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Images, UC QuakeStudies

A photograph of a large All Right? banner on a temporary hoarding around the McKenzie and Willis building in the central city. The photograph was used as a cover photo on the All Right? Facebook page. All Right? posted the photograph on their Facebook page on 21 April 2014 at 10:18pm.

Images, UC QuakeStudies

An image used as a cover photo on the All Right? Facebook page. The image depicts a family of 'All Righties' walking their dog. The image was used in different resources to promote The Walking Festival. All Right? posted the image on their Facebook page on 20 October 2014 at 1:35pm.

Images, UC QuakeStudies

A photograph of a Canterbury Rollercoaster fridge magnet, which was used as a cover photo on the All Right? Facebook page. The Canterbury Rollercoaster was designed to raise awareness around emotional literacy in Canterbury. All Right? posted the photograph on their Facebook page on 2 May 2014 at 8:53am.

Images, UC QuakeStudies

The dome of the Isaac Theatre Royal covered in sheeting and suspended in the backstage area. In the foreground, a small digger sits on the bed of a truck, and a crane is visible to the left. The photographer comments, "This is the 'dome' of the Isaac Theatre Royal's heritage stage. The front section of the theatre has stayed and so has the back, but the middle has been completely demolished. The best way to hide a secret is in plain sight. Could this really be an ancient UFO stored secretly in the old theatre for decades and now exposed by the earthquake? Is the waiting crane and transporter ready to whip it away to another secret location in the dead of night?".

Images, UC QuakeStudies

An image used as a cover photo on the All Right? Facebook page. The image reads, "Into it or over it? Live Brighter." 'Live Brighter' was an All Right? campaign to encourage happier, healthier behaviours and lifestyles that began in 2016. All Right? used the image as a Facebook cover photo on 11 March 2016 at 10:51am and 30 March 2016 at 1:06pm.

Images, UC QuakeStudies

A scanned copy of the cover page of an issue of Canta published on Thursday 14 August 1952. The cover features an article on economic problems in Great Britain.

Research papers, University of Canterbury Library

Land cover change information in urban areas supports decision makers in dealing with public policy planning and resource management. Remote sensing has been demonstrated as an efficient and accurate way to monitor land cover change over large extents. The Canterbury Earthquake Sequence (CES) caused massive damage in Christchurch, New Zealand and resulted in significant land cover change over a short time period. This study combined two types of remote sensing data, aerial imagery (RGB) and LiDAR, as the basis for quantifying land cover change in Christchurch between 2011 – 2015, a period corresponding to the five years immediately following the 22 February 2011 earthquake, which was part of the CES. An object based image analysis (OBIA) approach was adopted to classify the aerial imagery and LiDAR data into seven land cover types (bare land, building, grass, shadow, tree and water). The OBIA approach consisted of two steps, image segmentation and object classification. For the first step, this study used multi-level segmentation to better segment objects. For the second step, the random forest (RF) classifier was used to assign a land cover type to each object defined by the segmentation. Overall classification accuracies for 2011 and 2015 were 94.0% and 94.32%, respectively. Based on the classification result, land cover changes between 2011 and 2015 were then analysed. Significant increases were found in road and tree cover, while the land cover types that decreased were bare land, grass, roof, water. To better understand the reasons for those changes, land cover transitions were calculated. Canopy growth, seasonal differences and forest plantation establishment were the main reasons for tree cover increase. Redevelopment after the earthquake was the main reason for road area growth. By comparing the spatial distribution of these transitions, this study also identified Halswell and Wigram as the fastest developing suburbs in Christchurch. These results provided quantitative information for the effects of CES, with respect to land cover change. They allow for a better understanding for the current land cover status of Christchurch. Among those land cover changes, the significant increase in tree cover aroused particularly interest as urban forests benefit citizens via ecosystem services, including health, social, economic, and environmental benefits. Therefore, this study firstly calculated the percentages of tree cover in Christchurch’s fifteen wards in order to provide a general idea of tree cover change in the city extent. Following this, an automatic individual tree detection and crown delineation (ITCD) was undertaken to determine the feasibility of automated tree counting. The accuracies of the proposed approach ranged between 56.47% and 92.11% in thirty different sample plots, with an overall accuracy of 75.60%. Such varied accuracies were later found to be caused by the fixed tree detection window size and misclassifications from the land cover classification that affected the boundary of the CHM. Due to the large variability in accuracy, tree counting was not undertaken city-wide for both time periods. However, directions for further study for ITCD in Christchurch could be exploring ITCD approaches with variable window size or optimizing the classification approach to focus more on producing highly accurate CHMs.

Images, UC QuakeStudies

A cropped image depicting the cover of a UCSA ring-bound notebook. The cover image is a photograph of the Students' Union Building (later known as the UCSA) taken from University Drive.