Hogrefe Natural Systems Analysis in collaboration with
Davey Jones Locker GIS Laboratory, Oregon State Universtiy for
Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries
Science Center, Pacific Islands Benthic Habitat Mapping Center
20090221
Mosaic of 10 m gridded multibeam bathymetry and bathymetry derived from multispectral IKONOS satellite imagery of Maug Island, Commonwealth of the Northern Marianas Islands, USA
raster digital data
http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_mau_bathy.htm
Gridded multibeam bathymetry is integrated with bathymetry
derived from multpectral IKONOS satellite data. Gridded (5m and 10 m cell
size) multibeam bathymetry collected aboard NOAA Ship Hiialaka'i and
R/V AHI. Bathymetry values shallower than 25 m were derived by
gauging the relative attenuation of blue and green spectral radiance
as a function of depth. A multiple linear regression analysis of
linearized blue and green band spectral values against depth determined
the variables of y-intercept, blue slope and green slope values.
Variables then used in multivariate slope intercept formula to derive
depth. Variables were adjusted to improve the statistical accuracy and
spatial coverage of the final derived bathymetry product. Digital image
processing to derive depths conducted with the ENVI 4.5 software program
while data editing and integration was performed using ArcGIS 9.3. This
dataset is for the shelf environment of Maug Island, Commonwealth of
the Northern Marianas Islands, USA
The data were derived in support of NOAA Coral Reef Conservation
Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems.
This data set specifically addresses Objective 1 and 4: to develop
high-resolution benthic maps and to characterize priority deep
water reefs and associated habitats. This integration of derived
bathymetry with multibeam sonar data provides a GIS layer with
expanded spatial coverage that may be used for benthic and essential
fish habitat characterization, and for the study of geologic features.
By combining the dataset with other bathymetry, backscatter, derivatives,
and in situ data, they collectively compose benthic habitat maps
designed to be used to understand and predict shallow depth (0m to 150m)
benthic habitats for organisms that inhabit coral reef ecosystems.
Gridded multibeam data were collected aboard the Hi'ialakai, a 218'
United States National Oceanographic and Atmospheric Administration
(NOAA) research ship, and aboard the R/V AHI (Acoustic Habitat
Investigator), a 25' survey launch owned and operated by the NOAA
Pacific Islands Fisheries Science Center in Honolulu, HI. The
metadata for the bathymetry is documented in the product metadata,
maug_10m.txt.
http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/cnmi-guam/maug-island/
Original IKONOS imagery was purchased to support the Pacific Islands
Geographic Information System (GIS) project and National Ocean Service's
(NOS) coral mapping activities. Orthographically corrected IKONOS Imagery
was provided by NOAA's National Centers for Coastal Ocean Science, Center
for Coastal Monitoring and Assessment. The metadata for this IKONOS
imagery is documented in the original product metadata, po_123016_metadata
(http://www.soest.hawaii.edu/pibhmc/)
20030912
20070608
ground condition
As needed
145.186258
145.263881
20.068531
19.989271
NCEI Geoportal FilterCoRIS_MetadataCRCP ProjectBenthic Habitat Mapping and Characterization - Commonwealth of the Northern Mariana Islands and Guam1398
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > IKONOS
None
Slope
Bathymetry
Multibeam sonar
ISO 19115 Topic Category
elevation
006
CoRIS Discovery Thesaurus
Geographic Information > Bathymetry
None
Maug Island
Commonwealth of the Northern Marianas Islands
United States of America
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Maug Island > Maug Island (20N145E0001)
COUNTRY/TERRITORY > Northern Mariana Islands > Maug > Maug Island (20N145E0001)
CoRIS Region
CNMI
None
These data are not to be used for navigation
purposes. Please acknowledge NOAA Pacific Islands Fisheries
Science Center, the Joint Institute for Marine and
Atmospheric Research (JIMAR) University of Hawaii and Davey
Jones Locker GIS Laboratory Oregon State University as the
sources of this information.
http://www.soest.hawaii.edu/pibhmc/CNMI_images/Mau_bathymetry_mb&IKONOS_445.jpg
Gridded Bathymetry
jpeg
NOAA PIFSC CRED, the Pacific Islands Benthic Habitat
Mapping Center and Davey Jones Locker GIS Laboratory
Oregon State University
Not applicable
Unclassified
Not applicable
ArcGIS ASCII file or ArcGIS Grid file,
bathymetry derived from 4x4m multispectral satellite imagery (IKONOS)
using ENVI 4.5, multibeam and derived bathymetry were integrated using
ArcGIS 9.3
Data are collected for resource
management and research purposes and are tested for
internal consistency; however, no effort is made to compare
these data to external references or to other published data.
These data are believed to be logically
consistent though no tests were performed
Complete
Horizontal positioning system: GPS C/A
Horizontal position accuracy: 25 meters
Range resolution of sonar: varies with depth
Raw sounding resolution: varies with depth
Vertical accuracy of gridded sonar product: ~ 1% of water depth
Vertical accuracy of derived bathymetry product: 5 meter range
Multiple tools in ENVI 4.5 were used to complete the following
processing steps: Data conversion from digital number to radiance,
correction for atmosphere and water surface reflection,
linearization of spectral decay as function of depth, masking of
non-applicable values, and bathymetric derivation using variables
from multiple linear regression analysis. Multiple tools in
ArcGIS 9.3 were used for dataset integration and to extract values
for the multiple linear regression analysis and subsequent error
analyses. Depth data were extracted from 5m resolution gridded multibeam
sonar. The statisitcs program S-Plus was used for the multiple
linear regression analysis to provide original variables for depth
derivation. The multivariate slope intercept formula used to
derive depth was Depth=Yint+(Mblue)(Xblue)+(Mgreen)(Xgreen). Two
derived products from the image maug_123016_msi_rat.pix (Mau016) were
integrated to expand spatial coverage.
The original MLR variables for Mau016 were Yint=6.3909,
Mblue=-18.9044, and Mgreen=35.4572. The product derived from these
variables (Mau016_DB) was mosaiced with the product derived using
reduced linearized blue and green band slope values of -15.9044 and
32.4572 (Mau016_DB3) to increase coverage in shallow areas. Data
from Mau016_DB replaced concurrent data from Mau016_DB3 during
integration due to better statistical accuracy.
This mosaiced derived bathymetry product (Mau_DBall) was then resampled
from 4m to 10m resolution and integrated with 10m resolution multibeam
sonar data, with the sonar data prioritized over derived data, to
create the final product (Mau_DBMB_10m).
Additional description of all processing steps is available at:
http://oregonstate.edu/~hogrefek/Cookbook/Cookbook_042108.pdf
An error analysis of each derived bathymetry grid used is available
upon request.
20090220
Raster
Pixel
869
803
1
Universal Transverse Mercator
55
0.999600
147.000000
0.000000
500000.000000
0.000000
Row and Column
10.000000
10.000000
meters
D_WGS_1984
WGS_1984
6378137.000000
298.257224
NOAA PIFSC CRED PIBHMC and DJLab OSU
Kyle Hogrefe
mailing and physical address
104 Wilkinson Hall, Oregon State University
Corvallis
Oregon
97331
USA
541-749-8444
hogrefek@geo.oregonstate.edu
Downloadable Data
These data are not to be used for navigational purposes.
NOAA makes no warranty regarding these data, expressed or implied,
nor does the fact of distribution constitute such a warranty.
NOAA cannot assume liability for any damages caused by any errors
or omissions in these data, nor as a result of the failure of
these data to function on a particular system.
Arc Grid
Arc Grid can be opened directly using
ArcMap or ArcCatalog.
http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_mau_bathy.htm
None
20190605
20091222
Kyle Hogrefe
NOAA PIFSC CRED PIBHMC and DJLab OSU
mailing and physical address
104 Wilkinson Hall, Oregon State University
Corvallis
Oregon
97331
USA
541-740-8444
hogrefek@geo.oregonstate.edu
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Universal Time
None
None
20091222080150
None
20030912
20070608
https://www.coris.noaa.gov/metadata/records/html/mau_db_10m_metadata.html
4386