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High Resolution Orthoimagery

High resolution orthorectified images 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, or color infrared with a pixel resolution ranging from 6" to 1-meter. With orthoimagery, the resolution refers to the distance on the ground represented by each pixel.

Georeferenced orthoimages support a variety of geographic information analysis and mapping applications, and provide the foundation for most public and private Geographic Information Systems (GIS).

Orthoimagery is available for download in a Mr.Sid File Format (SID).

Florida Statewide Base Digital Orthophoto Program

The High Resolution Orthoimagery collection has been acquired in partnerships with other state, or regional agencies. Since data comes from a variety of sources, the resolution, area of coverage, file size, and projection will vary by dataset. Image Services maintains and distributes this orthoimagery, which can include black-and-white, natural color, and color infrared.