Analytical and numerical methods of converting Cartesian to ellipsoidal coordinates

Πάνου, Γεώργιος; Korakitis, R.

doi:10.1515/jogs-2020-0126

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…According to the measured geometrical parameters of the Camellia oleifera flower, the Camellia oleifera flower of the "Sanhua" variety is ellipsoidal during the budding periodthe parameters are simplified for the theoretical calculation and analysis-and the Camellia oleifera flower is simplified to an ellipsoidal model [29,30]. A spatial coordinate system (Oxyz) is established, where the coordinate origin O coincides with the geometric center.…”

Section: Geometric Model Analysis Of Camellia Oleifera Flowersmentioning

confidence: 99%

Design and Research of a Harvesting Actuator for Camellia oleifera Flowers during the Budding Period

Zhao

et al. 2022

Agriculture

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The collection of Camellia oleifera flowers is a key foundation of Camellia oleifera flower pollen extraction. Due to the current problems of low efficiency, high labor intensity and the high cost of manual collection of Camellia oleifera flowers, a harvesting actuator was designed. By analyzing the inherent characteristics of the Camellia oleifera flower and the harvesting method, a harvesting structure using a combination of friction roller twisting harvesting and pipeline pneumatic conveying was designed. The geometric model of the Camellia oleifera flower was established and the motion analysis of the flower was carried out, which indicated that the Camellia oleifera flower would tend to a stable state for easy picking after entering the actuator. Using Automatic Dynamic Analysis of Mechanical Systems 2015 software (ADAMS, MSC. Software Corporation, Santa Ana, CA, USA) to simulate the process of Camellia oleifera flower picking, a mechanical analysis was performed in the contact plane to prove the theoretical feasibility of friction roller picking these flowers, and the main influencing factor was obtained as the speed of the friction roller. The test prototype for Camellia oleifera flower picking was built, and the picking experiment was implemented to study the effect of motor speed on the picking time of single Camellia oleifera flowers and the effect of the success rate of the flower picking. The test results show that when the motor speed is 400 r/min, the picking success rate is 96%, the picking time of a single flower is 1.2 s, and the speed of the machine collection of Camellia oleifera flowers is 2.3 times that of manual collection, which proves the realistic feasibility of this picking actuator. This paper provides an important reference and basis for the research and development of a flower harvesting actuator.

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Section: Geometric Model Analysis Of Camellia Oleifera Flowersmentioning

confidence: 99%

Design and Research of a Harvesting Actuator for Camellia oleifera Flowers during the Budding Period

Zhao

et al. 2022

Agriculture

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“…rigorous computer methods which determine the quantitative characteristics of features with high accuracy with a practically infinite sum of members in the Taylor series [Karney, 2011;Pędzich & Kuźma, 2012;Karney, 2013;Huang, 2017;Berk & Ferlan, 2018;Setiawan & Sediyono, 2020;Baselga & Olsen, 2021;Marx, 2021;Panou & Korakitis 2021].…”

Section: Introductionmentioning

confidence: 99%

Geodesy, Cartography and Aerial Photography

Kin¹,

Karpinskyi²

2022

ISTCGCAP

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The aim of this work – research of topological inconsistencies during adjustment and junction of adjacent map sheets of digital topographic maps of scale 1:50000 with the use of rigorous analytical geodetic methods on the reference ellipsoid in the geoinformation environment. The research analyzes the phenomenon of topological inconsistencies of frames of adjacent digital topographic maps of 1:50000 scale within the zones of Gauss-Krueger projections and the feasibility of transition to rigorous analytical geodetic methods in the geoinformation environment during the creation of the topographic database “The Main state topographic map” by determining the differences between the vertices of the frames of digital topographic maps at a scale of 1: 50000 at the boundaries of the projection zones. This phenomenon was discovered during work at the state enterprise “Research Institute of Geodesy and Cartography”. The dependences are shown and analyzed, which show the changes in the distances between the vertices of the frames of adjacent map sheets of scale 1: 50000 in longitude and latitude. These values range from 1 mm to 8 mm, which leads to topological inconsistencies in the form of gaps and overlaps of adjacent map sheets. These gaps and overlaps complicate the process of adjustment of map sheets and make it impossible to automate the process of the junction of features into the topographic database. The scientific novelty of the research is to justify the use of rigorous analytical geodetic methods and tools instead of analog cartometric and standard methods of instrumental GIS; the use of a reference ellipsoid, not just cartographic projections, a spheroid or a sphere. The practical significance of research is the use of rigorous analytical geodetic methods that significantly minimize the values of gaps and overlaps, as the establishment of tolerances for these values does not automate the process of correct adjustment and junction of map sheets. The performed research can be used to create the topographic database “The Basic topographic map scale 1: 10000”, during the creation and updating of geospatial data in the geoinformation environment and the implementation of geodetic methods to determine the cartometric characteristics of features using GIS. Given the results of research, we can conclude that the present stage of application of geographic information systems in topographic and geodetic activities requires increasing the level of data topology and accuracy of all cartometric methods, which leads to the transition to extremely rigorous analytical geodetic methods directly on the reference ellipsoid.

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Proposal for a Unique Cartographic Projection System for the Galapagos Islands in Order to Generate Cartography at Large Scales

Luna

Almeida

Cisneros

et al. 2023

Communications in Computer and Information Science

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Analytical and numerical methods of converting Cartesian to ellipsoidal coordinates

Cited by 5 publications

References 10 publications

Design and Research of a Harvesting Actuator for Camellia oleifera Flowers during the Budding Period

Design and Research of a Harvesting Actuator for Camellia oleifera Flowers during the Budding Period

Geodesy, Cartography and Aerial Photography

Proposal for a Unique Cartographic Projection System for the Galapagos Islands in Order to Generate Cartography at Large Scales

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