Ying, Fangli and Mooney, Peter and Corcoran, Padraig and Winstanley, Adam C. (2011) Selective progressive transmission of vector data. In: 11th International Conference on GeoComputation, 20-22 July 2011, UCL, London.

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Abstract

Delivering raw geospatial data to mobile devices is an interesting and challenging computational and user-interface problem. Geospatial data can be rendered in real-time on the mobile device using appropriate visualisation software running on the mobile device operating system. Currently the majority of approaches in delivering geospatial data to mobile devices provide pre-rendered maps (tiles, images). While tile-based approaches have evolved into a defacto standard we feel there are a number of advantages in delivering geospatial data in raw vector formats (XML, GML, Shapefile, etc) to mobile devices including: User personalisation: User can choose which geographical features are displayed, change map themes, set visualisation preferences, etc. Timeliness: The user is always provided with the most up-to-date and recent versions of the spatial data. A number of contraints imposed by the mobile device environment provide major challenges including: screen resolution, available network bandwidth, and usability issues arising from providing map visualisation on small screens (Raper et al.; 2007). In this extended abstract we describe an implementation of a selective progressive transmission scheme for vector data. We use OpenStreetMap (OSM) as the case-study vector dataset. OSM data has a number of attractive features which make it a useful case study, these including: in many areas, OSM data often changes very quickly; OSM attempts to map a very wide range of geographical features; and is freely and openly available. In our implementation a user requests an area of OSM data they wish to view on their mobile device. This OSM data is downloaded immediately on the server where it is generalised. This OSM data package is then progressively transmitted beginning with a low level of detail version of the dataset. In an iterative process additional spatial detail is transmitted to the mobile device until the full resolution dataset is delivered. Our paper provides a brief overview of the implementation of our progressive transmission scheme. We describe an example of selective progressive transmission for a sample OSM dataset.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Fangli Ying is funded by Irish Universities Association and China Scholarship Council. Research presented in this paper was funded by a Strategic Research Cluster grant (07/SRC/I1168) by Science Foundation Ireland under the National Development Plan. Peter Mooney is funded by the Irish Environmental Protection Agency STRIVE programme (grant 2008-FSDM- 14-S4).
Keywords:	Selective progressive transmission; vector data; geospatial data; mobile devices;
Academic Unit:	Faculty of Science and Engineering > Computer Science
Item ID:	4977
Depositing User:	Dr. Adam Winstanley
Date Deposited:	21 May 2014 15:55
Refereed:	Yes
Funders:	Irish Universities Association and China Scholarship Council, Science Foundation Ireland, Irish Environmental Protection Agency STRIVE programme
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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