United States Army Corps of Engineers
20080217
2006-2007 natural color orthophotos covering the islands of Puerto Rico, Culebra, Vieques, St. Thomas, St. John, and St. Croix
remote-sensing image
401 Dividend Drive, Suite K, Peachtree City, GA 30269
3001, Inc.
https://coast.noaa.gov/dataviewer
https://coast.noaa.gov/htdata/raster1/imagery/PuertoRico_RGB_2007_394
https://coast.noaa.gov/dataviewer/#/imagery/search/where:ID=394
https://coast.noaa.gov/digitalcoast
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.
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.
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).
20071031
Date of image acquisition
None Planned
-67.338055
-64.473611
18.626111
17.591666
ISO 19115 Topic Category
imageryBaseMapsEarthCover
None
Remotely Sensed Imagery/Photos
framework
orthoimage
None
Puerto Rico
U.S. Virgin Islands
Culebra
Vieques
None
None. Acknowledgment of the United States Army Corps of Engineers would be appreciated for products derived from these data.
U.S. Army Corps of Engineers
Mailing Address
1222 Spruce Street
St. Louis
MO
63103-2833
US
314-331-8385
314-331-8071
Robert.D.Mesko@mvs02.usace.army.mil
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.3.0.800
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.
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.
The accuracy value was determined by measuring photo-identifiable control points collected with GPS survey methods in the orthophotos.
5.00
ASPRS Class I Standard for 200 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf
10.0
ASPRS Class I Standard for 400 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf
3001, Inc.
20080217
Digital Aerial Imagery for 2006-2007 PRVI Orthophotography
(Select One)
401 Dividend Drive, Suite K, Peachtree City, GA 30269
3001, Inc.
Additional Information: (770) 631-0903
2400
disc
20071031
Date of image acquisition
dig_aer_img
Flight planning, image acquisition, image processing and image packaging.
RLDA
20070115
Ground Control for 2006-2007 PRVI Orthophotography
(Select One)
PO Box 41033, San Juan, Puerto Rico, 00940
RLDA
Additional Information: (787)268-6097
2400
disc
20061101
Date ground control was collected
photo_control
Horizontal and vertical control used to establish positions and elevations for reference and correlation purposes and as input to the aerotriangulation process.
3001, Inc
20050201
DEM for Orthorectification of 2006-2007 PRVI Orthophotography
raster digital data
401 Dividend Drive, Suite K, Peachtree City, GA 30269
3001, Inc.
Additional Information: (770) 631-0903
2400
disc
20050201
Date DEM was processed by 3001, Inc.
ortho_dem
Ground elevations used for orthorectification process
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.
dig_aer_img
photo_control
ortho_dem
20080217
Peter Briere
3001, Inc
mailing and physical
401 Dividend Drive, Suite K
Peachtree City
GA
30269
(770) 631-0903
(770) 631-0820
pbriere@3001inc.com
8:00 a.m. to 5:00 p.m.
5
Raster
State Plane Coordinate System 1983
5200
18.0333333333333
18.4333333333333
-66.4333333333334
17.8333333333333
200000
200000
coordinate pair
0.3048
0.3048
Meter
D_North_American_1983
GRS_1980
6378137
298.257222101
NOAA Office for Coastal Management
mailing and physical
2234 South Hobson Avenue
Charleston
SC
29405-2413
843-740-1202
coastal.info@noaa.gov
Downloadable Data
Users must assume responsibility to determine the usability of these data.
20160523
20160523
U.S. Army Corps of Engineers
Mailing Address
1222 Spruce Street
St. Louis
MO
63103-2833
US
314-331-8385
314-331-8071
Robert.D.Mesko@mvs02.usace.army.mil
Monday through Friday 8:00 AM to 5:00 PM (Central Time)
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time