributor shall not be liable for improper or incorrect use of this
data, based on the description of appropriate/inappropriate uses described in
this metadata document. These data are not legal documents and are not to be
used as such.


Keywords
Hurricane Mitch
wetlands
habitats
uplands
coast
coastal
coral reefs
coastal habitats
seagrass
geographic information system data
classified aerial photography
maps
mapping
National Wetlands Inventory
Gulf of Honduras
Honduras
Islas de la Bahia
Roatan
Guanaja
1998


Data Set Progress
COMPLETE


Data Center
Spatial Data and Metadata Server, National Wetlands Research Center, Biological Resources Division, USGS, U.S. Department of the Interior    [Information]
Data Center URL: http://sdms.cr.usgs.gov/

Data Center Personnel
Name: CHRISTOPHER CRETINI
Phone: 337-266-8621
Fax: 318 266-8513
Email: christopher_cretini at usgs.gov
Contact Address:
National Wetlands Research Center
Biological Resources Division
U.S. Geological Survey
700 Cajundome Boulevard
City: Lafayette
Province or State: LA
Postal Code: 70506
Country: USA


Personnel
LARRY HANDLEY
Role: INVESTIGATOR
Phone: 337-266-8691
Fax: 337-266-8513
Email: larry_handley at usgs.gov
Contact Address:
U.S. Geological Survey, Biological Resources Division,
National Wetlands Research Center
700 Cajundome Blvd
City: Lafayette
Province or State: Louisiana
Postal Code: 70506
Country: USA


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2003-06-25
Last DIF Revision Date: 2014-04-11
Future DIF Review Date: 2004-06-29

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