The second part of GoGeo’s review of GISRUK 2012 covers Thursday. If you want to find out what happened on Wednesday, please read this post.
Thusrday saw a full programme of talks split between two parallel sessions. I chose to go to the Landscape Visibility and Visualisation strand.
- Steve Carver (University of Leeds) started proceedings with No High Ground: visualising Scotland’s renewable landscape using rapid viewshed assessment tools. This talk brought together new modeling software that allowed for multiple viewsheds to be analysied very quickly, with a practical and topical subject. The SNP want Scotland to be self-sufficient with renewable energy by 2020. An ambitious target. In 2009, 42% of Scotlands “views” were unaffected by human developments, this had declined to 28% by 2011. Wind farms are threatening the “wildness” of Scotland and this may have implications on tourism. Interestingly, the SNP also wants to double the income from tourism by 2020. So how can you achieve both? By siting new wind farms in areas that do not further impact on the remaining wild areas. This requires fast and efficient analysis of viewsheds which is what Steve and his team presented.
- Sam Meek (University of Nottingham) was next up presenting on The influence of digital surface models choice on the visibility-based mobile geospatial application. Sam’s research focused onan application called Zapp. Sam is looking at how to efficiently and accuretly run visibility models on mobile devices in the field and how the results are influenced by the surface model. In each case, all processing is done on the device. Resampling detailed DTM’s is obviously going to make processing less intensive, however this often leads to issues such as smoothing of features. Other general issues with visibility models are stepping, where edges form in the DTM and interupt the line of sight and an over estimation of vegetation. This research should help make navigation apps on mobiles that use visual landmarks to guide the user, more accurate and usable.
- Possibly the strangest and most intruging paper title at GISRUK 2012 came from Neil Sang (Sweedish University of Argicultural Science) with New Horizons for the Standford Bunny – A novel method for view analysis. The “bunny” reference was a bit of a red herring but the research did look at horizon based view analysis. The essence was to identify horizons in a landscape to improve the speed of viewshed analysis as the horizons often persisted even when the local position changed.
- The final paper of the session took a different direction with David Miller of The James Hutton Institute looking at Testing the publics preferences for future. This linked public policy with public consultations through the use of virtual reality environments. The research investigated whether familiarity with the location altered the opinion of planned changes to the landscapes. Findings showed agreement in developing amenity woodland adjacent to a village, and environmental protection, but differences arose in relation to proposals for medium-sized windfarms (note – medium-sized wind farms are defined as those that would perhaps be constructed to supply power to a farm and not commercial windfarms).
After coffee I chose to go to the Qualitative GIS session as it provided an interesting mix f papers that explored social media and enabling”the crowd”.
- First up was Amy Fowler (Lancaster University) who asked How reliable is citized-derived scientific data? This research looked at the prevelance of aircraft contrails using data derived through the Open Air Laboratories (OPAL) Climate Survey. Given the dynamic nature of the atmosphere, it is impossible to validate user contributed data. Amy hopes to script an automated confidence calculator to analyse nearly 9,000 observations, but initial analysis suggests that observations that have accompanying photographs tend to be more reliable.
- Iain Dillingham (City University) looked at Characterising Locality Descriptors in crowd-sourced information. This specifically focused on humanitarian organisations. Using the wealth of data available from the 2010 Haiti earthquake they investigated the uncertainty of location from social media. They looked at georeferencing locality descriptors in MaNIS (Mammal Network Information System). The conclusion was that while there were similarities in the datasets, the crowd-sourced data presented significant challenges with respect to vagueness, ambiguity and precision.
- The next presentation changed the focus somewhat, Scott Orford (Cardiff University) presented his work on Mapping interview transcript records: technical, theoretical and cartographical challenges. This research formed part of the WISERD project and aimed to geo-tag interview transcripts . Geo-tagging was done using UNLOCK but there were several issues with getting useful results out, or reducing the noise in the data. Interview scripts were transcribed in England and complicated Welsh placename spellings often got transcribed incorrectly. In addition, phrases such as “Erm” were quite frequent and got parsed which then had to be removed as they did not actually relate to a place. Interesting patterns did emerge about what areas appeared to be of interest to different people in different regions of Wales, however care had to be taken in preparing the dataset and parsing it.
- Chris Parker (Loughborough University) looked at Using VGI in design for online usability: the case of access information. Chris used a number of volunteers to collect data on accessibility to public transport. The volunteers might be considered an expert group as they were all wheel-chair users. Comparison was made between an official map and one that used the VGI data. It was found that the public perception of quality increased when VGI data was used making it an attractive and useful option for improving the confidence of online information. However, it would be interesting to look at this issue with a more mixed crowd of volunteer, rather than just the expert user group who seemed to have been commission (but not paid) to collect specific information. I am also not too sure where the term Usability from the title fits. Trusting the source of online data may increase it use but this is not usability which refers more to the ability of users to engage with and perform tasks on an interface.
There was a good demonstration from ESRI UK of their ArcGIS.com service. This allows users to upload their own data, theme it and display it against one of a number of background maps. The service then allows you to publish the map and restrict the access to the map by creating groups. Users can also embed the map into a website by copying some code that is automatically created for you. All good stuff, if you want to find out more about this then have a look at the ArcGIS.com website.
Most of Friday was given over to celebrating the career of Stan Openshaw. I didn’t work with Stan but it is clear from the presentations that he made a significant contribution to the developing field of GIS and spatial analysis and had a huge effect on the development of many of the researchers that regularly attend GISRUK. If you want to find out more about Stan’s career, have a look at the Stan Openshaw Collection website.
Friday’s keynote was given by Tyler Mitchel who was representing the OSGeo community. Tyler was a key force in the development of the OSGeo group and has championed the use of open software in gis. Tyler’s presentation focused on interoprability and standards and how they combine to allow you to create a software stack that can easily meet you GIS needs. I will try to get a copy of the slides of Tyler’s presentation and link to them from here.