The social and technical situation for surveying is greatly changing in recent years. In a similar way, as administrative reform and deregulation are needed in the area of the public survey, active introduction of the new survey technique which would not harm the product quality is expected. However, it is seldom known about a required procedure for introducing new methods under the survey low. This paper explains the general view of using survey new technology in public survey.
Basic measurement principle and characteristics of the terrestrial laser scanner, And the summary of some steps taken in service or in manufacturing in order to ensure accuracy specifications and performance are met.
Laboratory of Dr. Shikada, Dr. Tokunaga and Dr. Shimokawa established a research group for students to learn geo-informatics at 2005. Each laboratory's major researches are GNSS, GIS, Remote Sensing and BIM respectively. A few years later K.I.T. Office of Collaboration & Innovation of Division of Industry-University Collaboration assisted our group and members expanded to private company in Hokuriku area. At that time, our group name was changed to K.I.T. Geospatial Information Project. After that, a number of company proposed to discuss about Terrestrial Laser Scanner because of that official manual dose not existed. In this paper, we introduce our project and relationship between JSPRS and K.I.T. Geospatial Information Project.
Purpose of the paper is to spread the practical use of Terrestrial Laser Scanner for surveyors. Ten survey consulting company of Hokuriku district participated to demonstrated experiments from four years before and did five experiments. Almost all kind of the machine of Terrestrial Laser Scanner in the Japan was able to collect to do experiments in the same place, same day and same time. Our working group's trial will be able to contribute to the standardization of public survey.
3D cloud point data using Terrestrial Laser Scanner has been spreading to survey for a decade. The Geospatial Information Authority of Japan (GSI), however, does not establish yet the official specifications in the Operation Specifications for Public Surveys. The object of the manual working group of K.I.T. Geospatial Information Project is to make specifications for Terrestrial Laser Scanner. This paper introduces the activity to make manual of Terrestrial Laser Scanner for public survey by KIT manual working group.
We developed the topographic survey technique using terrestrial laser scanner, and compiled “Terrestrial laser scanning survey manual”. In this paper, accuracy verification is reported, which was approved by President of Geographical Survey Institute as a public survey in accordance with the 2nd term of article 17 in Public Survey Work Regulation (The exception about equipment and technique).
At present, technology has advanced rapidly, and new methods of survey have produced one after another. These required certification for the products. We have developed a certification manual of Terrestrial Lase mapping products. In this paper, the manual is introduced.
We demonstrate development of a forest biomass map by an efficient methodology using airborne LiDAR data, and validate its accuracy. The study area is Yokohama City, Japan, an area of 437.4 km2. An allometric equation was developed from field measurement data to convert canopy height measured by airborne LiDAR to biomass, and then a map of aboveground biomass (AGB) at 5 m resolution was produced. After validation, the estimation of AGB had a root mean square error of 60.6 Mg ha-1 and an average relative error of 38.7%. The total forest AGB in Yokohama was estimated as 913,450 Mg. The results suggest that airborne LiDAR is suitable for developing a reliable forest biomass map, even for scattered forests in urban area.
We analyze and evaluate a correlation of total coliform and entropy of laser profiler data on a monthly basis in the downstream of Oita, Ono and Ototsu River. In addition, we analyze and evaluate the optimal range to use laser profiler data from the total coliform's observation points. As a result of the analysis, we found that the correlation of total coliform of May and entropy of laser profiler data is high, and the correlation is high in the case of using laser profiler data of about 300m radius.
Recently, monitoring dynamic changes in people flow has become necessary, in order to mitigate secondary disasters following earthquakes, fires or other major events such as the East Great Japan Earthquake. In technical terms, tracking mobile objects by GPS, PHS, CCTV camera, IC (integrated circuit) tickets or mobile phone base station enables us to measure people flow according to various dimensions. This article describes type of spatio-temporal data about people flow and its basic process and analysis for secure and effective use.
Emergence of large-scale data such as GPS logs and mobile phone Call Detail Records (CDR) has significantly advanced understanding on mass population movement. Besides studies on human mobility patterns and data mining techniques, applications of such data to address issues in society are being developed rapidly. This article introduces challenges in the application through cases from data challenge contests and efforts in improving public services such as transportation, public health, and disaster management.
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