A pyramid approach to lossless data compression of grid-based digital elevation models

Scarmana, Gabriel and McDougall, Kevin (2014) A pyramid approach to lossless data compression of grid-based digital elevation models. In: IEEE International Geoscience and Remote Sensing Symposium 2014 (IGARSS 2014): Energy and our Changing Planet, 13-18 July 2014, Quebec City, Canada.

Abstract

A DEM can be represented like an image, except that it contains a single channel of information of various shades of grey and can be compressed in a lossy or lossless manner by way of existing image compression protocols. Compression has the effect of reducing memory requirements and speed of transmission over digital links, while maintaining the integrity of data as required.
In this context, this paper investigates the use of an alternative image pyramid approach for DEM lossless compression referred to as Pyramid Lossless Differential Coding (PLDC). The effect of the PLDC on floating-point elevation values for 16-bit DEMs of dissimilar terrain characteristics is investigated here. Tests demonstrate that the compression ratios and compression speed achieved with this approach can be comparable to, or better than, lossless proprietary JPEG variants and other image formats (i.e. PNG, TIFF).


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 IEEE. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 03 Sep 2014 00:52
Last Modified: 14 Jun 2017 03:53
Uncontrolled Keywords: image processing; DEM compression; terrain modelling; image pyramid
Fields of Research : 04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040699 Physical Geography and Environmental Geoscience not elsewhere classified
04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040607 Surface Processes
09 Engineering > 0909 Geomatic Engineering > 090903 Geospatial Information Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970104 Expanding Knowledge in the Earth Sciences
Identification Number or DOI: 10.1109/IGARSS.2014.6946981
URI: http://eprints.usq.edu.au/id/eprint/25600

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