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Arkansas Digital Ortho Program (ADOP)

About the Program

doqAs each day passes, information grows out-of-date and becomes less accurate.  New subdivisions are built, cities annex new territory, and roadways are enhanced or changed all together. Aerial Digital Orthophotography is a special type of photography that is encoded with the correct latitude and longitude coordinates, enabling it to be used in several geospatial applications. This type of photography is acquired from a plane or satellite above a specified location enabling coverage of a large area at one time, which is ideally suited for mapping.

The image is then loaded onto a computer or server and incorporated into a base-map for analysis and processing of clear and precise images of the location. The maps that result from Aerial Digital Orthophotography are known as Digital Ortho Quads (DOQs). When the data becomes old, a new flight mission can be arranged to capture new photographs and data of the location.

Current, comprehensive, and precise map information is a crucial part of the decision-making process and analysis of land formations, geographic features, and locations.  Current orthophotography is a critical element in the public and private sectors for applications such as public safety/9-1-1, county tax assessment and reappraisal, economic development, and land use planning.

State Coordination

The images serve as the foundation for digital overlays of industrial parks, infrastructures such as water, power and gas lines, or administrative boundaries such as school districts or city boundaries. In fact, this data is among the most sought after data by GIS users and the public, and remains a priority layer of the State GIS Board. The Arkansas GIS Office provides leadership on and holds the procurement contract on statewide image database updates when funds are available. Upon request, the agency works with County and City government to define specifications, determine quality and seek out partnership opportunities to share in funding local projects. Following the acquisition of local level projects the GIS Office publishes local digital ortho image data on the state’s geospatial data platform,, thereby increasing the value and use of the data and reducing duplication.

Our long-range goal is to acquire one foot or better resolution orthophotography on a recurring three year cycle covering one-third of the state each year. The estimated investment is between $350,000 and $450,000 annually to achieve the ongoing cycle.