Study on Key Technology in the Control Surveying of Jinan-Qingdao Highway’s South Line

2011 ◽  
Vol 90-93 ◽  
pp. 2853-2857
Author(s):  
De Bao Wang ◽  
Xue Ling Fang
Keyword(s):  
Coordinate System ◽  
High Precision ◽  
Survey Design ◽  
Control Network ◽  
Central Meridian ◽  
Key Technology ◽  
Primary Survey ◽  
Vertical Control ◽  
Vertical Datum ◽  
Selection Of

The south line of Jinan Qingdao highway (which is short of Ji-Qing south line) spans 281km, whose geomorphy is mainly composed by mountain lands and hills. Approximately, it runs from east to west and straddles several projection zones. Systemic conformance of its layout and measurement, high precision in company with multifunctional planes and vertical control nets make up this project’s key technological problems. The report tells of the selection of central meridian in different areas of Ji-Qing south line and the layout, observation, adjustment, height fitting and precision statistics of GPS control network; the layout, observation, adjustment and precision counting of vertical control nets; Meanwhile, it analyses and discusses that how to guarantee the systemic conformance of coordinate system and vertical datum, together with eliminating the division of points’ coordinates and elevation values’ steps when primary survey design are being made synchronously in two super highways or in different areas of the same expressway.

Key Technological Research on the Control Survey of Qingzhou-Linshu Super Highway and the Aerial Photogrammetry of Topographic Map

2012 ◽  
Vol 170-173 ◽  
pp. 2870-2875
Author(s):  
De Bao Wang ◽  
Xue Ling Fang ◽  
Jun Huang ◽  
Zhao Bo Xing
Keyword(s):  
Coordinate System ◽  
Survey Design ◽  
Control Point ◽  
Observation Data ◽  
Topographic Map ◽  
Aerial Photogrammetry ◽  
Reconnaissance Survey ◽  
Vertical Datum ◽  
Highway Network ◽  
Leveling Control

Qingzhou-Linshu super highway, spanning 228.333km, is located in the center of Shandong province, which forms a south-to-north expressway channel. Undoubtedly, it’s an important part of Shandong highway network. Approximately, it runs from south to north and one projection zone is enough to satisfy relevant requests of horizontal coordinate system; From Qingzhou to Mazhan Town, Yishui County, most are hilly and mountainous terrain while from Mazhan Town, Yishui County to Linshu County, most are plain terrain, except for a few rolling terrain. As a result, fourth-order leveling control network is enough to meet the requirements of reconnaissance survey, design and constructive lofting. As the expressway and Ji-Qing south line carry out reconnaissance and design simultaneously and form an interchange at Mazhan Town, Yishui County, plus tight time and intense work, the systemic conformance of horizontal coordinate system and vertical datum are in high demand. The report analyses and discusses the adoption of horizontal and vertical network’s starting points, layout, observation, data processing and adjustment, together with eliminating the coordinate division and elevation value’s step of the same control point. In the meantime, it analyses how to make rapid aerial photogrammetry for the whole line with the scale of 1/2000, so as to improve the precision and reliability of horizontal and vertical datum as well as speed up the process of charting and utmostly satisfy the demand of highway reconnaissance and design.

scholarly journals Estimating Canadian vertical datum offsets using GNSS/levelling benchmark information and GOCE global geopotential models

2012 ◽  
Vol 2 (4) ◽  
pp. 257-269 ◽  
Author(s):  
T. Hayden ◽  
B. Amjadiparvar ◽  
E. Rangelova ◽  
M.G. Sideris
Keyword(s):  
High Resolution ◽  
Geoid Height ◽  
Omission Error ◽  
Control Network ◽  
Commission Error ◽  
Vertical Control ◽  
Geopotential Models ◽  
Vertical Datum ◽  
Local Vertical Datum ◽  
Omission Errors

AbstractThe performance of GOCE-based geopotential models is assessed for the estimation of offsets for three regional vertical datums in Canada with respect to a global equipotential surface using the GNSS benchmarks from the first-order vertical control network. Factors that affect the computed value of the local vertical datum offset include the GOCE commission and omission errors, measurement errors, the configuration of the network of GNSS/levelling benchmarks, and systematic levelling errors and distortions propagated through the vertical control network. Among these various factors, the effect of the GOCE omission error on the datum offsets is investigated by extending the models with the high resolution gravity field model EGM2008 and by means of Canada’s official high resolution geoid model CGG2010. The effect of the GOCE commission error in combination with errors from the GNSS/levelling data is also examined, in addition to the effect of systematic levelling errors. In Canada, the effect of the GOCE omission error is at the dm-level when computing local vertical datum offsets. The effect of including accuracy information for the GNSS/levelling data and the GOCE geoid heights can be up to 4 cm over the Canadian mainland and at the dm-level for island regions. Lastly, the spatial tilts found in the levelling network can be modelled with a 2-parameter bias corrector model, which reduces the RMS of the adjusted geoid height differences by 4 cm when compared to the RMS of adjusted geoid height differences computed without the use of a bias corrector model. Thus, when computing local vertical datum offsets in Canada, it is imperative to account for GOCE commission and omission errors, ellipsoidal and levelling height errors, as well as the systematic levelling errors of the vertical control network.

Establishment of local coordinate systems in the transition to the geodetic system of coordinates of GSK-2011

2017 ◽  
Vol 929 (11) ◽  
pp. 2-10
Author(s):  
A.V. Vinogradov
Keyword(s):  
Coordinate System ◽  
Small Businesses ◽  
Transition Period ◽  
Local Coordinate System ◽  
Initial Point ◽  
Central Meridian ◽  
Administrative District ◽  
Local Networks ◽  
Small Areas ◽  
Geodetic System

Pretty before long there will be transition to the geodetic system of coordinates of GSK-2011. For the transition period it is necessary to develop a method of recalculating coordinates from one system to another. The existing methods of recalculating coordinates are designed for recalculating coordinate points of state geodetic networks (GGS) and geodetic local networks (GSS). For small areas (administrative districts, populated areas) simplified methods are more acceptable. You need to choose the resampling methods that can be applied in small businesses, performing surveying works. The article presents the the results of calculations of changes of coordinates of the same point in GSK-2011 and SC-95 in six-degree zones of Gauss projection. It was found that in each region values of the shifts changed to small ones. Therefore, it is possible to convert the coordinates of the points by the simplified formulae. For recalculation from the coordinates of GSK-2011 in SK-95 or local coordinate system (WCS) of the administrative district it is necessary to find the origin of coordinates, scale value and rotation of the coordinate axes. The error of the conversion shall not exceed 0,001 m. The coordinates of the initial point of the local coordinate system relative to the central meridian of the local coordinate system shall be added in the list of parameters of the transition from local coordinate system to the state one.

scholarly journals Visual-Inertial Odometer-Based Global High Precision Indoor Human Navigation in a University Library

2019 ◽  
Vol 1 ◽  
pp. 1-2
Author(s):  
Shinpei Ito ◽  
Akinori Takahashi ◽  
Ruochen Si ◽  
Masatoshi Arikawa
Keyword(s):  
Coordinate System ◽  
High Precision ◽  
Real World ◽  
Indoor Navigation ◽  
Experimental Result ◽  
Coordinate Space ◽  
Central Position ◽  
Global Coordinate System ◽  
Prototype System ◽  
3D Environments

<p><strong>Abstract.</strong> AR (Augmented Reality) could be realized as a basic and high-level function on latest smartphones with a reasonable price. AR enables users to experience consistent three-dimensional (3D) spaces co-existing with 3D real and virtual objects with sensing real 3D environments and reconstructing them in the virtual world through a camera. The accuracy of sensing real 3D environments using an AR function, that is, visual-inertial odometer, of a smartphone is extremely higher than one of a GPS receiver on it, and can be less than one centimeter. However, current common AR applications generally focus on “small” real 3D spaces, not large real 3D spaces. In other words, most of the current AR applications are not designed for uses based on a geographic coordinate system.</p><p>We proposed a global extension of the visual-inertial odometer with an image recognition function of geo-referenced image markers installed in real 3D spaces. Examples of geo-referenced image markers can be generated from analog guide boards existing in the real world. We tested this framework of a global extension of the visual-inertial odometer embedded in a smartphone on the first floor in the central library of Akita University. The geo-referenced image markers such as floor map boards and book categories sign boards were registered in a database of 3D geo-referenced real-world scene images. Our prototype system developed on a smartphone, that is, iPhone XS, Apple Inc., could first recognized a floor map board (Fig. 1), and could determine the 3D precise distance and direction of the smartphone from the central position of the floor map board in a local 3D coordinate space with the origin point as the central positon of the board. Then, the system could convert the relative precise position and the relative direction of the smartphone’s camera in a local coordinate space into a global precise location and orientation of it. A subject was walking the first floor in the building of the library with a world tracking function of the smartphone. The experimental result shows that the error of tracking a real 3D space of a global coordinate system was accumulated, but not bad. The accumulated error was only about 30 centimeters after the subject’s walking about 30 meters (Fig. 2). We are now planning to improve our prototype system in the accuracy of indoor navigation with calibrating the location and orientation of a smartphone based sequential recognitions of multiple referenced scene image markers which have already existed for a general user services of the library before developing this proposed new services. As the conclusion, the experiment’s result of testing our prototype system was impressive, we are now preparing a more practical high-precision LBS which enables a user to be navigated to the exact location of a book of a user’s interest in a bookshelf on a floor with AR and floor map interfaces.</p>

scholarly journals Re-Transmission Assessment Survey Filariasis Pasca Pengobatan Massal di Kabupaten Agam, Provinsi Sumatera Barat Tahun 2016

2018 ◽  
pp. 143-152
Author(s):  
Santoso Santoso ◽  
Sri Cahyaningrum
Keyword(s):  
Elementary School ◽  
Elementary School Students ◽  
Survey Design ◽  
Rapid Test ◽  
Brugia Malayi ◽  
Sample Survey ◽  
School Students ◽  
Specific Antibodies ◽  
Assessment Survey ◽  
Selection Of

Agam District finished the repetition of Filariasis treatment for 2 years, so Agam must be conducting the Re-TAS. Re-TAS was conducted on elementary school students grade 1 and 2 in the district of Agam. Survey design using the school cluster. The number of schools selected were 40 schools. Selection of the sample schools were calculated using sample survey builder (SSB). All students grades 1 and 2 in selected schools were examined using Brugia Rapid test to assess the presence of specific antibodies against Brugia malayi and B. timori worms. The  number of students who registered as many as 1,999 children, while being examined by RDT as many as 1,717. A total of 282 students were absent during the examination or refused to be examined.Test results showed that 3 positive, 1694 negative, 20 invalid and 3 samples were excluded. The number of samples taken into account to assess the transmission of filariasis as many as 1,697, which is only positive and negative samples. The survey found that the minimum sample was adequate and the number of positive children under the cut off point, so Agam passed TAS 1.

scholarly journals Key technology of high-precision time frequency transfer via 200 km desert urban fiber link

2019 ◽  
Vol 68 (6) ◽  
pp. 060602
Author(s):  
Kang Ying ◽  
You-Zhen Gui ◽  
Yan-Guang Sun ◽  
Nan Cheng ◽  
Xiao-Feng Xiong ◽  
...  
Keyword(s):  
High Precision ◽  
Key Technology ◽  
Time Frequency ◽  
Precision Time ◽  
Fiber Link ◽  
Frequency Transfer

scholarly journals Dryland Farmers on Climate Resilient Practices – An Adoption Study at an Industrialized Taluk of Tamil Nadu

2020 ◽  
pp. 169-177
Author(s):  
D. Alagu Niranjan ◽  
Dipak Kumar Bose
Keyword(s):  
Correlation Analysis ◽  
Tamil Nadu ◽  
Survey Design ◽  
Conservation Tillage ◽  
Primary Data ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Adoption Study ◽  
Planting Materials ◽  
Selection Of

Aims: To study the adoption of climate resilient practices by the farmers in the dryland region. Study Design: Cross-sectional survey design was used for the present descriptive study. Place and Duration of Study: The study was conducted in Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad (Prayagraj) during the year of 2018 and for the period of 6 months. Methodology: The study used direct interview method with the subjects using a structured and pre-tested interview schedule for primary data collection in the sampled area which is an industrialized taluk of Tamil Nadu. The selection of area was purposeful, whereas, selection of villages was random and 15 respondents form each village was convenient. The collected data was tabulated and interpreted using descriptive statistics and correlation analysis. Results: The results of the study suggest that there is a poor adoption level of climate resilient practices existing among the dryland farmers. While, some of the practices like incorporation of residues in to soil instead of burning, brown and green manuring, conservation tillage, temperature tolerant varieties, farm machinery custom hiring centre, location specific intercropping systems, crop rotation, usage of better planting materials, prophylaxis, custom hiring centre and weather based insurance were adopted to some extent. Though there was no specific intervention to sensitize on these practices, adoption of above mentioned practices were found which could be due to the passive adaptation by the farmers of the locality over years. And the results of correlation analysis revealed that there is a significant relationship between adoption of climate resilient practices and variables like the respondents’ education, exposure to mass media exposure, contacts with extension agents, innovativeness level, risk orientation and scientific orientation at 0.01% level of significance. Conclusion: The results of the study will definitely help in evaluating government projects (as baseline) like National Initiative on Climate Resilient Agriculture, and strengthening programme planning and implementation in climate change.

scholarly journals Study on selecting of prefabricated plant site basing on BP neural network

2018 ◽  
Vol 53 ◽  
pp. 03073
Author(s):  
Yao Gang ◽  
Yang Yang ◽  
Shen Xin ◽  
Li Jun
Keyword(s):  
Neural Network ◽  
Prediction Model ◽  
High Precision ◽  
Bp Neural Network ◽  
Raw Materials ◽  
Output Factor ◽  
Plant Site ◽  
Selection Of ◽  
Transportation Facilities

In this paper, the evaluation and prediction model of prefabricated plant site was established by BP neural network, which taking nine factors into consideration, such as location, topography, land scale, transportation facilities, availability of raw materials and labour. These nine factors were taken as input factors, and the normalized global value was taken as output factor. The normalized global value was used to evaluate the performance of prefabricated plant site. In addition, the model was verified to be accurate by analysing twelve prefabricated plant site samples. Therefore, it is obvious that the model is stable in operation with high precision, and can provide effective support in the selection of prefabricated plant site.

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