Funkcionalnosti programa GRASS za topografske analize po metodologiji sledenja vodnega toka : diplomska naloga

Poljanšek, Sašo (author), Šumrada, Radoš (mentor)

V diplomski nalogi sem pod drobnogled vzel prosti in odprtokodni programski paket GRASS (Geographic Resources Analysis Support System), ki velja za enega izmed najcelovitejših in večnamenskih »namiznih« orodij GIS (geografski informacijski sistem). Osredotočil sem se na pregled programskih modulov GRASS za izvajanje topografskih analiz, ki temeljijo na metodologiji sledenja oz. usmerjanja vodnega toka, in prikaz uporabe njihovih funkcionalnosti na stvarnem primeru. Diplomska naloga je razdeljena na dva dela. V prvem delu, ki je teoretično obarvan, so obravnavani geografski informacijski sistemi, prosto in odprtokodno programje, GRASS in metodologija, ki se v obravnavanih modulih uporablja za izračun analiz. Drugi del naloge je bolj praktično naravnan. V njem sta zajeta podrobnejša predstavitev in opis modula za izračun topografskih analiz, ki prikazujejo značilnosti terena v določeni točki in modulov za izračun topografskih analiz, ki temeljijo na metodologiji sledenja oziroma usmerjanja vodnega toka. V tem delu je predstavljeno tudi celotno delo s programom GRASS. Izdelane prostorske analize, s katerimi je prikazana uporaba funkcionalnosti modulov na stvarnem primeru, so v nalogi predstavljene v obliki različnih 2D-, 2,5D- ali 3D-prikazov. Za aproksimacijo dejanskega površja je v nalogi uporabljen rastrski višinski sloj DMV (digitalni model višin), ki sem ga ustvaril iz podatkov DMV z ločljivostjo 12,5 m. Prostorske analize so izdelane za območje, ki pokriva večji del občine Kamnik in njene bližnje okolice.

• Language: Slovenian
• Keywords: geodezija, diplomska dela, UNI, geografski informacijski sistemi, odprtokodno programje, topografske analize
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [S. Poljanšek]
• Year: 2012
• Number of pages: XVI, 105 str.
• PID: 20.500.12556/RUL-32690
• UDC: 519.6:528.4:659.2:91(043.2)
• COBISS.SI-ID: 6120545
• Publication date in RUL: 10.07.2015

Secondary language

• Language: English
• Title: Funcionality of GRASS software for topographic analysis for the methodology of tracking water flow

Abstract

In the thesis I thoroughly examined the free and open-source software package GRASS (Geographic Resources Analysis Support System), which is considered as being one of the most comprehensive and multi-purpose »Desktop« GIS (Geographic Information System). I focused on the review of GRASS software modules for carrying out topographical analyses, which are based on the methodology of tracking or routing of water flow, and on the display of their functionality in a real case. The thesis is divided into two parts. In the first part, which is theoretical, deals with geographic information systems, free and open-source software, GRASS and the methodology used in the present modules to express the analyses calculations. The second part of the thesis is more practical. It covers the presentation and description of the module for the calculation of the topographical analysis which are showing the terrain characteristics in a certain point and modules for topographical analysis calculations, based on the methodology of tracking or routing of water flow. This part also presents my entire work with the GRASS. Constructed spatial analyses, which show the use of the functionality of the modules on a real case, are presented in the form of different types of 2D-, 2.5D or 3D-displays. For approximation of the actual surface I used raster DEM (Digital Elevation Model), which I created from the DEM data with the resolution of 12,5 m. Spatial analysis were made for the area that covers the main part of the municipality of Kamnik and its nearby surroundings.

• Keywords: graduation thesis, geodesy, flow routing, flow tracing, open-source software, geographic information systems