Through partnerships with the USGS, State, and local government, AGRC is pleased to announce the new acquisition and availability of 2,110 square miles of 12.5cm (~5 inch) resolution 4-band aerial photography imagery.
This public domain imagery is the latest addition to the State Geographic Information Database’s (SGID) High Resolution Orthophotography (HRO) collection. The imagery was collected between March 28 and June 1 of 2012.
The HRO 2012 imagery can be viewed and downloaded from AGRC’s interactive map, downloaded from the AGRC FTP site or viewed through our Image Server. Image Server users should be aware of upcoming changes to image services in the ArcMap 10.1 server environment.
Large area requests can be filled by contacting Rick Kelson to schedule a time to bringing in an external hard drive to AGRC. Contact Rick Kelson with any other questions or concerns regarding this product.
The imagery was collected by Aero-Graphics based in Salt Lake City. Here is an overview of the data collection effort:
- 12,904 exposures acquired at a 12.5 cm ground sample distance (GSD).
- 247 flight lines flown with a Vexcel UltraCamX digital camera system.
- 60% side and 80% forward overlap over downtown SLC and the U of U (to minimize building lean).
- 4-band GeoTIFF delivery of 1,436 tiles in 2000m x 2000m tiles (roughly 1GB each).
- AGRC supplied local ground control which was used with supplemental aero-graphics control from other projects.
- Covers entire Wasatch Front from North Ogden to Santaquin, including Wasatch Mountains.
- Horizontal accuracy standard was +/- 37.5cm at or above a 95% confidence level.
We’d like to thank our partners for helping to make this acquisition happen with funding and/or quality control assistance: USGS, Salt Lake County (and their city partners), Weber County, and UDOT.
Sample imagery near Utah Valley University in Orem (click to view sample images at true scales of 1 : 200 – 1 : 4,000):