Orthorectification and Mosaicking of Color Aerial Photography for the Main Eight Hawaiian Islands: Niihau (115-0511)

Metadata Updated: March 11, 2021

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.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date March 11, 2021
Metadata Updated Date March 11, 2021
Data Update Frequency irregular

Additional Metadata

Resource Type Dataset
Metadata Created Date March 11, 2021
Metadata Updated Date March 11, 2021
Publisher National Oceanic and Atmospheric Administration(NOAA), National Ocean Service (NOS), National Centers for CoastalOcean Science (NCCOS), Center for Coastal Monitoring and Assessment(CCMA), Biogeography Branch (Point of Contact)
Unique Identifier Unknown
Maintainer
Identifier Orthorectification and Mosaicking of Color Aerial Photography for the Main Eight Hawaiian Islands: Niihau (115-0511)
Language en-US
Data Last Modified 2002-01-02
Public Access Level public
Data Update Frequency irregular
Bureau Code 006:48
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Old Spatial {"type": "Polygon", "coordinates": -160.2507, 21.8787, -160.1257, 21.8787, -160.1257, 21.9968, -160.2507, 21.9968, -160.2507, 21.8787}
Program Code 006:055
Source Datajson Identifier True
Source Hash bc087d80474d0af7740589601b642f587abdfd5d
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -160.2507, 21.8787, -160.1257, 21.8787, -160.1257, 21.9968, -160.2507, 21.9968, -160.2507, 21.8787}

Didn't find what you're looking for? Suggest a dataset here.