A5029414682- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- 3D Surveying and Cultural Heritage
- Species Distribution and Climate Change
- Historical Geography and Cartography
- Geographic Information Systems Studies
- 3D Modeling in Geospatial Applications
- Leaf Properties and Growth Measurement
- Forest ecology and management
- Image Processing and 3D Reconstruction
- Cryospheric studies and observations
- Forest Ecology and Biodiversity Studies
- Urban Heat Island Mitigation
- Botany and Plant Ecology Studies
- Geochemistry and Geologic Mapping
- Soil Moisture and Remote Sensing
- Tree-ring climate responses
- Plant responses to elevated CO2
- Satellite Image Processing and Photogrammetry
- Advanced Computational Techniques and Applications
- Automated Road and Building Extraction
- Archaeological Research and Protection
- Manufacturing Process and Optimization
- Plant Ecology and Soil Science
- Remote-Sensing Image Classification
Charles University
2013-2025
Veleučilište Velika Gorica
2020
Aalborg University
2004-2011
Abstract A wide range of portable chlorophyll meters are increasingly being used to measure leaf content as an indicator plant performance, providing reference data for remote sensing studies. We tested the effect anatomy on relationship between optical assessments (Chl) against biochemically determined Chl a reference. Optical included measurements taken by four meters: three transmittance-based (SPAD-502, Dualex-4 Scientific, and MultispeQ 2.0), one fluorescence-based (CCM-300), vegetation...
The main challenge in the renewal and updating of Cadastre Real Estate Czech Republic is to achieve maximum efficiency but retain required accuracy all points register. paper discusses possibility using UAV photogrammetry laser scanning for cadastral mapping Republic. Point clouds from images scans together with orthoimages were derived over twelve test areas. Control check measured geodetic methods (RTK-GNSS total stations). detailed survey based on technologies was checked hundreds points,...
Abstract Global mapping of forest height is an extremely important task for estimating habitat quality and modeling biodiversity. Recently, three global canopy maps have been released, the map (GFCH), high‐resolution model Earth (HRCH), tree (GMTCH). Here, we assessed their accuracy usability biodiversity modeling. We examined by comparing them with reference models derived from airborne laser scanning (ALS). Our results show considerable differences between evaluated maps. The root mean...
Laboratory spectroscopy in visible and infrared regions is an important tool for studies dealing with plant ecophysiology early recognition of stress due to changing environmental conditions. Leaf optical properties are typically acquired a spectroradiometer coupled integration sphere (IS) laboratory or contact probe (CP), which has the advantage operating flexibility provision repetitive in-situ reflectance measurements. Experiments comparing spectra measured different devices device...
Heavy metal contamination, low pH and high substrate heterogeneity are multiple stress factors that often occur at the post-mining sites make difficult biological reclamation. Efficient tools for detection of status reclaimed vegetation needed. We tested potential visible to near-infrared (VNIR) spectroscopy detect stresses in Scots pine (Pinus sylvestris L.) acidic substrates rich As. The needle chemical traits (chlorophyll a + b – Cab; carotenoids Car; Car/Cab; relative water content RWC;...
This study focuses on the assessment of forest cover and disturbance changes in heavily polluted Ore Mountains (Czechia, Central Europe) during second half 20th century onward. It analyzes driving forces with reference to environmental, societal political development region. Anthropogenic air pollution, prevalently SO2 from adjacent coal-burning industry, caused extensive decline, especially between 1970s 1980s. The most affected tree species was main economical timber species, Norway...
Assessing the Change in Cover of Non-Indigenous Dwarf-Pine Using Aerial Photographs, a Case Study from Hrubý Jeseník Mts., Sudetes In addition to ongoing climate change, alpine ecosystems are also threatened by expansion non-indigenous species. Expansion dwarf pine ( Pinus mugo Turra) Mts. is an excellent example interactions between planted shrub and dominated grassland Based on comparison aerial photographs taken two different periods (1971/73 2003) we analyzed spatial changes cover. We...
Abstract To date, numerous automatic building detection methods using lidar data have been developed. However, in most cases the parameters used for evaluation of results are not specified, accuracy assessment cannot be readily compared or no result is performed at all. In this study, aspects analysed order to find a generally applicable approach comparison outline extraction methods. An area‐based has selected as suitable due its robustness, predictability and comparability between...
Abstract Filtering approaches on Global Ecosystem Dynamics Investigation (GEDI) data differ considerably across existing studies and it is yet unclear which method the most effective. We conducted an in‐depth analysis of GEDI's vertical accuracy in mapping terrain canopy heights three study sites temperate forests grasslands Spain, California, New Zealand. started with unfiltered (2,081,108 footprints) describe a workflow for filtering using Level 2A parameters geolocation error mitigation....
Abstract. Time series (TS) analysis has always been an important topic in Remote Sensing (RS). Open access to archives of Earth Observation missions, periodically acquired nation-wide aerial imagery and LiDAR point clouds, various research datasets, together with open tools for TS data processing, have brought new possibilities RS but also challenges education. The become essential part MSc curricula geoinformatics, geography, related fields. learning materials systematically addressing the...
Nowadays, gathering information about tree health conditions in cities is necessary. Trees are essential regulating urban microclimate and mitigating the heat island effect. Therefore, their status should be crucial vegetation monitoring. The growing number of new cameras, sensors research methods allows for a broader application thermal data remote sensing studies. This aimed to evaluate whether it possible use infrared assess condition selected species deciduous trees an environment. More...
Abstract. Point clouds derived from UAV-borne laser scanning and photogrammetry provide new opportunities for 3D topographic monitoring in geographic research. The airborne acquisition strategy overcomes common challenges of ground-based techniques, such as limited spatial coverage or heterogeneous measurement distribution, allows flexible repeated acquisitions at high temporal resolution. While sensing techniques are expected to thereby enhance monitoring, their specific potential methods...
Abstract. Forests have always been a major concern for public authorities given their significant role as resource timber production, well climate regulation. The infestation of bark beetles poses challenging problem in forests, causing tree mortality, reduced quality, and ecosystem disruption. Multispectral imagery (MS) captured from unmanned aerial vehicles (UAVs) are increasingly employed forest health assessment extensively used to map the mortality caused by beetles. However, its...
Abstract. The study focuses on the determination of chlorophyll content in four prevailing grasses relict arctic-alpine tundra located Krkonoše Mountains National Park, Czech Republic. We compared two methods for leaf (LCC) – spectrophotometric laboratory, and LCC assessed by fluorescence portable meter CCM-300. Relationships were established between LCCs vegetation indices calculated from spectra acquired with contact probe coupled an ASD FieldSpec4 Wide-Res spectroradiometer. Canopy...
The checking of the geometric accuracy orthoimages and digital elevation models (DEMS) is discussed. As a reference, an existing orthoimage second derived from overlapping aerial image, are used. proposed automated procedures for DEMs based on matching corresponding image patches. Existing topographic databases additionally used in order to select time-invariant objects as checkpoints. In avoid blunders correlation, thresholds similarity measures applied. Detailed studies show that...
<em>The method of building outline extraction based on segmentation airborne laser scanning data is proposed and tested a dataset comprising 1,400 buildings typical for residential industrial urban areas. The algorithm starts with setting special threshold to separate from bare earth points low objects. Next, local planes are fitted each point using RANSAC further refined by least squares adjustment. A normal vector assigned point. Similarities among vectors evaluated in order assemble...
Abstract. EuroSDR (http://www.eurosdr.net/) is a non-profit organisation that provides pan-European network brings together mapping / cadastre agencies and academia for the purpose of applied research, securing timely, research-based knowledge allows to play their role as content providers government competence centres geographic information spatial data infrastructures. recognised provider Europe where citizens can readily benefit from information. Its mission develop improve methods,...
Trends in Geoinformatics Education
Map collections belong to valuable parts of the cultural heritage each nation. The TEMAP project focuses on development and utilisation modern digitaltechnologies for on-line accessibility map as well their cataloguing protection. article introduces concept an e-learning course that aims at explanation methodologies software tools applied developed in scope project. main focus is modules Georeferencing Cartometric analysis comprise description tool Georeferencer free packages MapAnalyst detectproj.