Izdelava metričnega prikaza dna Blejskega jezera na osnovi podatkov snemanja s sonarjem Lowrance Elite-5 HDI : diplomska naloga

Magyar, Jan (author), Kogoj, Dušan (mentor), Kregar, Klemen (co-mentor)

Diplomska naloga obravnava, kako iz ljubiteljskih hidrografskih meritev pridobiti model globin zadovoljive natančnosti. Konkretno gre za meritve s sonarjem Lowrance Elite-5 HDI, ki je namenjen za ribištvo in z njim povezane dejavnosti, s katerim je bilo posneto dno Blejskega jezera. Opisan je potek in način merjenja, uporabljen instrumentarij, obdelava podatkov ter različni grafični prikazi rezultata. Naloga se bolj podrobno dotakne načina interpolacije obdelanih meritev. Kako z določenimi funkcijami izvedemo ter izboljšamo interpolacijo meritev in z matričnim filtrom odstranimo grobe pogreške. Pomemben je tudi grafični vklop v obstoječe informacijske sisteme, kot je DOF 2011 (digitalni ortofoto). Za to je potrebna pravilna transformacija meritev v pravi koordinatni sistem. Kot rezultat dobimo model globin Blejskega jezera v različnih grafičnih prikazih. Izvede se tudi primerjava z obstoječimi podatki, ki so rezultat profesionalnih hidrografskih meritev. Tako dobimo primerjavo modela z obstoječimi podatki in lahko ocenimo natančnost dobljenega modela.

• Language: Slovenian
• Keywords: Hidrografske meritve, model globin, interpolacija, meritve globin, sonar
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: [J. Magyar]
• Year: 2017
• PID: 20.500.12556/RUL-96485
• UDC: 528.47(497.12 Bled)(043.2)
• COBISS.SI-ID: 8188769
• Publication date in RUL: 02.10.2017

Secondary language

• Language: English
• Title: Creation of a metric display of the bottom of the Lake Bled on the basis of Lowrance Elite-5 HDI sonar data recording : Graduation thesis

Abstract

This thesis deals with, how to get a model of heights with decent accuracy, from amateur hydrographic survey. Specifically measurements with Lawrance Elite-5 HDI sonar that is meant for fishing and other fishing activities, with which the bottom of the Lake Bled was measured. The course and method of measurements, use of instruments, processing of data and different graphical displays of results are described. More in depth the thesis is dealing with interpolation of processed data. How, with a different functions, one can execute and improve interpolations of measurements and get rid of the gross errors with matrix filter. Also important is graphical configuration with other informational systems like DOF 2011 (digital orthophoto). For that we need correct transformation of measurements in the right coordinate system. As a result we get a model of depth of Lake Bled in different graphical displays. We also do a comparison with a professionally made model, so we can evaluate accuracy of our results.

• Keywords: Hydrographic survey, depth model, interpolation, depth measurement, sonar