magistrsko delo
Lucija Cigelšek (Author), Polona Pavlovčič Prešeren (Mentor), Mojca Kosmatin Fras (Co-mentor), Dejan Grigillo (Co-mentor)

Abstract

Ortofoto je med uporabniki zelo priljubljen, vendar za kontrolo njegove kakovosti v Sloveniji nimamo obvezujočega standarda. Kontrola se izvaja sistematično ob izvajanju projekta Cikličnega aerofotografiranja Slovenije in ob podpori znanstveno-tehničnega poročila (Kapnias et al., 2008). V tujini se za kontrolo položajne točnosti prostorskih podatkov uporabljajo številni standardi, med katerimi lahko z vidika aktualnosti izpostavimo Nacionalni standard za oceno točnosti prostorskih podatkov (NSSDA) in Sporazum o standardizaciji 2215 (STANAG 2215). Ker se standarda precej razlikujeta v velikosti vzorca in statističnem modelu, smo ju v magistrskem delu praktično preizkusili na primeru kontrole državnega ortofota iz časovne serije 2014 na območju trigonometrične sekcije Celje. Izmerili smo kontrolne točke na ortofotu, na stereoparih in pridobili referenčne vrednosti z RTK-metodo izmere GNSS. Podatke smo obdelali po metodologijah obeh standardov in jih ovrednotili. Za dva lista smo izdelali ortofoto z uporabo DMR 1, pridobljenega iz podatkov laserskega skeniranja, ter preverili ali so se odstopanja na kontrolnih točkah zmanjšala. Predstavili smo ugotovitve in podali naše mnenje za uvedbo standarda STANAG 2215 v kontrolo položajne točnosti državnega ortofota v Sloveniji.

Keywords

geodezija;magistrska dela;ortofoto;GNSS;stereofotogrametrija;kakovost;položajna točnost;standard;NSSDA;STANAG 2215;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [L. Cigelšek]
UDC: 528.715(043.3)
COBISS: 7752545 Link will open in a new window
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Downloads: 586
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Other data

Secondary language: English
Secondary title: Positional accuracy control of national orthophoto with GNSS positioning
Secondary abstract: Orthophoto is very popular among the users, but its quality is not regulated, since there is no mandatory quality control standard existent in Slovenia. Quality check is performed systematically during the implementation of the project of the Cyclic Aerial Survey of Slovenia and with the support of the scientific and technical report (Kapnias et al., 2008). A number of standards are being used abroad to control the positional accuracy of spatial data, among which the most relevant are the National Standard for Spatial Data Accuracy (NSSDA) and the Standardization Agreement 2215 (STANAG 2215). Since both standards differ considerably in the size of the sample and the statistical model, they were put to test in the master thesis by using them to control the quality of the national orthophoto from the 2014 time series in the trigonometric district of Celje. The orthophoto and stereopair control points were measured and reference values were obtained by the GNSS RTK method. Data was processed by using the methodology of both standards and the standards were subsequently evaluated. Orthophoto was produced for two sections by using DMR 1 obtained from the laser scan data, and the reduction in variation at control points was examined. The results were interpreted and STANAG 2215 was suggested as the national standard for measuring the quality of positional accuracy of orthophoto in Slovenia.
Secondary keywords: geodesy;master of science thesis;orthophoto;GNSS;stereophotogrammetry;quality;positional accuracy;standard;NSSDA;STANAG 2215;
File type: application/pdf
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XIV, 62 str., 8 pril.
ID: 9227916