metadata_18064_c6_sw eng; USA utf8 dataset U.S. Army Corps of Engineers 314-331-8385 314-331-8071 1222 Spruce Street St. Louis MO 63103-2833 US Robert.D.Mesko@mvs02.usace.army.mil Monday through Friday 8:00 AM to 5:00 PM (Central Time) pointOfContact 2024-12-15 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 3 row 11823 column 22014 vertical 1 point North American Datum 1983 NAD83 2007-01-19 revision https://epsg.org/crs_4269/NAD83.html NAD83 Link to Geographic Markup Language (GML) description of reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4269 2007 MrSID Image of St. John Utilized to derive Benthic Habitat Maps (18064_c6_sw.sid) 2008-02-17 publication United States Army Corps of Engineers originator 3001, Inc. 401 Dividend Drive Suite K, Peachtree City, GA 30269 publisher mapDigital This MrSID (.sid) file is an orthophoto mosaic 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. 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 neccessary 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 also available in GeoTIFF form from the distributor. 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 acquistion, 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. completed U.S. Army Corps of Engineers 314-331-8385 314-331-8071 1222 Spruce Street St. Louis MO 63103-2833 US Robert.D.Mesko@mvs02.usace.army.mil pointOfContact notPlanned CoRIS_Metadata theme NCEI Geoportal Filter Map Images > Aerial Photographs theme CoRIS Discovery Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Mapping > Habitat mapping EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Aircraft > Aerial Photography theme CoRIS Theme Thesaurus orthophotograph orthoimage theme none U.S. Virgin Islands St. John place none COUNTRY/TERRITORY > United States of America > U. S. Virgin Islands > St. John > St. John (18N064W0011) OCEAN BASIN > Atlantic Ocean > Caribbean Sea > Virgin Islands > Virgin Islands > St. John (18N064W0011) place CoRIS Place Thesaurus USVI place CoRIS Region Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data. otherRestrictions Use Constraints: None. Acknowledgment of the United States Army Corps of Engineers would be appreciated for products derived from these data. otherRestrictions Access Constraints: None grid eng; USA imageryBaseMapsEarthCover Native Dataset Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.0.1770 -64.750665 -64.686884 18.279416 18.312541 2007-09-01 2007-10-01 The data design specifications for this product includes several directed to ensure its quality, consistency, and useability. 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). Resource Description: The data are being provided on an 'as is' basis. The Corps specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will the Corps or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the Corps has been advised of the possibility of such damages. All data are intended for resource management use. 5 U.S. Army Corps of Engineers 314-331-8385 314-331-8071 1222 Spruce Street St. Louis MO 63103-2833 US Robert.D.Mesko@mvs02.usace.army.mil Monday through Friday 8:00 AM to 5:00 PM (Central Time) distributor dataset Horizontal Positional Accuracy Report The accuracy value was determined by measuring photo-identifiable control points collected with GPS survey methods in the orthophotos. Horizontal Positional Accuracy ASPRS Class I Standard for 200 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf meters 5.00 Horizontal Positional Accuracy ASPRS Class I Standard for 400 Scale Mapping for areas defined in the document PR_USVI_DEM_Footprint07_Rev.pdf meters 10.0 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. 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 banancing 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 pecified 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 Peter Briere 3001, Inc (770) 631-0903 (770) 631-0820 401 Dividend Drive, Suite K Peachtree City GA 30269 pbriere@3001inc.com 8:00 a.m. to 5:00 p.m. processor Source Contribution: Flight planning, image acquisition, image processing and image packaging. Source Type: disc 2400 Digital Aerial Imagery for 2006-2007 PRVI Orthophotography 2008-02-17 publication 3001, Inc. 401 Dividend Drive Suite K, Peachtree City, GA 30269 publisher 3001, Inc. originator Additional Information: (770) 631-0903 2007-10-22 Source Contribution: Horizontal and vertical control used to establish positions and elevations for reference and correlation purposes and as input to the aerotriangulation process. Source Type: disc 2400 Ground Control for 2006-2007 PRVI Orthophotography 2007-01-15 publication RLDA PO Box 41033 San Juan, Puerto Rico, 00940 publisher RLDA originator Additional Information: (787)268-6097 2006-11-01 Source Contribution: Ground elevations used for orthorectification process Source Type: disc 2400 DEM for Orthorectification of 2006-2007 PRVI Orthophotography 2005-02-01 publication 3001, Inc. 401 Dividend Drive Suite K, Peachtree City, GA 30269 publisher 3001, Inc originator mapDigital Additional Information: (770) 631-0903 2005-02-01 annually This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2016-01-11 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2025-03-24T17:16:45.568Z Last Metadata Review Date: 2010-02-26 U.S. Army Corps of Engineers 314-331-8385 314-331-8071 1222 Spruce Street St. Louis MO 63103-2833 US Robert.D.Mesko@mvs02.usace.army.mil Monday through Friday 8:00 AM to 5:00 PM (Central Time) pointOfContact