Application of digital ground photogrammetry in engineering survey?

Digital ground photogrammetry is very important for engineering survey. This technology is widely used because of its advanced nature. It can solve difficult problems in the process of engineering survey, such as dangerous areas that are difficult to measure manually, and make engineering survey more convenient and digital. Digital ground photography has the advantages of short drawing time and low labor cost, and makes full use of modern digital equipment in the drawing process, which is difficult to achieve by manual surveying and mapping. Thus, the shortage of manual engineering survey is solved, the drawing efficiency is improved, and the input of various labor costs is reduced.

1 technical advantages of digital ground photogrammetry

With the continuous development and progress of modern digital surveying technology, at present, engineering surveying technology represented by brand-new digital ground photogrammetry technology has been paid more and more attention and become the best choice to replace manual photogrammetry. The advantage of this technology is that it can make large-scale maps and high-precision maps, and its role is becoming more and more obvious, which depends entirely on the use of modern digital processing technology for processing and storage. Therefore, it makes drawing more convenient and efficient while measuring.

Technical characteristics of 1. 1RTKGIS

Real-time dynamic measurement technology is abbreviated as RTK in English. This technology is mainly based on carrier phase measurement, and generally uses real-time differential method to measure the specified LAN. Geographic information system, abbreviated as GIS in English, plays an important role in geographical survey. With the support of this system, RTK can quickly measure the environment, and then store, centrally manage, analyze, display images and describe the measured data, so that digital ground photogrammetry can be measured and calculated in a digital way, and information collection can be presented in a digital and information-based way.

1.2 characteristics of total station

Total station is a high-speed, convenient digital information processing equipment and high-precision instrument system used in the field of measurement, which can measure different road conditions, mountains and harsh environments that are difficult to measure manually. Total station has the advantages of flexible operation, simplicity and portability, which can minimize the measurement accuracy error.

1.3 characteristics of tablet equipment

Tablet devices can take into account digital measurement devices, can describe and standardize information through tablets, and can directly generate digital information and images by connecting computers.

2 How to use digital ground photogrammetry technology in engineering survey

2. 1 engineering survey

Digital show-off photogrammetry technology can save a lot of economic costs for surveyors, with short cycle and fast drawing efficiency. Therefore, the measurement time will become shorter, and digital ground measurement technology can be used for acquisition.

Information is processed, analyzed, produced, stored and mapped. For example, when measuring equipment is used, as long as the original map is scanned on the equipment, the map can be displayed on the computer immediately. Therefore, it makes the mapping process more convenient.

2.2 Characteristics of digital mapping in engineering survey

The characteristics of digital mapping in engineering survey are convenient, efficient and fast, but the advantages and disadvantages of this digital technology are also obvious, that is, mapping can not accurately express the concrete and complex surface morphology of the surface, which makes the mapping accuracy not high and can not accurately express the mapping morphology. This is a disadvantage of this technology. However, if it is used with other great gods, the advantages of this device can still be reflected, which can improve the accuracy of map coordinates and reduce the error rate of the original map, thus making the drawing more credible.

2.3 the role of digital maps

The digital earth we are talking about is a technology that combines the actual situation and specific coordinates, uses computers and software to plan and manage it, thus forming high-precision map information and managing it according to the needs of cartography of the times. Whenever you use specific map information, you can use a computer to operate it, which is undoubtedly much simpler and more convenient. The advantages of digital earth are obvious. This software technology has two advantages: automation and systematization. At the same time, it can process complex information centrally, with strong running ability and strong automatic running ability.

2.4 Advantages of digital measurement technology

Digital measurement technology is the most mature and indispensable technology in contemporary engineering survey. Its advantages are: strong digital processing ability, centralized processing of information and data, measurement by using influence mode, improving measurement accuracy and reducing errors. This technology not only has high information processing ability, but also has the mapping function of three-dimensional model, which can make the image more stereoscopic, real and vivid, and is an indispensable mapping technology in contemporary measurement. For example, in the process of engineering survey, the information is highly processed and analyzed, the digital images are analyzed and matched, and a complete digital model is established, thus reducing the surveying cycle, improving the surveying quality and facilitating the surveyors to collect information.

3 abstract

To sum up, it is not difficult to find that modern digital camera geographic measurement technology has made engineering survey more convenient and more obvious due to the continuous development, progress and upgrading of science and technology, equipment and software, which has brought great help to modern engineering survey, map mapping and national surveying and mapping. Therefore, this digital camera geographic mapping method has been applied to mapping in various fields. It is convenient for people to meet the needs of surveying and mapping, and its role in surveying and mapping can not be ignored. Because of this, we will discuss and analyze the origin of this technology in this paper, so that everyone can know and understand this technology and apply it to actual surveying and mapping.

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