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Primerjava višin iz lidarskih podatkov in GNSS-višinomerstva na območju Prevalje pod Krimom : diplomska naloga
Možina, Meta (Author), Pavlovčič Prešeren, Polona (Mentor) More about this mentor... This link opens in a new window, Vrečko, Anja (Co-mentor), Zavodnik Lamovšek, Alma (Thesis defence commission member)

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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.

Language:Slovenian
Keywords:geodezija, diplomska naloga, UNI, GIG, GNSS-višinomerstvo, lidar, RTK-metoda izmere, metoda naravnih sosedov, laserski skenerji, DMR, ortofoto
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2014
Publisher:M. Možina
Number of pages:XII, 25 str.
Place:Ljubljana
UDC:528.2(497.4)(043.2)
COBISS.SI-ID:6751585 This link opens in a new window
Views:1604
Downloads:560
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Secondary language

Language:English
Title:Comparison of heights from lidar data and from GNSS levelling in the area of Prevalje pod Krimom
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.

Keywords:GNSS levelling, lidar, RTK surveying, natural neighbor method, laser scanner, DTM, orthophoto

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