48395 2009_humboldt_DMC Data Set Published / External 47842 Imagery Project Completed 2009 This data set consists of 0.5-meter pixel resolution, four band orthoimages covering the Humboldt Bay area. An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. Each orthoimage provides imagery over a DOQQQ with a 100-meter image overlap between adjacent files. The projected coordinate system is UTM Zone 10 North with a NAD83 datum. This data depicts geographic features on the surface of the earth. It was created to provide easily accessible geospatial data which is readily available to enhance the capability of Federal, State, and local emergency responders, as well as plan for homeland security efforts. This data also supports The National Map. 11350 Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY Theme ISO 19115 Topic Category imageryBaseMapsEarthCover Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA Instrument Global Change Master Directory (GCMD) Instrument Keywords CAMERAS Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Theme 0.5 meter orthoimage Theme Remotely Sensed Imagery/Photos Theme four band orthophoto Theme image map Theme orthoimage Theme orthophoto Theme rectified image Theme rectified photograph Office for Coastal Management Charleston SC Data Set As Needed Map (digital) Four band orthoimagery is organized in four color bands or channels which represent the red, green, blue and near infrared portions of the spectrum. Each image pixel is assigned a quadruplet of numeric values, one for each color band. Numeric values range from 0 to 4095. Areas where data is incomplete due to lack of full image coverage are represented with the numeric value of 0. U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. These photographs were obtained for use by the OCM during the course of its development of potential products to fulfill its statutory mission. Although OCM is making these photographs available to others who may find the photographs of value, OCM does not warrant, endorse, or recommend the use of these photographs for any given purpose. OCM is providing these photographs "as is," and OCM disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will OCM be liable to you or any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data. Produced by Photo Science, Inc for the Office for Coastal Management of the National Oceanic and Atmospheric Administration Data Steward 2009 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2009 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2009 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2009 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -124.408105 -123.998331 40.969971 40.529959 Discrete 2009-06-27 Unclassified None. Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these photos in a report, publication, or presentation. https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=397 Customized Download Create custom data files by choosing area, map projection, file format, etc. https://coastalimagery.blob.core.windows.net/digitalcoast/HumboldtBayCA_2009_397/index.html Bulk Download Simple download of data files. https://coast.noaa.gov/digitalcoast Online Resource 2016-05-23 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2018-02-08 Partial upload of Positional Accuracy fields only. 2018-03-13 Partial upload to move data access links to Distribution Info. ArcGIS 9.3.1; MicroStation v7; Z/I Imaging ISAT 5.3 and Orthopro 5.3 Radiometry is verified by visual inspection of the digital orthophoto. Slight systematic radiometric differences may exist between adjacent orthoimage files. These are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching. The horizontal positional accuracy and the assurance of that accuracy depend, in part, on the accuracy of the data inputs to the rectification process. The location of existing photoidentifiable ground control and aerotriangulation points were evaluated on the GeoTIFF image and compared with their ground values in order to determine an overall accuracy for each test block of orthoimages within the project. After image coordinate measurement was completed for each block, an RMSE for the diagonal error was calculated for the orthoimages within the block. This value is an estimate of the horizontal accuracy of the tile expressed in meters.; Quantitative Value: 0.948 meters, Test that produced the value: Federal Geographic Data Committee, 1998, Geospatial Positioning Accuracy Standard, Part 3, National Standard for Spatial Data Accuracy, FGDC-STD-007.3-1998 Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free. Photography was flown during leaf-off in deciduous vegetation regions. Imagery along the eastern margin of the urban area coverage and falling outside of the urban area may contain some void areas. These void areas have a radiometric value of 0 (black). All GeoTIFF tagged data and image file sizes are validated using commercial GIS software to ensure proper loading before being archived. This validation procedure ensures correct physical format and field values for tagged elements. Seamlines and tile edges are visually inspected. Seamline mismatches are not corrected unless the overall displacement exceeds one meter. Aerotriangulation Discrete 2009-09-01 Aerotriangulation provides the exterior orientation parameters (X, Y, Z, omega, phi, kappa) for input to the orthorectification process. | Type of Source Media: disc Airborne GPS Discrete 2009 Provides initial photo station positions to control aerotriangulation. | Type of Source Media: disc Control Discrete 2009 Provides ground coordinates used as reference for ABGPS and quality check for Orthophotographs. | Type of Source Media: disc Raw Frames Discrete 2009-06-27 Source imagery for orthorectification process | Source Geospatial Form: remote-sensing image | Type of Source Media: disc USGS 10m National Elevation Dataset 2001-01-01 Range 1950 1954 Used to provide ground elevations for orthorectification process. | Type of Source Media: CD-ROM 1 The rectification process requires, as input, a digital elevation model (DEM) gridded to user-specified bounds, a digital image file (PHOTO), and external orientation parameters for the aerial photograph which are typically derived from aerotriangulation (ATCONTROL). Four band imagery was collected at a flight elevation of 20,000 feet. Airborne GPS positions were computed by Photo Science, Inc. and used as control in the aerotriangulation process. The aerial images, AGPS data, ground check point data, and camera calibration data were used as inputs to the aerotriangulation process. ISAT 04.05 was used to perform block adjustments and generate exterior orientation parameters for each photo. The external orientation parameters were used to provide the geospatial control each photograph during orthorectification. Vertical control for the orthorectification process was obtained from existing USGS Digital Elevation Models (DEM). During the orthorectification process, elevation data were extracted and resampled to meet user-specified intervals and bounds. The orthorectified imagery is resampled to a 0.5 meter ground resolution with a ground extent of a DOQQQ, with 100-meter image overlap. Each DOQQQ orthoimage was generated from a mosaic created from multiple photographs. Orthoproduction was performed using the Intergraph Ortho Pro 4.4.18. Seamlines were Manually Generated and tone balanced between frames prior to cutting out into DOQQQ products. The orthorectified imagery is georeferenced to UTM zone 14, NAD83, meters. All orthoimages are individually inspected for content, misalignments along mosaic seamlines, and void areas. Source information was collected and verified manually during the production process. 2009-01-01T00:00:00 gov.noaa.nmfs.inport:48395 Anne Ball 2017-11-14T14:46:24 Brianna Key 2024-02-05T17:15:41 2024-02-05 Office for Coastal Management OCM 1002 Public No No 2018-03-13 1 Year 2019-03-13