Comparison of different interpolation methods for DEM production

Alcaras, Emanuele

doi:10.30534/ijatcse/2019/91842019

Cited by 10 publications

(11 citation statements)

References 15 publications

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“…The results obtained in this study remark that the quality of a DDM is related to the choice of an appropriate interpolation method in order to fit the dataset, according to other studies on those aspects [11,34,42]. However, single beam echo sounder survey permits the availability of data that are not completely random: depth points are quite regularly distributed along the ship routes and that eases the interpolation process.…”

Section: Discussionmentioning

confidence: 53%

“…Interpolated points are estimated based on their distance from known values: for consequence, points that are adjacent to known values are more influenced than points that are distant [33]. In other terms, the values of the neighbouring measured points are weighted by the inverse of the distance at the calculated [34]. As a result, as the distance increases, the weights decrease rapidly [35].…”

Section: A the Idw Methodsmentioning

confidence: 99%

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Interpolation of Single Beam Echo Sounder Data for 3D Bathymetric Model

Parente¹,

Vallario²

2019

IJACSA

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Transmitting sound waves into water, and measuring time interval between emission and return of a pulse, single beam echo sounder determines the depth of the sea. To obtain a bathymetric model representing sea-floor continuously, interpolation is necessary to process irregular spaced measured points resulting from echo sounder acquisition and calculate the depths in unsampled areas. Several interpolation methods are available in literature and the choice of the most suitable of them cannot be made a priori, but requires to be evaluated each time. This paper aims to compare different interpolation methods to process single beam echo sounder data of the Gulf of Pozzuoli (Italy) for 3D model achievement. The experiments are carried out in GIS (Geographic Information System) environment (Software: ArcGIS 10.3 and its extension Geostatistical Analyst by ESRI). The choice of the most accurate digital depth model is made using automatic cross validation. Radial basis function and kriging prove to be the best interpolation methods for the considered dataset.

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Section: Discussionmentioning

confidence: 53%

Section: A the Idw Methodsmentioning

confidence: 99%

Interpolation of Single Beam Echo Sounder Data for 3D Bathymetric Model

Parente¹,

Vallario²

2019

IJACSA

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“…It is the result of the first echo the laser receives for each laser pulse sent out, and represents the tops of buildings, trees, and other objects, or the ground, if unobstructed [22]. As with DEMs (Digital Elevation Models) [23], a DSM is usually supplied like a grid, i.e. a sample of heights for a number of points that are spaced in regular way.…”

Section: A Adopted Approachmentioning

confidence: 99%

Temporal Analysis of GDOP to Quantify the Benefits of GPS and GLONASS Combination on Satellite Geometry

Meneghini¹,

Parente²

2020

IJACSA

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Global Navigation Satellite Systems (GNSS) have developed rapidly over the last few years. At present, there are GNSS receivers that combine satellites from two or more different constellations. The geometry of the satellites in relation to the receiver location, i.e. how nearly or distantly they are disposed in the sky, impacts on the quality of the survey, which is essential to achieve the highest level of position accuracy. A dimensionless number identified as Geometric Dilution of Precision (GDOP) is used to represent the efficiency of the satellite distribution and can be easy calculated for each location and time using satellite ephemeris. This paper quantifies the influence of multi-GNSS constellation, in particular GPS (Global Positioning System) and GLONASS (Globalnaya Navigazionnaya Sputnikovaya Sistema) combination, on satellite geometry considering a precise period. A new index named Temporal Variability of Geometric Dilution of Precision (TVGDOP) is proposed and analyzed in different scenarios (different cut-off angles as well as real obstacles such as terrain morphology and buildings). The new index is calculated for each of the two satellite systems (GPS and GLONASS) as well as for their integration. The TVGDOP values enable the three cases to be compared and permit to quantify the benefits of GNSS integration on satellite geometry. The results confirm the efficiency of the proposed index to highlight the better performance of combination GPS+GLONASS especially in presence of obstacles.

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“…They can be produced in different way, i.e. using 3D stereoscopic viewing photogrammetric methods [21], [22] or interpolating height points and/or contour lines [23], [24].…”

Section: Introductionmentioning

confidence: 99%

From electronic navigational chart data to sea-bottom models: Kriging approaches for the Bay of Pozzuoli

2021

Self Cite

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<p class="Abstract">Electronic Navigational Charts (ENCs), official databases created by a national hydrographic office and included in Electronic Chart Display and Information System (ECDIS), supply, among essential indications for safe navigation, data about sea-bottom morphology in terms of depth points and isolines. Those data are very useful to build bathymetric 3D models: applying interpolation methods, it is possible to produce a continuous representation of the seafloor for supporting studies concerning different aspects of a marine area, such as directions and intensity of currents, sensitivity of habitats and species, etc. Many interpolation methods are available in literature for bathymetric data modelling: among them kriging ones are extremely performing, but require deep analysis to define input parameters, i.e. semi-variogram models. This paper aims to analyze kriging approaches for depth data concerning the Bay of Pozzuoli. The attention is focused on the role of semi-variogram models for Ordinary and Universal kriging. Depth data included in two ENCs, namely IT400129 and IT400130, are processed using Geostatistical Analyst, an extension of ArcGIS 10.3.1 (ESRI). The results testify the relevance of the choice of the mathematical functions of the semi-variogram: Stable Model supplies, for this case study, the best performance in terms of depth accuracy for both Ordinary and Universal kriging.</p>

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Comparison of different interpolation methods for DEM production

Cited by 10 publications

References 15 publications

Interpolation of Single Beam Echo Sounder Data for 3D Bathymetric Model

Interpolation of Single Beam Echo Sounder Data for 3D Bathymetric Model

Temporal Analysis of GDOP to Quantify the Benefits of GPS and GLONASS Combination on Satellite Geometry

From electronic navigational chart data to sea-bottom models: Kriging approaches for the Bay of Pozzuoli

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