Analiza podatkov misije NASA GEDI

Župevec, Manca (author), Oštir, Krištof (mentor), Potočnik Buhvald, Ana (co-mentor)

Misija NASA GEDI (Global Ecosystem Dynamics Investigation) zagotavlja visokokakovostne meritve vertikalne strukture gozdov. Diplomska naloga zajema pregled podatkov, preverbo kakovosti, odstranitev slabih podatkov, izpeljavo GEDI produktov stopnje obdelave L2A in L2B, kot so višina krošenj, nadmorska višina, meritve RH, indeks listne površine in gostota prostornine vegetacije ter pretvorbo v primeren format (GeoJSON), ki omogoča analizo v odprtokodnem programu QGIS. V QGIS-u so podatki grafično prikazani. Nazadnje je izvedena primerjava višin krošenj GEDI s podatki Zavoda za gozdove Slovenije ter Gozdarskega inštituta Slovenije. Na podlagi razlik smo ocenili uporabno vrednost globalnega podatkovnega niza GEDI na ozemlju Slovenije.

• Language: Slovenian
• Keywords: GEDI, lidar, valovna dolžina, višine krošenj, vertikalna struktura gozda, geolokacija
• Work type: Bachelor thesis/paper
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Year: 2024
• PID: 20.500.12556/RUL-154361
• Publication date in RUL: 08.02.2024

Secondary language

• Language: English
• Title: NASA GEDI Mission Data Analysis

Abstract

The NASA GEDI (Global Ecosystem Dynamics Investigation) mission provides high-quality measurements of vertical forest structure. The thesis includes data overview, quality verification, removal of poor data, derivation of GEDI Level 2A and 2B products such as canopy height, elevation, RH measurements, leaf area index, and vegetation volume density, followed by conversion into an appropriate format (GeoJSON) for analysis in the open-source QGIS software. In QGIS, the data is visually represented. Lastly, a comparison between GEDI canopy heights and data from the Slovenian Forestry Institute and the Slovenian Forestry Research Institute is conducted. Based on the differences, the practical utility of the global GEDI dataset on Slovenian territory is assessed.

• Keywords: GEDI, lidar, waveform, canopy height, vertical structure of the forest, geolocation