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Using Alternatives to Determine the Shallowest Depth for Bathymetric Charting : Case Study. / Mohammadloo, Tannaz H.; Snellen, Mirjam; Simons, Dick G.; Dierikx, Ben; Bicknese, Simon.

In: Journal of Surveying Engineering, Vol. 145, No. 4, 05019004, 01.11.2019.

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Mohammadloo, Tannaz H. ; Snellen, Mirjam ; Simons, Dick G. ; Dierikx, Ben ; Bicknese, Simon. / Using Alternatives to Determine the Shallowest Depth for Bathymetric Charting : Case Study. In: Journal of Surveying Engineering. 2019 ; Vol. 145, No. 4.

BibTeX

@article{b6fec1ca00e24c3ca0d31cb2686cf748,
title = "Using Alternatives to Determine the Shallowest Depth for Bathymetric Charting: Case Study",
abstract = "Methods for gridding multibeam echo sounder (MBES) measurements to equidistant grids are proposed as alternatives to the shallowest measured depth, which is affected by outliers. The approaches considered use a combination of mean and standard deviation of soundings and the regression coefficient from the best fitted plane. These methods along with mean and shallowest depths were applied to two surveyed areas. Two issues were found to be of importance, that is, a proper distribution of soundings and low uncertainties in the depth measurements. Improper sampling excludes using the method employing regression coefficients. For flat areas, the shallowest measured depth was found to be highly influenced by measurement uncertainties, counteracted when using the mean depth. However, the mean depth underestimates the shallowest depth for areas with slopes. When correcting the mean depth for standard deviation, the effect of slopes is accounted for while the influence of measurement uncertainties is decreased compared to shallowest measured depth. Since the uncertainties are dependent on beam angle, depth, and measurement equipment, these issues need to be accounted for in survey planning.",
keywords = "Bathymetry gridding, Mean depth, Regression coefficients, Shallowest depth, Standard deviation of depth measurements",
author = "Mohammadloo, {Tannaz H.} and Mirjam Snellen and Simons, {Dick G.} and Ben Dierikx and Simon Bicknese",
year = "2019",
month = "11",
day = "1",
doi = "10.1061/(ASCE)SU.1943-5428.0000278",
language = "English",
volume = "145",
journal = "Journal of Surveying Engineering",
issn = "0733-9453",
publisher = "American Society of Civil Engineers (ASCE)",
number = "4",

}

RIS

TY - JOUR

T1 - Using Alternatives to Determine the Shallowest Depth for Bathymetric Charting

T2 - Journal of Surveying Engineering

AU - Mohammadloo, Tannaz H.

AU - Snellen, Mirjam

AU - Simons, Dick G.

AU - Dierikx, Ben

AU - Bicknese, Simon

PY - 2019/11/1

Y1 - 2019/11/1

N2 - Methods for gridding multibeam echo sounder (MBES) measurements to equidistant grids are proposed as alternatives to the shallowest measured depth, which is affected by outliers. The approaches considered use a combination of mean and standard deviation of soundings and the regression coefficient from the best fitted plane. These methods along with mean and shallowest depths were applied to two surveyed areas. Two issues were found to be of importance, that is, a proper distribution of soundings and low uncertainties in the depth measurements. Improper sampling excludes using the method employing regression coefficients. For flat areas, the shallowest measured depth was found to be highly influenced by measurement uncertainties, counteracted when using the mean depth. However, the mean depth underestimates the shallowest depth for areas with slopes. When correcting the mean depth for standard deviation, the effect of slopes is accounted for while the influence of measurement uncertainties is decreased compared to shallowest measured depth. Since the uncertainties are dependent on beam angle, depth, and measurement equipment, these issues need to be accounted for in survey planning.

AB - Methods for gridding multibeam echo sounder (MBES) measurements to equidistant grids are proposed as alternatives to the shallowest measured depth, which is affected by outliers. The approaches considered use a combination of mean and standard deviation of soundings and the regression coefficient from the best fitted plane. These methods along with mean and shallowest depths were applied to two surveyed areas. Two issues were found to be of importance, that is, a proper distribution of soundings and low uncertainties in the depth measurements. Improper sampling excludes using the method employing regression coefficients. For flat areas, the shallowest measured depth was found to be highly influenced by measurement uncertainties, counteracted when using the mean depth. However, the mean depth underestimates the shallowest depth for areas with slopes. When correcting the mean depth for standard deviation, the effect of slopes is accounted for while the influence of measurement uncertainties is decreased compared to shallowest measured depth. Since the uncertainties are dependent on beam angle, depth, and measurement equipment, these issues need to be accounted for in survey planning.

KW - Bathymetry gridding

KW - Mean depth

KW - Regression coefficients

KW - Shallowest depth

KW - Standard deviation of depth measurements

UR - http://www.scopus.com/inward/record.url?scp=85068817476&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)SU.1943-5428.0000278

DO - 10.1061/(ASCE)SU.1943-5428.0000278

M3 - Article

VL - 145

JO - Journal of Surveying Engineering

JF - Journal of Surveying Engineering

SN - 0733-9453

IS - 4

M1 - 05019004

ER -

ID: 55333833