1. A photogrammetric analytical measurement system for producing a survey map on the basis of respective first and second photographed pictures obtained at two different photographing positions, each of said first and second pictures including an object image to be recorded on said survey map and a standard measurement scale image for producing a proper relative size of said object image, said system comprising: a monitor that displays said first and second pictures; a designator that receives manual designations from an operator of a two-dimensional position on said first and second pictures displayed on said monitor; a retriever that retrieves, as a set of two-dimensional position data, a first two-dimensional position received as a manual designation on said first picture by said designator, and a second two-dimensional position received as a manual designation on said second picture by said designator; a first calculator that approximately calculates three-dimensional position data of said standard measurement scale image and said object image on the basis of plural sets of two-dimensional position data, retrieved by said retriever, corresponding to said standard measurement scale image and said object image, and received as manual designations by said designator; a second calculator that calculates a dimensional parameter of said standard measurement scale image on the basis of the three-dimensional coordinate position data of said standard measurement scale image; a converter that converts the dimensional parameter of said standard measurement scale image into an estimated actual dimensional parameter on the basis of a known actual dimensional parameter of said standard measurement scale image; and a determiner that determines whether or not a difference between said estimated actual dimensional parameter and said known actual dimensional parameter falls in a predetermined permissible range, whereby it is confirmed whether the manual designations of the two-dimensional positions received by said designator are not in error.