Search for dissertations about: "elevation models"

Showing result 1 - 5 of 98 swedish dissertations containing the words elevation models.

  2. 1. Global Pose Estimation from Aerial Images : Registration with Elevation Models

    Author : Bertil Grelsson; Michael Felsberg; Per-Erik Forssén; Kalle Åström; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Over the last decade, the use of unmanned aerial vehicles (UAVs) has increased drastically. Originally, the use of these aircraft was mainly military, but today many civil applications have emerged. READ MORE

  4. 2. Geographic Indexing and Data Management for 3D-Visualisation

    Author : Patrik Ottoson; KTH; []
    Keywords : geographic visualisation; virtual reality; geographic indexing; spatial indexing; ellipsoidal quadtrees; global geographic databases; quadtrees; data fusion; data compression; wavelets; terrain models; elevation models;

    Abstract : .... READ MORE

  5. 3. Spatially Distributed Hydrological Modelling : Wetness Derived from Digital Elevation Models to Estimate Peatland Carbon

    Author : Abdulghani Hasan; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; modelling hydrology; Digital elevation models; LiDAR data; topographic wetness index; GIS; permafrost; Stordalen; peatland;

    Abstract : To study the hydrology of peatlands and explore wetness distribution is difficultmainly due to the complexity of the surface of peatlands, and also due to the presence of permafrost underlain peatlands in the arctic regions. I have chosen the area called Stordalen mire in the arctic region in northern Sweden for my study. READ MORE

  6. 4. Low-angle estimation : Models, methods and bounds

    Author : Katarina Boman; Peter Stoica; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal Processing; Signalbehandling;

    Abstract : In this work we study the performance of elevation estimators and lower bounds on the estimation error variance for a low angle target in a smooth sea scenario using an array antenna. The article is structured around some key assumptions on multipath knowledge, signal parameterization and noise covariance, giving the reader a framework in which Maximum Likelihood estimators exploiting different á priori information can be found. READ MORE

  7. 5. Precipitation phase determination in cold region conceptual models - analysis and method development

    Author : James Feiccabrino; Avdelningen för Teknisk vattenresurslära; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Snow Models; Precipitation Phase Uncertainty; ; Snow; Conceptual Model; Cold Regions;

    Abstract : Precipitation phase uncertainty is a known source of error in conceptual models used for many hydrological, climatological, and environmental applications. These conceptual models often use the simple approach of calibrating an air temperature threshold (TRS) over a large area irrespective of physiographic characteristics such as distance to the ocean and topographic relief. READ MORE