Essays about: "Landscape Reconstruction Algorithm"

Found 3 essays containing the words Landscape Reconstruction Algorithm.

  1. 1. Reconstruction of Fire Spread with a Markov Random Field Mixture Model

    University essay from Lunds universitet/Matematisk statistik

    Author : Marcus Gehrmann; [2023]
    Keywords : Forest fire; fire scars; spatial statistics; Markov random field; EM-algorithm; pseudo-likelihood; Mathematics and Statistics;

    Abstract : This thesis revolves around reconstructing fire sizes for historical fires in Jämtgaveln, Sweden based on data of fire scars in trees. We propose a Hidden Markov Model (HMM), where the domain is divided into quadratic grid cells of 250 $\times$ 250 m and with these grid cells we associate a binary Markov random field taking values 0 or 1 corresponding to no fire and fire respectively. READ MORE

  3. 2. Using Pollen to Reconstruct Past Vegetation in a Landscape : Comparing Theoretical and Empirical Methods on a Single Pollen Record in Hemavan, Sweden

    University essay from Umeå universitet/Institutionen för idé- och samhällsstudier

    Author : Johanna Kantak; [2022]
    Keywords : Vegetation reconstruction; LRA; palynology; fall speed; GIS;

    Abstract : Pollenanalyser har länge gjorts för att få en uppfattning om förflutna vegetationer. Men att återskapa olika miljöer med hjälp av pollen är svårt på grund av en rad olika faktorer. READ MORE

  4. 3. Land cover changes in Southern Sweden from the mid-Holocene to present day: insights for ecosystem service assessments

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Robert O'Dwyer; [2019]
    Keywords : Geography; Geographical Information Systems; GIS; Physical Geography; Götaland; Landscape Reconstruction Algorithm; Fossil Pollen; Ecosystem Services; Earth and Environmental Sciences;

    Abstract : Climate change and human impact play a huge role in the sustainability and development of ecosystems and the services they offer to societies over temporal and spatial scales. Fossil pollen-based estimates provide unique information on past land cover change, but to date there are not many methods able to create spatially continuous maps and have a fine scale of land cover changes inferred from pollen information. READ MORE