“Technology is moving so fast that it slowly replaces the surveyor.” These problems recur again and again as LiDAR scanning becomes more accessible. The most recent advancement in the field of scanning is LiDAR terrestrial mobile scanning (TMLS). This technology collects survey data at motorway speeds and traditional survey costs, and in the transport discipline it is a safer means of data collection, while reducing the risk for the entire project. But he has surveyors who question the longevity of his profession. What is considered a threat because of its effectiveness must be embroidered so that the shooting can survive. Land surveyors significantly reduce the cost of geodetic work, since they do not advance in modern measurement technologies. Understanding and accepting responsiveness to unconventional ways greatly contributes to the success of the research profession and the clients you serve.
Mindset change
Historically, improving the profession of surveyors includes the use of real-time field crew members (RTK) and global positioning systems (GPS). The robotic total station was another scientific invention helping survey specialists who rejected landing crews. There is also a calculator for field trigger values and computers for CAD drawings, but historically they have been too widely accepted and widely used today. Occupation adjusted.
Now mobile 3D laser scanning creates a new understanding because of a limited view of the profession, although TMLS should not be considered as another replacement. The future profession of surveyors is still viable if the technology is used as “another toolbar tool”. Hans Hess, former CEO of Leica Geosystems, one of the largest manufacturers and suppliers of both field research equipment and static laser scanners, says he is faced with this. “Sometimes I hear our customers say,“ Well, the surveyor’s profession dies and we have no future. ” The need for geo-information is huge and growing, geo-information should be more modern, more 3D, more accessible via the Internet, etc.
Understanding of technology
Technology is constantly changing, so surveyor tools. The final product is as good as the raw field data. TMLS systems measure hundreds of thousands of points per second when driving at speeds. The collected data are full three-dimensional images of the measured space. What used to take months, takes only a few hours in the field. A survey engineer or CAD engineer can extract the necessary functions of this data to an office on the desktop. As the surveyor learns spatial recognition, virtual walking of the site becomes an advantage to the data extraction process. This method allows the surveyor to extract data in more areas than he would take traditional imagery every 25 feet.
Accompanying video documentation and digital images can improve the quality of QA / QC through a recorded visual link. This allows the surveyor to return to the site on the desktop instead of re-viewing the field to make additional observations. In combination, this creates a collection of the best survey data for surveyors with additional benefits.
The benefits of TMLS Surveyors are to approach this proven technology as a way to solve problems in this area. Many organizations have developed key standards for safety, efficiency and accuracy, and mobile 3D laser scanning is directed to these standards in the following ways.
Safety: pavement documentation at road speeds improves safety and efficiency for both traveling people and land surveyors in the following ways. It:
• eliminates short circuits on roads / roads
• reduces traffic disruption,
• completes the project faster than traditional methods
• is a safer data collection method and
• keeps the surveyor from the red zone.
Efficiency: Since internal inspectors provide personnel control and verification using traditional methods, efficiency is enhanced, and these benefits can be transferred to the client by:
• accelerating the schedule of project projects due to faster data collection in the field,
• results created through our own technical specialists,
• data available for retrieval, when necessary, as needed, where necessary, and
• control over data remaining in-house.
Accuracy: TMLS is a proven technology. Evaluations performed in the Caltrans test zone, specifically designed to evaluate mobile laser scanning systems that are allowed with an RMS error of 0.022. The route chosen was to allow companies advanced in mobile laser scanning technology to conduct an independent assessment with the accumulated CalTrans data collection points.
TMLS implementation
Many surveyors have mastered only one way to conduct geodetic work, and they need to expand their horizons by studying several software packages for field and office calculations. There are many new services that a traditional surveyor can add to the profession for expanding business through TMLS. Surveyors, who originally acquired scanners to complete traditional surveys and inspections, decide their own niche in the industry through crash recovery surveys. Companies that have been involved in forensics for many years have found that laser scanning allows them to conduct research faster and more thoroughly, and my access to scanner data keeps them ahead of competitors when bidding in new jobs.
In the past, the airborne industry has documented most overhead line surveys. Thanks to mobile 3D laser scanning, you can accurately determine wires with a diameter of up to 3 mm and measure their heights. The data allows to calculate fluctuations and sagging of overhead power lines. The cost to the client between onboard and mobile surveys is a drastic reduction. The fact that the "fly-by" was replaced by the speed of the traditional methods, "drive" added the cost advantages. TMLS, for example, the UK StreetMapper, can easily be adapted in less than an hour to ships providing high-resolution coastal ground observations, including dunes, coastal mounds, benches and vegetation. The resolution of a 3D laser scan far exceeds the resolution that can be obtained using traditional imaging techniques. This allows for reviews of unreleased details.
Fast data retrieval through TMLS allows you to generate 3D models of cities for use in matters of internal security and evacuation planning. Coloring the models adds benefits to the city's planning boards and marketing points of interest and expansion. Urban modeling is rapidly becoming an important catalyst for data collection with technologies such as Google Earth and MapQuest.
Railway tasks require reliable survey data. Due to the high load on transport, in combination with the age structure of the railway network, the responsible administrations have to focus on maintenance activities in projects to ensure quality, safety and sufficient throughput. The negative impact of maintenance tasks should be as small as possible. This is even more important for the necessary basic engineering and survey work that is needed in advance to collect basic data for planning and construction preparation. The hybrid-mounted TMLS minimizes survey efforts to collect the required data along existing railways.
Only relatively short driving time is required for data collection, while the traffic flow does not significantly affect. This approach reduces both costs and security risks. TMLS 3D airport surveys allow engineers and land surveyors to perform runway scan data, build tracks, measure distance, sign and location identification, and survey taxiways and aprons, all without disturbing air traffic.
Automatic routing permits for truck-to-height and bridge gaps using traditional survey methods are expensive, time-consuming, and difficult to manage changing data due to the continuation of new road reconstruction projects. Obtaining accurate estimates for bridge heights and permits at speeds is the most effective way to measure various structures and characteristics of the road surface. For vertical sections of road structures, errors of more than 1/2 inch were obtained, which is crucial in planning a large-size route. Horizontal demining measures should also be supported. Working crews are at serious risk for traffic. Work must be carried out during the existing movement, which can lead to errors. In a system-wide perspective, clearance information is in many cases incomplete, inaccurate and difficult to maintain and accessible.
Road surveys using mobile 3D laser scanning are used to maintain and manage assets of road surfaces and street configurations by identifying concreting and pitting. Construction monitoring can also be obtained for the judicial identification of the placement of reinforcement in front of the shower. This data allows you to fully use the contour of the surface for the conduct of road crowns and ruts.
Mark Kuhn, BOS, geospatial research manager at Erdman Anthony, says: “We are currently using ground-based LiDAR for highway and bridge research for NYSEDOT, and it is obvious that the mobile lidar will be the technology of choice sooner or later.”
These are just some of the ways that a surveyor can improve their services using TMLS as another tool in their toolbar. Researchers who understand and accurately position themselves to respond to these technological advances will be ahead of the problems of a clumsy, seemingly dying breed.
