Method of determining the regulatory requirements for the technological stages` accuracy in topographic aerial photography

Introduction of BIM-modeling methodology and geoinformation technologies in the construction industry causes the need of taking into account the specific customer requirements for the accuracy of building 3D-models in engineering-geodetic surveys. The author analyzes the requirements to the exactness of the technological stages of the current regulatory document on aerial photographic survey. The represented concept of approaches to precision standards corresponds to the outdated analogue model. The need for a different method of determining normative tolerances in obtaining modern types of products is noted. The relevance of requirements to the accuracy of building 3D-models without reference to the scale of the topoplan and the height of the relief section is shown. The method of designing the regulatory admissions for the accuracy of technological stages is proposed. They are designed for a particular object before the beginning of fieldwork with controlled variations of error accumulation coefficients and expressed as average errors in centimeters and fractions of a pixel on the ground. The obtained allowances are the substantiating requirements for the chosen technology and accuracy control of the work results in the technical design of aerial photographic survey. Practical calculation of tolerances for constructing a 3D model of the urban development object to meet the customers’ requirements was carried out. Conclusions are given on the prospects of the method in areas that use remote sensing materials with any technology of their processing and a variety of user’s needs.