49576
2006-2007 false color infrared orthophotos covering the islands of Puerto Rico, Culebra, Vieques, St. Thomas, St. John, and St. Croix
ads40_pr_cir
Data Set
Published / External
49403
Imagery - partner (no harvest)
Project
Completed
2008-02-17
This file is from a collection of GeoTIFF format natural color and false color infrared orthophotos covering the islands of Puerto Rico, Culebra, Vieques, St. Thomas, St. John, and St. Croix (USVI). An orthophoto is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthophotography combines the image characteristics of a photograph with the geometric qualities of a map. Each orthophoto provides imagery for a standard USGS 1/16th quadrangle map. False color infrared imagery was only generated for those 1/16th quadrangle maps falling within one kilometer of the coast line. The source imagery was obtained from November 2006 through March 2007 and used to produce orthophotos with a one foot ground sample distance (GSD). Imagery was acquired at 0.9 foot GSD resolution. Flight height maintained during mission was 8,650 feet AGL. The imagery was captured at 12-bit radiometric resolution and converted to 8-bit radiometric resolution during post processing. The imagery was captured with 30% sidelap between all adjacent flight lines. The PRVI project area was divided into 20 flight blocks due to necessary base station and flight line length requirements. The imagery was obtained and processed by all digital means beginning with data acquisition using an ADS40 digital sensor. The orthophotos are available in GeoTIFF form. The projected coordinate system is State Plane Puerto Rico / US Virgin Islands (Zone 5200), NAD 83, GRS 80, Units Meters.
Original contact information:
Contact Org: U.S. Army Corps of Engineers
Phone: 314-331-8385
Email: Robert.D.Mesko@mvs02.usace.army.mil
The purpose of the project is to provide the United States Army Corps of Engineers with current year digital orthophotos covering all of Puerto Rico and the US Virgin Islands. The Corps regularly uses digital orthophotos to support regulatory, land management and acquisition, planning, engineering and habitat restoration projects. The data may also become available to local, state and other federal agencies for their specific management and analysis needs. The one-foot resolution data collected for this project is higher resolution than the previous island-wide collection in 2004, which was one-meter resolution.
11976
The data design specifications for this product includes several directed to insure its quality, consistency, and usability. These specifications address some of the technical issues associated with orthoimage production: 1) the tops of buildings and other structures elevated above the surface of the ground 'tilt' away from the center point of the source photography and from their own bases as a result of perspective and their height which is not compensated for in digital elevation models of the ground surface and 2) individual orthoimages may be assembled from several source images (strips).
Theme
ISO 19115 Topic Category
imageryBaseMapsEarthCover
Theme
Remotely Sensed Imagery/Photos
Theme
framework
Theme
orthoimage
Office for Coastal Management
Charleston
SC
Data Set
None Planned
Image (digital)
Users must assume responsibility to determine the usability of these data.
Data Steward
2008-02-17
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
2008-02-17
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
2008-02-17
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
2008-02-17
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
Date of image acquisition
-67.338055
-64.473611
18.626111
17.591666
Discrete
2007-10-31
Yes
Unclassified
None
None. Acknowledgment of the United States Army Corps of Engineers would be appreciated for products derived from these data.
https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=393
Customized Download
Create custom data files by choosing area, map projection, file format, etc.
https://coastalimagery.blob.core.windows.net/digitalcoast/PuertoRico_CIR_2007_393/index.html
Bulk Download
Simple download of data files.
https://coast.noaa.gov/dataviewer
Online Resource
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.
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.3.0.800
The accuracy value was determined by measuring photo-identifiable control points collected with GPS survey methods in the orthophotos.; Quantitative Value: 5.00 meters, Test that produced the value: ASPRS Class I Standard for 200 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf; Quantitative Value: 10.0 meters, Test that produced the value: ASPRS Class I Standard for 400 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf
Cloud Cover: 5
These data cover all of the islands of Puerto Rico, Culebra, Vieques, and the US Virgin Islands. Each orthophoto has an overedge of approximately 30 meters on all sides of its centering 1.875 minute cell.
Sample points taken from overlapping areas of adjacent image strips that contributed image chips to each orthophoto tile are typically consistent to the 2-3 pixel level. This not only ensures that a consistent mosaic can be created from the adjacent image strips acquired with the ADS40 pushbroom scanner but also means that the images have good precision and as a group are spatially self-consistent.
DEM for Orthorectification of 2006-2007 PRVI Orthophotography
2005-02-01
Discrete
2005-02-01
2400
Ground elevations used for orthorectification process | Source Geospatial Form: raster digital data | Type of Source Media: disc
Digital Aerial Imagery for 2006-2007 PRVI Orthophotography
2008-02-17
Discrete
2007-10-31
2400
Flight planning, image acquisition, image processing and image packaging. | Source Geospatial Form: (Select One) | Type of Source Media: disc
Ground Control for 2006-2007 PRVI Orthophotography
2007-01-15
Discrete
2006-11-01
2400
Horizontal and vertical control used to establish positions and elevations for reference and correlation purposes and as input to the aerotriangulation process. | Source Geospatial Form: (Select One) | Type of Source Media: disc
1
Ground control consisted of photo identifiable surveyed points. The imagery was collected at an altitude of 8650 ft using an ADS40 digital sensor. Image quality was verified during the post flight review phase. Factors considered during this review included but were not limited to the presence of smoke and/or cloud cover, contrails, light conditions and sun glint. The triangulated strips were rectified with a recent DEM of the area provided by 3001, Inc. The vertical accuracy of the DEM varies based on the elevation postings and is generally estimated at 30-45cm. The red, green and blue bands were combined to generate a final natural color orthophoto, and the near - infrared, red and green bands were combined to generate a final false color infrared orthophoto. The ADS40 sensor collects twelve bit image data which requires radiometric adjustment for output in standard eight bit image channels. Converting to eight bit results in a reduction of the color range from 4096 to 256 - thus loss of radiometric detail is inevitable. The extra dynamic range of the sensor permits greater object differentiation in shadows and in bright areas. The sixteen bit dynamic range permitted the imagery to be more effectively color balanced than is possible with eight bit imagery. This was accomplished by performing tonal enhancements immediately prior to the reduction from sixteen bit to eight bit data. In addition to color balancing these eight bit images were adjusted to create seamless imagery to the highest extent practically achievable. The imagery was mosaicked using a combination of automated and manual seamlines generation. Project specified tiles were extracted from the mosaic. Final image tiles were reviewed for artifacts and anomalies and adjusted as part of quality control procedures. When necessary, local corrections to the imagery were performed to minimize such effects.
2008-02-17T00:00:00
Digital Aerial Imagery for 2006-2007 PRVI Orthophotography
gov.noaa.nmfs.inport:49576
Anne Ball
2017-11-15T15:15:36
Kirk Waters
2024-01-11T11:52:09
2024-01-11
OCM Partners
OCMP
1002
Public
No
2018-03-13
1 Year
2019-03-13