A master thesis from Aalborg University
Webgis based crowdsourcing, aiming at producing inland lake charts in Denmark
Author(s)
Term
4. term
Publication year
2012
Submitted on
2012-02-16
Pages
104 pages
Abstract
One kind of spatial data is still not in the national databases, and this is bathymetric data from lakes. This paper describes the data standards associated, the methods of surveying including historic. It describes the history of Danish lake mapping, and produces an inventory over surveyed Danish lakes. It discusses how to choose standards for lake mapping. The paper suggests that crowd sourcing might be applied to collect data, and discuss the various aspects in crowd sourcing VGI. Vertical accuracy in consumer echo sounders is tested. Parsing data from echo sounders are demonstrated. Finally a Web-Gis is constructing visualizing Danish lake maps and VGI data, presenting a upload functionality and addressing issues with metadata necessary for further post processing of data.
Documents
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