Abstract. Terrestrial laser scanning (TLS) is a modern method of spatial data acquisition. The most common application of this method is large scale topographic mapping. Point clouds obtained with laser scanning contain all necessary data for producing topographic maps and plans. One of the territories, where TLS is particularly important, is oil and gas deposits. Built-up areas of oil and gas deposits are represented with complicated industrial objects. On the one hand, introduction of TLS method for surveying of these areas significantly speeds up field surveying works. On the other hand, dense point clouds of built-up areas slow down the process of mapping due to the necessity to filter extra data. To hasten the process of mapping special algorithms of feature extraction from point cloud and techniques of compiling plan and maps are being developed. Nonetheless, majority of developed algorithms can work fine for point clouds of high uniform density where the number of objects is not large. For built-up areas developed algorithms can be not applicable. The basic steps of compiling a topographic plan are described. It is discussed which object types can be automatically extracted and vectorized in built-up areas of oil and gas deposits. The examples of manual point cloud vectorization are given.

A scale plan is one of the main products in the railway industry. For creating electronic versions of such plans, GIS allowing to combine heterogeneous data obtained by surveying instruments and survey complexes is increasingly being used. GIS has a wide functionality and allows its expanding due to the possibility of developing user software modules, thanks to which it is possible to significantly speed up the process of surveying data processing in order to create scale plans. The results of generating the scale plan according to the survey data obtained with a hardware-software system "Profile-M" and UAV are described. It is discussed that UAV data can reduce the amount of field measurements performed by the hardware-software system, as well as become sources of control measurements for terrestrial surveying.

The territories of oil and gas deposits are represented with complicated and diverse industrial objects. During their operation and building of new constructions it is necessary to conduct topographic survey. Various methods are used for this purpose. The selection of these methods is determined by the degree of area build-up, its size and scale of the topographic plan being created. Aerial methods of topographic surveys are relevant when mapping large territories. Terrestrial methods are used more often when surveying oil and gas objects. Among terrestrial methods classically are accepted tacheometrical survey and GNNS measurements. Terrestrial and mobile laser scanning currently gained great popularity. Introduction of laser scanning methods allowed users to significantly speed up field works keeping high accuracy of obtained data. The advantages of laser scanning application comparing to classical methods when surveying oil and gas deposits are described. It is discussed what cases of classical method application can be more preferable. To cover all the bases the description is provided on the basis of 3 deposit parts, which are different in the degree of area build-up and have different requirements for topographic plan creation as follows: scale, need to input semantic information, a format of representing the result. Introduction of new survey methods requires developing appropriate data processing techniques. As a rule, each new survey territory has its own features which should be taken into account when developing new techniques. The techniques for creating topographic plans using terrestrial laser scanning, mobile one and GNNS measurements are described.

Various technical equipment are used for surveying the condition of the road surface. One of the most modern methods for assessing the state of roads is mobile laser scanning (MLS), which allows obtaining a point model of road surface with high density accuracy and in a short period of time. After generating a digital surface model (DSM) from an array of laser points, we can identify various defects of the roadway and evaluate its flatness. A prerequisite for obtaining reliable survey results is increased accuracy of the pre-processed point cloud. During pre-processing 2D scanners and digital cameras are calibrated, point clouds are adjusted and filtered. The necessity for increased accuracy of pre-processing results for the purpose of generating the DSM imposes certain requirements on data processing techniques. For this purpose, additional study of the MLS data accuracy should often be carried out. The results of preliminary processed MLS data in order to generate high-accuracy DSM of road pavement are discussed.

Laser scanning technology is actively used in various industries. Laser scanning has provenbe a highly precision method of collecting spatial data to solve various tasks. In the oil and gas industry, these are the tasks associated with the study of pipelines for degradation in order to prevent fuel leakage, study of tank state and assessment of their deformations due to various adverse factors, including soil subsidence, timely detection of mechanical damage to oil and gas infrastructure, assessment of the protective structure health, allowing to identify the degree of their reliability in case of emergencies. In order to use the laser scanning technology to identify most of the issues in a timely manner, as well as to assess their possible consequences, various studies are being carried out to develop data collection techniques, to increase the automation degree of the processing the surveying results and their accuracy, to develop methods of creating the final product, demonstrating the result of the processing in the desired form. These modern research trends in the laser scanning technology in order to control the state of protective constructions when transferring oil products are considered. Depending on a laser scanner position when surveying, 3 its types are distinguished: terrestrial, airborne and mobile. Recommendations of applying laser scanning types are discussed. The advantages of applying each type of laser scanning when monitoring various types of protective constructions are indicated. As an example, terrestrial and mobile laser scanning data are given for one site—the oil and gas condensate deposit area. Accuracy of laser scanning data and the reasons for possible errors in their pre-processing are analyzed. It is shown that additional surveying allows detecting changes in the state of various territory objects.