Digital Orthophoto Quadrangles (DOQ) have many positivesbut there are a few negatives in using them. They include:
a small area of coverage and a straight down perspective which shows no relief or the ability to perceive depth.
DOQ's generally are used as base maps and need other layers to get much usable data.
Also, DOQ's are current only when made and my guess is they would be outdated quickly unless a new aerial photo is scanned and processed.
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