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Geomatics Application for Geography

Geographia Technica Special Issue 2021

 

An International Journal of Technical Geography

ISSN 2065-4421 (Online); ISSN 1842-5135 (printed)

 

 

1 4d Geomatics Monitoring of a Quarry for the Calculation of Extracted Volumes by TIN and Grid Model: Contribute of Uav Photogrammetry
Page 1-14
Massimiliano PEPE, Domenica COSTANTINO, Vincenzo Saverio ALFIO, Nicola ZANNOTTI
| Abstract | - November, 2020
2 A Kalman Filter Single Point Positioning for Maritime Applications Using a Smartphone
Page 15-29
Anna INNAC, Antonio ANGRISANO, Gino DARDANELLI, Vincenzo DELLA CORTE, Elena MARTELLATO, Alessandra ROTUNDI, Giampaolo FERRAIOLI, Pasquale PALUMBO, Salvatore GAGLIONE
| Abstract | - December, 2020

Geographia Technica, Vol 16, Special Issue, 2021, pp. 15-29

A KALMAN FILTER SINGLE POINT POSITIONING FOR MARITIME APPLICATIONS USING A SMARTPHONE

Anna INNAC , Antonio ANGRISANO , Gino DARDANELLI , Vincenzo DELLA CORTE , Elena MARTELLATO , Alessandra ROTUNDI , Giampaolo FERRAIOLI , Pasquale PALUMBO , Salvatore GAGLIONE

DOI: 10.21163/GT_2021.163.02

ABSTRACT: Different positioning techniques have been largely adopted for maritime applications that require high accuracy kinematic positioning. The main objective of the paper is the performance assessment of a Single Point Positioning algorithm (SPP), with a Kalman filter (KF) estimator, adapted for maritime applications. The KF has been chosen as estimation technique due to the ability to consider both the state vector dynamic and the measurements. Particularly, in order to compute an accurate vertical component of the position, suitable for maritime applications, the KF settings have been modified by tuning the covariance matrix of the process noise. The algorithm is developed in Matlab environment and tested using multi-GNSS single-frequency raw data, collected by a smartphone located on board a moving ship. The algorithm performance evaluation is carried out in position domain and the results show an enhancement of meter order on vertical component compared to the classical SPP based on Least Square estimation technique. In addition, different GNSSs configurations are considered to verify the benefits of their integration in terms of accuracy, solution availability and geometry.


Keywords: Single Point Positioning; GNSS; Vessel; Smartphone

Full article here

 

 

Geographia Technica, Vol 16, Special Issue, 2021, pp. 1-14

4D GEOMATICS MONITORING OF A QUARRY FOR THE CALCULATION OF EXTRACTED VOLUMES BY TIN AND GRID MODEL: CONTRIBUTE OF UAV PHOTOGRAMMETRY

Massimiliano PEPE  , Domenica COSTANTINO , Vincenzo Saverio ALFIO, Nicola ZANNOTTI

DOI: 10.21163/GT_2021.163.01

ABSTRACT: The purpose of this manuscript is to identify an appropriate survey technique and numerical method for the calculation of volumes extracted in a quarry. The impact of the TIN (Triangulated Irregular Network) and GRID method was evaluated firstly on a hypothetical stepped ground and one with a constant slope and, later, on a specific case study of a quarry of an important dimensions. In this case study, the survey at time to was performed by ALS (Airborne Laser Scanning) and at time t1 by the use of UAV (Unmanned Aerial Vehicle) photogrammetry. In the latter survey, the ease and speed in performing the 3D model by UAV photogrammetry was shown in the manuscript. Concerning the calculation of the volume over time, it has been shown how the TIN allows a calculation which is closer and more faithful to the reality than to the GRID model, in case the quarry conformation is in steps and, consequently, with important nearly vertical surfaces.


Keywords: UAV photogrammetry, quarry, TIN, GRID, SfM

Full article here