Primerjava višin iz lidarskih podatkov in GNSS-višinomerstva na območju Prevalje pod Krimom

diplomska naloga

Meta Možina (Author), Polona Pavlovčič Prešeren (Mentor), Alma Zavodnik Lamovšek (Thesis defence commission member), Anja Vrečko (Co-mentor)

Abstract

V diplomski nalogi primerjamo višine točk, interpolirane iz lidarskih podatkov, z višinami, ki smo jih pridobili s terensko izmero z GNSS-višinomerstvom na območju Ljubljanskega barja, v vasi Prevalje pod Krimom. Izbrali smo tri delovišča, za katera smo predvidevali, da so za lasersko skeniranje manj ugodna. To so: breg, brežina manjšega vodotoka in njiva z vegetacijo. Četrto delovišče je predstavljal raven travnik, ki naj bi bil enakovreden obema načinoma določevanja višin: z lidarjem in z GNSS-višinomerstvom. V okviru GNSS-višinomerstva smo na vseh štirih deloviščih opravili meritve z RTK-metodo izmere. Diskretno pridobljene točke smo uporabili za interpolacijo štirih ploskev z metodo naravnih sosedov, za vsa štiri delovišča. Višine iz interpoliranih ploskev smo primerjali z DMR-jem, ki je bil izdelan iz lidarskih podatkov. Ugotovili smo, da se višine na problematičnih območjih precej razlikujejo. Zato menimo, da je obravnavi višin iz lidarskih podatkov na podobnih območjih potrebno posvetiti posebno pozornost.

Keywords

geodezija;diplomska naloga;UNI;GIG;GNSS-višinomerstvo;lidar;RTK-metoda izmere;metoda naravnih sosedov;laserski skenerji;DMR;ortofoto;

Data

Language:	Slovenian
Year of publishing:	2014
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	M. Možina
UDC:	528.2(497.4)(043.2)
COBISS:	6751585
Views:	1980
Downloads:	590
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Comparison of heights from lidar data and from GNSS levelling in the area of Prevalje pod Krimom
Secondary abstract:	The scope of this work is comparison of heights, gathered from lidar data and GNSS-levelling in the particluar area Prevalje under Krim. Three working places were chosen, that were assumed to be less favorable for laser scaning: a river's edge, a slope and a field with vegetation. The fourth was a level meadow, where the results should be equivalent on both modes of height determination: lidar and GNSS levelling. In the context of GNSS levelling we have performed measurements with the real time kinematic method. From those points (also for all four worksites) four surfaces were interpolated using natural neighbor method. The heights of the interpolated planes were then compared with digital terrain model, which is made on the ground of lidar's data. We found out that heights of above mentioned questionable areas are quite variable. Therefore, we believe that the quality of heights from lidar data at this particular area as well as in similar areas should be treated with special attention.
Secondary keywords:	GNSS levelling;lidar;RTK surveying;natural neighbor method;laser scanner;DTM;orthophoto;
File type:	application/pdf
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XII, 25 str.
ID:	8708405