38676
Orthorectification and Mosaicking of Color Aerial Photography for the Main Eight Hawaiian Islands: Maui (301e-0603)
301e-0603
Data Set
Published / External
37187
Hawaii_images_2000
Project
Completed
2002-01-02
Habitat maps of the main Hawaiian Islands were created by visual interpretation of aerial photos and hyperspectral imagery using the Habitat Digitizer extension. Aerial photographs are valuable tools for natural resource managers and researchers since they provide an excellent record of the location and extent of habitats. However, spatial distortions in aerial photographs due to such factors as camera angle, lens characteristics, and relief displacement must be accounted for during analysis to prevent incorrect measurements of area, distance, and other spatial parameters. These distortions of scale within an image can be removed through orthorectification. During orthorectification, digital scans of aerial photos are subjected to algorithms that eliminate each source of spatial distortion. The result is a georeferenced digital mosaic of several photographs with uniform scale throughout the mosaic. Features near land are generally georeferenced with greater accuracy while the accuracy of features away from land is generally not as good. Where no land is in the original photographic frame only kinematic GPS locations and image tie points were used to georeference the images. After an orthorectified mosaic is created, photointerpreters can accurately and reliably delineate boundaries of features in the imagery as they appear on the computer monitor using a software interface such as the Habitat Digitizer.
The National Ocean Service is conducting research to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities.
500
Theme
ISO 19115 Topic Category
environment
Theme
ISO 19115 Topic Category
imageryBaseMapsEarthCover
Theme
NOS Data Explorer Topic Category
Environmental Monitoring
Theme
NOS Data Explorer Topic Category
Remotely Sensed Imagery/Photos
Theme
SAV
Theme
aerial photography
Theme
benthic
Theme
coral
Theme
habitat
Theme
mangrove
Theme
oceans
Theme
reef
Theme
seagrass
Spatial
Hawaii
Spatial
Maui
Spatial
U.S. Exclusive Economic Zone
Spatial
United States
National Centers for Coastal Ocean Science
Silver Spring
MD
Data Set
None Planned
remote-sensing image
The National Oceanic and Atmospheric Administration (NOAA) National Centers for Coastal Ocean Science(NCCOS) produced this data CD-ROM. NCCOS Biogeography Program doesnot guarantee the accuracy of the geographic features or attributes.
Data Steward
2002-01-02
Position
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Distributor
2002-01-02
Position
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Metadata Contact
2002-01-02
Position
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Point of Contact
2002-01-02
Position
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
Principal Investigator
2002-01-02
Person
Battista, Tim
tim.battista@noaa.gov
Ground Condition
-156.7073
-156.6188
21.0836
20.9596
Discrete
2000
Yes
Unclassified
Project information is available online or on CD-ROM through the NCCOS Biogeography Program.;
None
None
http://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/mosaics/301e-0603-airphotos.zip
Downloadable Data
MrSID
SID-MrSID/Multiresolution Seamless Image DB
http://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/
Online Resource
http://ccma.nos.noaa.gov/products/biogeography/hawaii_cd/data/mauifl.aspx
Online Resource
http://coastalscience.noaa.gov/datasets/ccma/biogeo/hawaii/mosaics/301e-0603-airphotos.zip
Online Resource
2013-12-23
Date that the source FGDC record was last modified.
2017-04-05
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2017-09-13
Partial upload of Spatial Info section only.
2017-11-01
Replaced entire Lineage section to populate new Source Contribution field.
2018-02-08
Partial upload of Positional Accuracy fields only.
Microsoft Windows 2000 Version 5.0(Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700
Average spatial accuracy of individual photomosaics is reported in Chapter 3 of Benthic Habitats of the Main Hawaiian Islands. Positional accuracy was determined by solution of Softplotter generated model (RMS less than 1) and by comparison to independent ground control data. The georegistration of these photographs is at least 95% sigma RMS of 5 meters.
Cloud Cover: 2
No color balancing was attempted since this alters color and textural signatures in the original imagery and interferes with the photointerpreter's ability to delineate habitats. As a result mosaics have visible seams between adjacent photos. This provides the photointerpreter with "true color" imagery for maximum ability to identify and delineate benthic features.
Once all of the photographs were orthorectified, the best segments of each photograph were selected for creation of the final mosaic. Segments of each photograph were selected to minimize sun glint, cloud interference, and turbidity in the final mosaic. Where possible, parts of images obscured by sunglint or clouds were replaced with cloud/glint free parts of overlapping images. As a result, most mosaics have few or no clouds or sun glint obscuring bottom features.
Color Aerial Photographs Main Hawaiian Islands Collected by NOAA Year 2000
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS),National Geodetic Survey (NGS)
2000-01-01
Discrete
2000
24000
http://ccma.nos.noaa.gov/products/biogeography/mapping/dems/
Photographs were scanned and orthorectified. | Source Geospatial Form: remote-sensing image | Type of Source Media: paper
digital elevation models
United States Geological Survey
2001-11-01
Discrete
2001
http://ccma.nos.noaa.gov/products/biogeography/mapping/dems/
Elevation data was used to correct for relief displacement in the photographs. | Source Geospatial Form: vector digital data | Type of Source Media: cartridge tape
ground control points
Analytical Laboratories of Hawaii
2002-01-01
Range
2001
2002
Fixed ground features visible in the scannedphotos were selected for GCPs which were then used to georeferencethe imagery | Source Geospatial Form: vector digital data | Type of Source Media: various media
1
Aerial photographs were acquired for the main Hawaiian Islands Benthic Mapping Project in 2000 by NOAA Aircraft Operation Centers aircraft and National Geodetic Survey cameras and personnel. Approximately 1,449, color 9x9 inch photos were taken of the coastal waters of the main Hawaiian Islands at a 1:24,000 scale. Prints and diapositives were created from the original negatives. Diapositivies were then scanned at a resolution of 500 dpi using a photogrammetric quality scanner, yielding one by one meter pixels for the 1:24,000 scale photography. All scans were saved in TIFF format for the purposes of orthorectification and photointerpretation. Georeferencing/Mosaicking of the TIFFs was performed using a variety of softcopy photogrammetric software including Socet Set Version4.2.1, Autometric Softplotter, PCI OrthoEngine, and Erdas OrthoBASE. First, lens correction parameters were applied to each frame to eliminate image distortion. Airborne kinematic GPS was then used, to provide first order georegistration. Image to image tie-points were then used to further co-register the imagery, especially for photos taken over open water when ground control points were not available. Fixed ground features visible in the scanned photos were selected for ground control points (GCPs)which were then used to georeference imagery. GCPs were measured using a Differentially-corrected Global Positioning System (DGPS). We obtained points with a wide distribution throughout the imagery, especially on peninsulas and outer islands whenever possible since this results in the most accurate registration throughout each image. Only ground control points for terrestrial features were collected due to the difficulty of obtaining precise positions for submerged features. Pre-existing USGS 10-meter digital elevation models were used to correct for relief displacement
2002-01-01T00:00:00
gov.noaa.nmfs.inport:38676
Tyler Christensen
2017-04-05T12:48:11
SysAdmin InPortAdmin
2023-10-17T16:12:10
2018-02-08
National Centers for Coastal Ocean Science
NCCOS
1002
Public
No
2018-02-08
1 Year
2019-02-08