USGS High Resolution Orthoimagery Collection - Historical - National Geospatial Data Asset (NGDA) High Resolution Orthoimagery

Metadata Updated: December 8, 2017

USGS high resolution orthorectified images from The National Map combine the image characteristics of an aerial photograph with the geometric qualities of a map. An orthoimage is a uniform-scale image where corrections have been made for feature displacement such as building tilt and for scale variations caused by terrain relief, sensor geometry, and camera tilt. A mathematical equation based on ground control points, sensor calibration information, and a digital elevation model is applied to each pixel to rectify the image to obtain the geometric qualities of a map. A digital orthoimage may be created from several photographs mosaicked to form the final image. The source imagery may be black-and-white, natural color, color infrared, or color near infrared (4-band) with a pixel resolution of 1-meter or finer. With orthoimagery, the resolution refers to the distance on the ground represented by each pixel.

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Metadata Date December 17, 2014
Metadata Created Date April 10, 2014
Metadata Updated Date December 8, 2017
Reference Date(s) January 1, 2009 (publication)
Frequency Of Update irregular

Metadata Source

Harvested from USGS High Resolution Orthoimagery Collection - Historical

Additional Metadata

Resource Type Dataset
Metadata Date December 17, 2014
Metadata Created Date April 10, 2014
Metadata Updated Date December 8, 2017
Reference Date(s) January 1, 2009 (publication)
Responsible Party U.S. Geological Survey Earth Resources Observation and Science (EROS) Center (Point of Contact)
Contact Email
Access Constraints Use Constraints: There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to for the USGS disclaimer., Access Constraints: Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.
Bbox East Long -56.0
Bbox North Lat 72.0
Bbox South Lat -17.0
Bbox West Long -180.0
Collection Metadata true
Coupled Resource
Frequency Of Update irregular
Harvest Object Id b94b652d-f142-4b9d-91b1-1cad65ec0a86
Harvest Source Id dcb88e74-67bb-4129-b675-00cbdecc9ac2
Harvest Source Title USGS High Resolution Orthoimagery Collection - Historical
Licence Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2001-01-01

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