ABSTRACT 
This paper describes experiences at ACIC obtained with the AP-2 
Plotter. It discusses the basic concepts upon which the AP-2 Plotter 
operates, some key tests performed, problems associated with its 
introduction into a mapping organization and evaluates the plotter 
in respect to contemporary instrumentation. Emphasis in technical 
discussion is placed upon the capability of the plotter to remove 
systematic distortions arising from random and non-random sources. 
This instrument represents a great advancement in photogrammetric 
instrumentation, but in its present form should not be expected to 
reduce operational time significantly in bridging and compilation 
operations. The AP-2 allows more complete exploitation of photo 
grammetric materials but because of its complexity and increased 
requirements for advanced' personnel training, it will not be easy 
for most organizations to incorporate it in their line operations. 
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