San Antonio-Espiritu Santo Bay, Texas Four band, 1meter resolution, UltraCam orthoimage

The NOAA Office for Coastal Management purchased digital Vexcel Ultracam imagery and digital elevation models of the Texas coastline at Espiritu-Santo Bay in 2007. The Coastal Texas project area is comprised of approximately 458 square miles. A total of 219 multispectral orthos were created to cover this area. Aerial imagery was collected in panchromatic, Red, Green, Blue and Near Infrared which yielded a natural color and false color infrared version of the completed digital orthophotography. Imagery was collected at an approximate altitude of 21000 feet above ground level.

Original contact information:

Contact Name: David Brostuen

Contact Org: Sanborn Map Company, Inc.

Title: Senior Program Manager

Phone: 719-593-0093

Email: dbrostuen@sanborn.com

These data have been created as a result of the need for having geospatial data immediately available and easily accessible in order to enhance the capability of the NOAA Office for Coastal Management (OCM) and the USGS.

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The bounding coordinates provided within the Spatial Domain section represent a rectangle covering the total area in which the project is located. The actual project boundary located within this area is comprised of areas delimited by areas along the coast of the state of Texas. The Coastal Texas project area is comprised of approximately 458 square miles. A total of 219 multispectral orthos were created to cover this area. Aerial imagery was collected in panchromatic, Red, Green, Blue and Near Infrared which yielded a natural color and false color infrared version of the completed digital orthophotography. Imagery was collected at an approximate altitude of 21000 feet above ground level. 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.

Vexcel Ultracam-D 1 Meter pixel resolution Color and color IR

Not Applicable

Users must assume responsibility to determine the usability of these data.

None

This 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.

No attributes present

Accuracy assessment determined by evaluating the horizontal accuracy of the ortho imagery as compared to photo-identifiable ground control points.; Quantitative Value: 0.94 meters, Test that produced the value: The horizontal accuracy was determined by calculating a Root Mean Squared Error (RMSE) for a number of surveyed checkpoint sites. The surveyed points were visually compared to the target site within the orthoimagery and horizontal offsets recorded. These recorded offsets were used to calculate an overall RMSE for the product. The formula used to calculate the RMSE values was: Accuracy(r) = 1.7308* RMSE(r). The resultant RMSE of the ortho was calculated to be 0.94 meters (NSSDA 95% CE). The orthoimagery exceeds the project specification of +/- 5 Meters CE95.

For the orthophoto product, there is no vertical accuracy.

Compliance with the accuracy standard was ensured by the placement of photo identifiable ground control points and the collection of airborne GPS data.

Compliance with the accuracy standard was ensured by the placement of photo identifiable ground control points and the collection of airborne GPS data. An RMS value was calculated based on the imagery utilized in the production of the tile by comparing the photoidentifiable points to the airborne GPS/IMU solution. This value represents an estimate of the accuracy of the horizontal coordinate measurements in the tile expressed in meters.