Sökning: "Digital terrain model DTM"

Visar resultat 11 - 15 av 22 uppsatser innehållade orden Digital terrain model DTM.

1. 11. Mätosäkerhet vid digital terrängmodellering med handhållen laserskanner : Undersökning av den handhållna laserskannern ZEB-REVO

   Kandidat-uppsats, Högskolan i Gävle/Samhällsbyggnad, GIS

   Författare :Amanda Gustafsson; Olov Wängborg; [2018]
   Nyckelord :Airborne laser scanning ALS ; Digital terrain model DTM ; Handheld laser scanning HLS ; Simultaneuos localization and mapping SLAM ; ZEB-REVO; Digital terrängmodell DTM ; Flygburen laserskanning FLS ; Handhållen laserskanning HLS ; Simultaneuos localization and mapping SLAM ; ZEB-REVO;

   Sammanfattning : En digital terrängmodell (DTM) är en representation av enbart själva markytan. Det finns flera metoder för att framställa DTM:er, där laserskanning har blivit en alltmer vanlig metod. Inom laserskanning är flygburen laserskanning (FLS) en flitigt använd metod, då metoden har fördelen av att kunna täcka stora områden på kort tid. LÄS MER

3. 12. Inundation scenarios in a changing climate : assessing potential impacts of sea-level rise on the coast of South-East England

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Adela Nistora; [2018]
   Nyckelord :Geography; Geographical Information Systems; GIS; Climate Change; Climate Change Impacts; Sea-Level Rise; Coastal Inundation; LiDAR; South-East England; Earth and Environmental Sciences;

   Sammanfattning : The aim of this study was to explore sea-level rise (SLR) exposure in South-East England by conducting a broad analysis of some of the possible impacts of inundation in the region under different SLR scenarios in a warming climate. The potential effects of coastal inundation were mapped and quantified by applying a modified bathtub modelling approach in GIS to a low-elevation coastal Digital Terrain Model (DTM) derived from up-to-date, high-resolution, high-accuracy LiDAR data. LÄS MER

4. 13. Mapping drainage of the rootless shield volcano at Dimmuborgir, northern Iceland

   Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

   Författare :Jacob Gustafsson; [2016]
   Nyckelord :Dimmuborgir; rootless shield; drainage; striations; dip angle; dip direction; Digital Terrain Model; lava channels; lava pillars; collapse structures;

   Sammanfattning : Dimmuborgir is thought to be a former rootless shield volcano, which was fed with lava from a nearby crater row, 2170 ± 38 calendar years before present. In this study, the orientation of striations on the sides of lava channels, collapse structures and lava pillars were measured to find out how the enigmatic ~2 km by 2 km volcanic structure at Dimmuborgir was drained. LÄS MER

5. 14. Exploring the use of 3D GIS as an analytical tool in archaeological excavation practice

   Master-uppsats, Lunds universitet/Arkeologi

   Författare :Sjoerd Van Riel; [2016]
   Nyckelord :archaeology; digital archaeology; 3D models; 3D 4D GIS; photogrammetry; LIDAR; laser scanning; excavation methodology; excavation documentation; archaeological drawing methods; reflexivity; landscape archaeology; History and Archaeology;

   Sammanfattning : Several digital technologies are now available to record and document archaeological excavations. A large number of studies have been published concerning the use of laser scanning, image based 3D modelling and GIS. LÄS MER

7. 15. Extraction of DTM from Satellite Images Using Neural Networks

   Master-uppsats, Linköpings universitet/Datorseende

   Författare :Gustav Tapper; [2016]
   Nyckelord :DTM; DSM; classification; neural networks; satellite images;

   Sammanfattning : This thesis presents a way to generate a Digital Terrain Model (dtm) from a Digital Surface Model (dsm) and multi spectral images (including the Near Infrared (nir) color band). An Artificial Neural Network (ann) is used to pre-classify the dsm and multi spectral images. This in turn is used to filter the dsm to a dtm. LÄS MER