Pub Date : 2021-01-01DOI: 10.1553/giscience2021_01_s60
Tobias Kugler, L. Wendt
High-resolution digital elevation models of urban areas can support humanitarian organisations in their work; especially the 3D reconstruction of buildings is desirable because it can be used for population estimation and damage analysis after crises and disaster events. In this paper, we test the quality of multi-date DEMs with 15 Pléiades images from Port-au-Prince, Haiti using the automatic stereo pipeline s2p. We focus on triplet combinations with images taken from different dates. This study investigates the metaparameters satellite azimuth and incident angle to understand which recording geometry yields a good result in terms of completeness and accuracy. It is assumed that the closer the multi-date constellation gets to an in-orbit triplet, the better the quality of the DEM.
{"title":"Evaluation of Digital Elevation Models Derived from Multi-Date Satellite Stereo Imagery for Urban Areas","authors":"Tobias Kugler, L. Wendt","doi":"10.1553/giscience2021_01_s60","DOIUrl":"https://doi.org/10.1553/giscience2021_01_s60","url":null,"abstract":"High-resolution digital elevation models of urban areas can support humanitarian organisations in their work; especially the 3D reconstruction of buildings is desirable because it can be used for population estimation and damage analysis after crises and disaster events. In this paper, we test the quality of multi-date DEMs with 15 Pléiades images from Port-au-Prince, Haiti using the automatic stereo pipeline s2p. We focus on triplet combinations with images taken from different dates. This study investigates the metaparameters satellite azimuth and incident angle to understand which recording geometry yields a good result in terms of completeness and accuracy. It is assumed that the closer the multi-date constellation gets to an in-orbit triplet, the better the quality of the DEM.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87388276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_01_s150
Iskar Jasmani Waluyo Moreno, J. G. Hernández, Agustín Bolóm Gómez, Julio Cesar García Sampayo
This project aimed to exploit existing open data and open-source software to allow visualising and finding spatial coincidences between three groups of indicators: 1) agricultural activity, 2) land use and forest cover changes, and 3) spatial distribution patterns of vegetation loss. This paper presents preliminary results of developing an interactive map using R, Leaflet, and QGIS to perform a simple overlay analysis of layers containing better policy and decision-making indicators. The map uses open data available through the Mexican government platforms, and all processing, storage and publication are done using free open-source software tools. The data used in this project was limited to the Marqués de Comillas municipality because of its importance in Mexico’s forest ecosystem. The maps are a work in progress and a continuation of research done for a geomatics graduate program in Centro de Investigación en Ciencias de Información Geoespacial.
该项目旨在利用现有的开放数据和开源软件来可视化和发现三组指标之间的空间一致性:1)农业活动，2)土地利用和森林覆盖变化，以及3)植被损失的空间分布模式。本文介绍了使用R、传单和QGIS开发交互式地图的初步结果，以执行包含更好的政策和决策指标的层的简单叠加分析。该地图使用墨西哥政府平台上的开放数据，所有的处理、存储和发布都是使用免费的开源软件工具完成的。本项目使用的数据仅限于马奎斯-科米亚斯市，因为它在墨西哥森林生态系统中的重要性。这些地图是一项正在进行的工作，是为Investigación en Ciencias de Información Geoespacial中心的一个地理信息研究生项目所做研究的延续。
{"title":"Using Open-Source Data and Software to Analyse Land-Use Changes and Deforestation in Marqués de Comillas, Chiapa, Mexico (Work in Progress)","authors":"Iskar Jasmani Waluyo Moreno, J. G. Hernández, Agustín Bolóm Gómez, Julio Cesar García Sampayo","doi":"10.1553/giscience2021_01_s150","DOIUrl":"https://doi.org/10.1553/giscience2021_01_s150","url":null,"abstract":"This project aimed to exploit existing open data and open-source software to allow visualising and finding spatial coincidences between three groups of indicators: 1) agricultural activity, 2) land use and forest cover changes, and 3) spatial distribution patterns of vegetation loss. This paper presents preliminary results of developing an interactive map using R, Leaflet, and QGIS to perform a simple overlay analysis of layers containing better policy and decision-making indicators. The map uses open data available through the Mexican government platforms, and all processing, storage and publication are done using free open-source software tools. The data used in this project was limited to the Marqués de Comillas municipality because of its importance in Mexico’s forest ecosystem. The maps are a work in progress and a continuation of research done for a geomatics graduate program in Centro de Investigación en Ciencias de Información Geoespacial.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82801747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s65
Alois Simon
Mountain forests provide a wide variety of ecosystem services to society. In light of the trend of temperature increase and related climatic extremes in the Greater Alpine Area, mountain forests are likely to undergo dramatic changes in the coming centuries. Therefore, forest managers face the challenge of adapting forests to support resilience to climate change. To facilitate this process, the forest gap model ForClim, a process-based forest succession model, was applied to generate site-specific information on future forest stand development and species composition. The tree species composition without management activities was predicted up to 2100 assuming a stable climate, and for both moderate and severe climate-change scenarios. Furthermore, three different forest stand development scenarios were implemented. The forest stand investigated in our research shows significant climate-sensitivity. Results demonstrate that deciduous mixed forest stands are necessary to increase resilience and manage forests for climate change. Using active silvicultural measures, such as assisted migration through planting thermophilus species, negative effects of climate change could be reduced. The modelling approach presented here is appropriate for assessing the impacts of climate change and supporting decision making by local forest managers.
{"title":"Modelling Climate–Sensitive Forest Succession to Assess Impacts of Climate Change and Support Decision Making","authors":"Alois Simon","doi":"10.1553/giscience2021_02_s65","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s65","url":null,"abstract":"Mountain forests provide a wide variety of ecosystem services to society. In light of the trend of temperature increase and related climatic extremes in the Greater Alpine Area, mountain forests are likely to undergo dramatic changes in the coming centuries. Therefore, forest managers face the challenge of adapting forests to support resilience to climate change. To facilitate this process, the forest gap model ForClim, a process-based forest succession model, was applied to generate site-specific information on future forest stand development and species composition. The tree species composition without management activities was predicted up to 2100 assuming a stable climate, and for both moderate and severe climate-change scenarios. Furthermore, three different forest stand development scenarios were implemented. The forest stand investigated in our research shows significant climate-sensitivity. Results demonstrate that deciduous mixed forest stands are necessary to increase resilience and manage forests for climate change. Using active silvicultural measures, such as assisted migration through planting thermophilus species, negative effects of climate change could be reduced. The modelling approach presented here is appropriate for assessing the impacts of climate change and supporting decision making by local forest managers.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85682091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s136
Oliver Hennhöfer, Julian Bruns, P. Ullrich, A. Heiß, Galibjon M. Sharipov, D. Paraforos
{"title":"Multidimensional Exploratory Spatial Data Analysis","authors":"Oliver Hennhöfer, Julian Bruns, P. Ullrich, A. Heiß, Galibjon M. Sharipov, D. Paraforos","doi":"10.1553/giscience2021_02_s136","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s136","url":null,"abstract":"","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"125 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78462016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s174
Christoph Traun, G. Wallentin, M. Schreyer
In this research, we discuss five design parameters found in cognitive studies related to animated choropleth maps and compare existing studies accordingly. With reference to these parameters, we present the design of an experiment to assess how different forms of value generalization in choropleth map animation affect the perception of overall trends and local deviations therefrom. The mixed study design of the experiment allowed a direct comparison of within-subject and between-subject designs. Using repeated subsampling of our empirical data, the greater statistical power of the within-subject design was proven, even when correcting for differences in the number of data elements analysed.
{"title":"Design of an Experiment to Evaluate Modes of Value Generalization in Animated Choropleth Maps","authors":"Christoph Traun, G. Wallentin, M. Schreyer","doi":"10.1553/giscience2021_02_s174","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s174","url":null,"abstract":"In this research, we discuss five design parameters found in cognitive studies related to animated choropleth maps and compare existing studies accordingly. With reference to these parameters, we present the design of an experiment to assess how different forms of value generalization in choropleth map animation affect the perception of overall trends and local deviations therefrom. The mixed study design of the experiment allowed a direct comparison of within-subject and between-subject designs. Using repeated subsampling of our empirical data, the greater statistical power of the within-subject design was proven, even when correcting for differences in the number of data elements analysed.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90660533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_01_s130
M. Mõttus, M. Dees, H. Astola, S. Dałek, Eelis Halme, T. Häme, Monika Krzyżanowska, A. Mäkelä, G. Marin, F. Minunno, Gero Pawlowski, Juho Penttilä, J. Rasinmäki
Europe has acknowledged the need to develop a very high precision digital model of the Earth, a Digital Twin Earth, running on cloud infrastructure to bring data and end-users closer together. We present results of an investigation of a proposed submodel of the digital twin, simulating the worlds’ forests. We focus on the architecture of the system and the key user needs on data content and access. The results are based on a user survey showing that the forest-related communities in Europe require information on contrasting forest variables and processes, with common interest in the status and forecast of forest carbon stock. We discuss the required spatial resolution, accuracies, and modelling tools required to match the needs of the different communities in data availability and simulation of the forest ecosystem. This, together with the knowledge on existing and projected future capabilities, allows us to specify a data architecture to implement the proposed system regionally, with the outlook to expand to continental and global scales. Ultimately, a system simulating the behaviour of forests, a digital twin, would connect the bottom-up and top-down approaches of computing the forest carbon balance: from tree-based accounting of forest growth to atmospheric measurements, respectively.
{"title":"A Methodology for Implementing a Digital Twin of the Earth’s Forests to Match the Requirements of Different User Groups","authors":"M. Mõttus, M. Dees, H. Astola, S. Dałek, Eelis Halme, T. Häme, Monika Krzyżanowska, A. Mäkelä, G. Marin, F. Minunno, Gero Pawlowski, Juho Penttilä, J. Rasinmäki","doi":"10.1553/giscience2021_01_s130","DOIUrl":"https://doi.org/10.1553/giscience2021_01_s130","url":null,"abstract":"Europe has acknowledged the need to develop a very high precision digital model of the Earth, a Digital Twin Earth, running on cloud infrastructure to bring data and end-users closer together. We present results of an investigation of a proposed submodel of the digital twin, simulating the worlds’ forests. We focus on the architecture of the system and the key user needs on data content and access. The results are based on a user survey showing that the forest-related communities in Europe require information on contrasting forest variables and processes, with common interest in the status and forecast of forest carbon stock. We discuss the required spatial resolution, accuracies, and modelling tools required to match the needs of the different communities in data availability and simulation of the forest ecosystem. This, together with the knowledge on existing and projected future capabilities, allows us to specify a data architecture to implement the proposed system regionally, with the outlook to expand to continental and global scales. Ultimately, a system simulating the behaviour of forests, a digital twin, would connect the bottom-up and top-down approaches of computing the forest carbon balance: from tree-based accounting of forest growth to atmospheric measurements, respectively.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78869227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s3
J. Buchner, P. Jeremias, Nikola Kobzare, Lelia König, Sebastian Oberreiter, Stefan Reiter, Bernd Resch
In this paper, we describe an interactive learning environment for geoinformatics enriched by Augmented Reality (AR) that was designed by researchers and practitioners using a design-based research approach. In total, four AR modules were developed to engage learners physically, cognitively and emotionally in the learning process. AR is thus used not merely as a visualization technology, but also to initiate and scaffold learning activities. To address the known challenges of learning with AR, we designed our learning environment to be used by teams of students. This can counteract the problem of cognitive overload, or frustration due to technical problems. We examined our technological and pedagogical framework in an evaluation with 12 learners. The results show that our design did not lead to cognitive overload; technological aspects, such as usability, were also evaluated positively. However, we also detected possible improvements to our design, such as using AR glasses to free the hands for task completion. Overall, it was shown that AR is a good way to expand traditional learning opportunities with digital ones and to enable holistic learning
{"title":"An Augmented Reality Learning Environment for Informal Geoinformatics Education","authors":"J. Buchner, P. Jeremias, Nikola Kobzare, Lelia König, Sebastian Oberreiter, Stefan Reiter, Bernd Resch","doi":"10.1553/giscience2021_02_s3","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s3","url":null,"abstract":"In this paper, we describe an interactive learning environment for geoinformatics enriched by Augmented Reality (AR) that was designed by researchers and practitioners using a design-based research approach. In total, four AR modules were developed to engage learners physically, cognitively and emotionally in the learning process. AR is thus used not merely as a visualization technology, but also to initiate and scaffold learning activities. To address the known challenges of learning with AR, we designed our learning environment to be used by teams of students. This can counteract the problem of cognitive overload, or frustration due to technical problems. We examined our technological and pedagogical framework in an evaluation with 12 learners. The results show that our design did not lead to cognitive overload; technological aspects, such as usability, were also evaluated positively. However, we also detected possible improvements to our design, such as using AR glasses to free the hands for task completion. Overall, it was shown that AR is a good way to expand traditional learning opportunities with digital ones and to enable holistic learning","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78549908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s108
V. Ferrara, A. Wästfelt
The biocultural heritage of historical landscapes is an expression of intertwined ecological and socio-cultural dynamics at different temporal and spatial scales. Such a legacy is what confers high nature value on agricultural systems worldwide. Today there is an urgent need to develop approaches that may allow a more integrated study of biocultural heritage in order to better direct future endeavours for the sustainable management on such agricultural systems. Here, a methodological approach to unpack space-time complexity in the land-use dynamics of historic and current-day agrosystems is presented, based on the use of contextual and spatial-relational segmentation techniques within the research framework of historical ecology. With reference to work done in a case study area in Sicily, the authors first extract geographic contextual configurations and develop a spatial-relational ontology for their semantic interpretation, before using these spatial objects as temporal proxies to disentangle the spatial and temporal dynamics of land use. The result is a cross-disciplinary approach in which perspectives from historical ecology can be used to achieve a deeper understanding of evidence extracted from remotely sensed images. At the same time, advanced spatial analysis techniques may provide a further interpretative tool for scientific inquiry into biocultural heritage.
{"title":"Unpacking Layers of Space –Time Complexity in Land–Use Dynamics. A Case Study from the Olive Agrosystems of Sicily (Italy)","authors":"V. Ferrara, A. Wästfelt","doi":"10.1553/giscience2021_02_s108","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s108","url":null,"abstract":"The biocultural heritage of historical landscapes is an expression of intertwined ecological and socio-cultural dynamics at different temporal and spatial scales. Such a legacy is what confers high nature value on agricultural systems worldwide. Today there is an urgent need to develop approaches that may allow a more integrated study of biocultural heritage in order to better direct future endeavours for the sustainable management on such agricultural systems. Here, a methodological approach to unpack space-time complexity in the land-use dynamics of historic and current-day agrosystems is presented, based on the use of contextual and spatial-relational segmentation techniques within the research framework of historical ecology. With reference to work done in a case study area in Sicily, the authors first extract geographic contextual configurations and develop a spatial-relational ontology for their semantic interpretation, before using these spatial objects as temporal proxies to disentangle the spatial and temporal dynamics of land use. The result is a cross-disciplinary approach in which perspectives from historical ecology can be used to achieve a deeper understanding of evidence extracted from remotely sensed images. At the same time, advanced spatial analysis techniques may provide a further interpretative tool for scientific inquiry into biocultural heritage.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82387497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s54
L. Fuchs, D. Kanwischer, Christian Dorsch
This article addresses the current challenges for geographical educational science brought about by algorithmic cultures. It argues from different theoretical perspectives. First, we discuss sociological, cultural and geographical perspectives on algorithmic cultures and link them to selected approaches of media education in general and geographical media education in particular. We conclude from the discussion that Spatial Citizenship Education is especially suitable to address the challenges. This leads to the question of what aspects of Spatial Citizenship Education need to be supplemented to address algorithmic cultures. We therefore examined the curriculum of Spatial Citizenship Education. The analysis demonstrated that the approach is a sound basis for coping with the developments seen in the context of algorithmic cultures. Nevertheless, algorithmic cultures are accompanied by some changes in social and geographical structures that have not yet been captured by the approach. For example, there is no consideration of geomedia as algorithmic, semiautonomous systems. Further implications also emerge. In this context, the investigation into the practicability and relevance of algorithmic cultures for the practical learning process is of particular interest.
{"title":"Algorithmic Cultures: A Missing Link of Spatial Citizenship Education","authors":"L. Fuchs, D. Kanwischer, Christian Dorsch","doi":"10.1553/giscience2021_02_s54","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s54","url":null,"abstract":"This article addresses the current challenges for geographical educational science brought about by algorithmic cultures. It argues from different theoretical perspectives. First, we discuss sociological, cultural and geographical perspectives on algorithmic cultures and link them to selected approaches of media education in general and geographical media education in particular. We conclude from the discussion that Spatial Citizenship Education is especially suitable to address the challenges. This leads to the question of what aspects of Spatial Citizenship Education need to be supplemented to address algorithmic cultures. We therefore examined the curriculum of Spatial Citizenship Education. The analysis demonstrated that the approach is a sound basis for coping with the developments seen in the context of algorithmic cultures. Nevertheless, algorithmic cultures are accompanied by some changes in social and geographical structures that have not yet been captured by the approach. For example, there is no consideration of geomedia as algorithmic, semiautonomous systems. Further implications also emerge. In this context, the investigation into the practicability and relevance of algorithmic cultures for the practical learning process is of particular interest.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"187 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80666504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1553/giscience2021_02_s94
Victoria Chmarycz, K. Forsythe
The scale and danger of wildfires are a growing concern in Western Canada. The Northwest Fire Centre is one of six designated wildfire management districts in the Canadian Province of British Columbia. It covers 25 million hectares, or a quarter of the area of the province. The centre sees the greatest area burned from wildfire spread in the province, although it experiences the lowest number of active wildfires annually. This study examined two Sentinel2 images capturing the ‘before’ and ‘after’ of a major wildfire that took place in the Lutz Creek area within the Northwest Fire Centre in 2018. Higher-risk wildfire spread areas were identified by combining Normalized Difference Vegetation Index, Normalized Difference Water Index and slope gradient variables. When slope was included, the Moderately High and High burn vulnerability categories increased to ~54% of the area analysed, compared to ~33% when it was not included. Together, all three variables provide the basis for a more accurate assessment of forest burn spread and vulnerability.
{"title":"Examining Wildfire Spread Variables for Assessing Forest Burn Vulnerability","authors":"Victoria Chmarycz, K. Forsythe","doi":"10.1553/giscience2021_02_s94","DOIUrl":"https://doi.org/10.1553/giscience2021_02_s94","url":null,"abstract":"The scale and danger of wildfires are a growing concern in Western Canada. The Northwest Fire Centre is one of six designated wildfire management districts in the Canadian Province of British Columbia. It covers 25 million hectares, or a quarter of the area of the province. The centre sees the greatest area burned from wildfire spread in the province, although it experiences the lowest number of active wildfires annually. This study examined two Sentinel2 images capturing the ‘before’ and ‘after’ of a major wildfire that took place in the Lutz Creek area within the Northwest Fire Centre in 2018. Higher-risk wildfire spread areas were identified by combining Normalized Difference Vegetation Index, Normalized Difference Water Index and slope gradient variables. When slope was included, the Moderately High and High burn vulnerability categories increased to ~54% of the area analysed, compared to ~33% when it was not included. Together, all three variables provide the basis for a more accurate assessment of forest burn spread and vulnerability.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87591133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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