scholarly journals Analysis of Underwater Topographic Survey of Stilling Basin Based on Unmanned Survey System

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Hui Xie ◽  
Haoran Wang ◽  
Yayi Yang ◽  
Yongcan Chen ◽  
Jun Yang ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Structural Abnormality ◽  
Maximum Height ◽  
Application Research ◽  
Stilling Basin ◽  
Underwater Topography ◽  
Topographic Survey ◽  
Global Positioning ◽  
Survey System ◽  
Gps Rtk

The combination of Global Positioning System-Real Time Kinematic (GPS-RTK) and depth sounder is an important technical method of modern underwater topographic survey. In this paper, the combined technology was integrated with unmanned surface vehicle (USV) technology to construct an unmanned survey system suitable for underwater topographic survey in stilling basin, and it was applied to survey the underwater topography of the stilling basin of Tingzikou hydrojunction project. Based on the surveying and mapping data and 3D model, the trend of elevation change of the stilling basin including apron, end sill, antiscour section, and river convergence section was analyzed. The results show that, for the surface outlet stilling basin of Tingzikou, after flood, the structure is complete, the boundaries are clear, the water quality is good, and there is little sediment on the surface of apron from overflow dam section to end sill. Furthermore, no obvious sediment or structural abnormality has been found in the still basin. Affected by the bedrock and cofferdam cobble gravel sediment, the elevation of the antiscour section and the downstream convergence section of the surface outlet stilling basin increased significantly. For the bottom outlet stilling basin of Tingzikou, there is large sediment within a range of 20 m∼40 m from the bottom sill and the maximum height of it reaches 2.04 m, while there is no obvious sediment or structural abnormality in the remaining region of basin. The critical sedimentation height can effectively judge the safety grade of the sedimentation height in stilling basin and provide a reliable support for assessing the overall safety of stilling basin. The application of unmanned survey technology improves the accuracy and timeliness of underwater topography and sedimentation distribution of stilling basin, which has significant application research value and promotion significance.

scholarly journals Kajian Perbandingan Luas Hasil Pengukuran Bidang Tanah Menggunakan GPS RTK-Radio dan RTK-NTRIP

2021 ◽  
Vol 4 (1) ◽  
pp. 65
Author(s):  
Rizki Irianto ◽  
Farouki Dinda Rassarandi
Keyword(s):  
Real Time ◽  
Global Positioning System ◽  
Positioning System ◽  
Total Station ◽  
Global Positioning ◽  
Gps Rtk

Dengan berkembangnya teknologi dalam survei pemetaan seperti halnya penggunaan GPS Geodetik, maka penerapan dari teknologi untuk kebutuhan survei perlu memperhatikan faktor-faktor tertentu seperti ketersediaan alat, sumber daya manusia hingga kondisi lapangan. GPS atau biasa dikenal dengan Global Positioning System merupakan teknologi/alat atau sistem yang memberikan informasi berupa posisi kepada pengguna secara global dan real-time di permukaan bumi yang berbasis data satelit. Dengan teknologi tersebut diperoleh ketelitian yang tinggi dengan waktu yang singkat dalam penentuan sebuah posisi. Penelitian ini bertujuan untuk mengetahui ketelitian hasil pengukuran luas bidang tanah menggunakan teknologi GPS RTK-Radio dan GPS RTK NTRIP sebagai sikap pengambilan keputusan. Penelitian dilakukan terhadap daerah dengan obstruksi dan tanpa obstruksi fisik. Nantinya, dari penelitian ini diperoleh nilai-nilai koordinat (X,Y) dari GPS RTK-NTRIP maupun RTK-Radio, yang kemudian dihitung luasnya dan dibandingkan dari hasil pengukuran menggunakan ETS (Electronic Total Station) terhadap standar ketelitian luas dari BPN. Hasil perhitungan selisih luas lahan baik dengan obstruksi secara fisik maupun tidak, masih masuk dalam toleransi ketelitian BPN, walaupun untuk lahan yang terdapat obstruksi fisik memiliki selisih antara pengukuran menggunakan GPS dan ETS yang cukup besar yaitu hampir mencapai 5 m2.

AQUIFER MAPPING USING AEM SKYTEM

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Balendhu Shaji
Keyword(s):  
Global Positioning System ◽  
Geophysical Survey ◽  
Positioning System ◽  
Electrically Conductive ◽  
Global Positioning ◽  
Survey System

The new tool is called SkyTEM. It’s an aerial geophysical survey system towed by helicopter that measures aquifers electronically. SkyTEM uses electromagnetics, a global positioning system, lasers, loggers, and a computer strapped to a giant hexagonshaped frame. Constructed from nonconductive fiberglass and wood, the frame will not interfere with SkyTEM’s electronics as they probe the ground for electrically conductive layers. Ringing the bottom of the frame is a cable of wound copper wires that acts as a transmitter.

scholarly journals Evaluation of GPS-RTK and Total Station for Topographic Survey and Strategic Decision in Private Companies

2019 ◽  
Author(s):  
Mohammad Idris
Keyword(s):  
Strategic Decision ◽  
Time Saving ◽  
Private Companies ◽  
Contour Map ◽  
Detailed Measurement ◽  
Total Station ◽  
Topographic Survey ◽  
Survey System ◽  
Survey Results ◽  
Gps Rtk

An accurate and efficient survey system is needed for survey based private companies to survive in the business and engineering world. Accuracies of GPS-RTK (Global Positioning System-Real Time Kinematic) system and TS (Total Station) were investigated in a topographic survey. The hypothesis proposed was that GPS-RTK system could be an alternative survey for moderate accuracy projects. 5.90 ha salt ponds area became a sample for the research. Full detailed measurement was conducted by both instruments to build a contour map. Time expenditure was recorded to identify each method of effectiveness. Maximum offset of elevation was 0.054 m (polygon) and 0.098 m (detail). The survey results demonstrated that even though GPS-RTK system was not only practical and efficient (time saving reached 30% verses TS and 33% more efficient in human resources) but also yielded acceptable accurate topographic maps for moderate accuracy engineering purposes, GPS-RTK system cannot be conducted for every terrain feature.

scholarly journals The Rosario dataset: Multisensor data for localization and mapping in agricultural environments

2019 ◽  
Vol 38 (6) ◽  
pp. 633-641 ◽  
Author(s):  
Taihú Pire ◽  
Martín Mujica ◽  
Javier Civera ◽  
Ernesto Kofman
Keyword(s):  
Global Positioning System ◽  
Mobile Robotics ◽  
Sensor Data ◽  
Measurement Unit ◽  
Direct Sunlight ◽  
Localization And Mapping ◽  
Global Positioning ◽  
Gps Rtk ◽  
Autonomous Mobile Robotics ◽  
Multisensor Data

In this paper we present the Rosario dataset, a collection of sensor data for autonomous mobile robotics in agricultural scenes. The dataset is motivated by the lack of realistic sensor readings gathered by a mobile robot in such environments. It consists of six sequences recorded in soybean fields showing real and challenging cases: highly repetitive scenes, reflection, and burned images caused by direct sunlight and rough terrain among others. The dataset was conceived in order to provide a benchmark and contribute to the agricultural simultaneous localization and mapping (SLAM)/odometry and sensor fusion research. It contains synchronized readings of several sensors: wheel odometry, inertial measurement unit (IMU), stereo camera, and a Global Positioning System real-time kinematics (GPS-RTK) system. The dataset is publicly available from http://www.cifasis-conicet.gov.ar/robot/ .

GPS and GSM Based Tracking System for Objects Moving over Wide Geographical Areas

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fatima Ameen ◽  
Ziad Mohammed ◽  
Abdulrahman Siddiq
Keyword(s):  
Global Positioning System ◽  
Mobile Communications ◽  
Moving Objects ◽  
Tracking System ◽  
Geographical Area ◽  
Tracking Systems ◽  
Acceptable Result ◽  
Internet Service ◽  
Global Positioning ◽  
Tracking Objects

Tracking systems of moving objects provide a useful means to better control, manage and secure them. Tracking systems are used in different scales of applications such as indoors, outdoors and even used to track vehicles, ships and air planes moving over the globe. This paper presents the design and implementation of a system for tracking objects moving over a wide geographical area. The system depends on the Global Positioning System (GPS) and Global System for Mobile Communications (GSM) technologies without requiring the Internet service. The implemented system uses the freely available GPS service to determine the position of the moving objects. The tests of the implemented system in different regions and conditions show that the maximum uncertainty in the obtained positions is a circle with radius of about 16 m, which is an acceptable result for tracking the movement of objects in wide and open environments.

Aplikasi Pemosisi Lokal Berbasis Android Dengan Menggunakan GPS

INTI TALAFA ◽  
2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Yaman Khaeruzzaman
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Database Server ◽  
Global Positioning

Seiring dengan pesatnya kemajuan teknologi saat ini, kebutuhan manusia menjadi lebih beragam, termasuk kebutuhan akan informasi. Tidak hanya media informasinya yang semakin beragam, jenis informasi yang dibutuhkan juga semakin beragam, salah satunya adalah kebutuhan informasi akan posisi kita terhadap lingkungan sekitar. Untuk memenuhi kebutuhan itu sebuah sistem pemosisi diciptakan. Sistem pemosisi yang banyak digunakan saat ini cenderung berfokus pada lingkup ruang yang besar (global) padahal, dalam lingkup ruang yang lebih kecil (lokal) sebuah sistem pemosisi juga diperlukan, seperti di ruang-ruang terbuka umum (taman atau kebun), ataupun dalam sebuah bangunan. Sistem pemosisi lokal yang ada saat ini sering kali membutuhkan infrastruktur yang mahal dalam pembangunannya. Aplikasi Pemosisi Lokal Berbasis Android dengan Menggunakan GPS ini adalah sebuah aplikasi yang dibangun untuk memenuhi kebutuhan pengguna akan informasi lokasi dan posisi mereka terhadap lingkungan di sekitarnya dalam lingkup ruang yang lebih kecil (lokal) dengan memanfaatkan perangkat GPS (Global Positioning System) yang telah tertanam dalam perangkat smartphone Android agar infrastruktur yang dibutuhkan lebih efisien. Dalam implementasinya, Aplikasi Pemosisi Lokal ini bertindak sebagai klien dengan dukungan sebuah Database Server yang berfungsi sebagai media penyimpanan data serta sumber referensi informasi yang dapat diakses melalui jaringan internet sehingga tercipta sebuah sistem yang terintegrasi secara global. Kata kunci: aplikasi, informasi, pemosisi, GPS.

The Distribution of Hospitality Services in Uyo Urban, Nigeria

2018 ◽  
pp. 137-150
Author(s):  
Violet Bassey Eneyo
Keyword(s):  
Data Collection ◽  
Global Positioning System ◽  
Central Area ◽  
Positioning System ◽  
Nearest Neighbour ◽  
Global Positioning ◽  
Neighbour Analysis

This paper examines the distribution of hospitality services in Uyo Urban, Nigeria. GIS method was the primary tool used for data collection. A global positioning system (GPS) Garmin 60 model was used in tracking the location of 102 hospitality services in the study area. One hypothesis was stated and tested using the nearest neighbour analysis. The finding shows evidence of clustering of the various hospitality services. The tested hypothesis further indicated that hospitality services clustered in areas that guarantee a sustainable level of patronage to maximize profit. Thus, the hospitality services clustered in selected streets in the metropolis while limited numbers were found outside the city’s central area.

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