Pub Date : 2021-04-29DOI: 10.1080/19475683.2021.1921846
Jirí Hladík, Dajana Snopková, Marek Lichter, L. Herman, M. Konečný
ABSTRACT This paper analyzes and discusses the potential and limits of using Facebook data to analyse spatial-temporal urban rhythms and city centrality through the availability of services and retail. During September 2020, we harvested Facebook Places data using Graph API for our pilot area consisting in the city of Brno. Specifically, we focused on the spatial distribution of ‘Food & Beverage’, ‘Shopping & Retail’ and ‘Medical & Health’ categories, and their associated opening hours. The paper provides a detailed description of data collection and post-processing among possible analysis methods and visualizations presented in the context of our case study. The study focuses on inter-urban structures and urban rhythms through the analysis of opening hours of retail and services. We also discuss the benefits and potential problems associated with the use of these data.
{"title":"Spatial-temporal analysis of retail and services using Facebook Places data: a case study in Brno, Czech Republic","authors":"Jirí Hladík, Dajana Snopková, Marek Lichter, L. Herman, M. Konečný","doi":"10.1080/19475683.2021.1921846","DOIUrl":"https://doi.org/10.1080/19475683.2021.1921846","url":null,"abstract":"ABSTRACT This paper analyzes and discusses the potential and limits of using Facebook data to analyse spatial-temporal urban rhythms and city centrality through the availability of services and retail. During September 2020, we harvested Facebook Places data using Graph API for our pilot area consisting in the city of Brno. Specifically, we focused on the spatial distribution of ‘Food & Beverage’, ‘Shopping & Retail’ and ‘Medical & Health’ categories, and their associated opening hours. The paper provides a detailed description of data collection and post-processing among possible analysis methods and visualizations presented in the context of our case study. The study focuses on inter-urban structures and urban rhythms through the analysis of opening hours of retail and services. We also discuss the benefits and potential problems associated with the use of these data.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"111 1","pages":"127 - 145"},"PeriodicalIF":5.0,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74570948","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 : 2021-04-04DOI: 10.1080/19475683.2021.1903996
A. Fotheringham, M. Sachdeva
ABSTRACT We discuss the nature of processes relating to human behaviour and how to model such processes when they vary over space. In so doing, we describe the role of local modelling and how the bandwidth parameter, a component of multiscale geographically weighted regression, can inform on the spatial scale over which processes are relatively constant. To do this, we translate properties of spatial data, such as heterogeneity and spatial dependency into the realm of spatial processes. We argue that the modelling of spatially varying processes has important ramifications for how we see the world.
{"title":"Modelling spatial processes in quantitative human geography","authors":"A. Fotheringham, M. Sachdeva","doi":"10.1080/19475683.2021.1903996","DOIUrl":"https://doi.org/10.1080/19475683.2021.1903996","url":null,"abstract":"ABSTRACT We discuss the nature of processes relating to human behaviour and how to model such processes when they vary over space. In so doing, we describe the role of local modelling and how the bandwidth parameter, a component of multiscale geographically weighted regression, can inform on the spatial scale over which processes are relatively constant. To do this, we translate properties of spatial data, such as heterogeneity and spatial dependency into the realm of spatial processes. We argue that the modelling of spatially varying processes has important ramifications for how we see the world.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"93 1","pages":"5 - 14"},"PeriodicalIF":5.0,"publicationDate":"2021-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73561988","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 : 2021-03-27DOI: 10.1080/19475683.2021.1906746
Linchuan Yang, Yuan Liang, Qing Zhu, Xiaoling Chu
ABSTRACT The adoption of bus rapid transit (BRT) systems has gained worldwide popularity over the past several decades. China is no exception as it has long been aiming at promoting public transportation. Prior studies have provided extensive evidence that BRT has substantial effects on house prices with traditional econometric techniques, such as hedonic pricing models. However, few of those investigations have discussed the non-linear relationship between BRT and house prices. Using the Xiamen data, this study employs a machine learning technique, namely the gradient boosting decision tree (GBDT), to scrutinize the non-linear relationship between BRT and house prices. This study documents a positive association between accessibility to BRT stations and house prices and a negative association between proximity to the BRT corridor and house prices. Moreover, it suggests a non-linear relationship between BRT and house prices and indicates that GBDT has more substantial predictive power than hedonic pricing models.
{"title":"Machine learning for inference: using gradient boosting decision tree to assess non-linear effects of bus rapid transit on house prices","authors":"Linchuan Yang, Yuan Liang, Qing Zhu, Xiaoling Chu","doi":"10.1080/19475683.2021.1906746","DOIUrl":"https://doi.org/10.1080/19475683.2021.1906746","url":null,"abstract":"ABSTRACT The adoption of bus rapid transit (BRT) systems has gained worldwide popularity over the past several decades. China is no exception as it has long been aiming at promoting public transportation. Prior studies have provided extensive evidence that BRT has substantial effects on house prices with traditional econometric techniques, such as hedonic pricing models. However, few of those investigations have discussed the non-linear relationship between BRT and house prices. Using the Xiamen data, this study employs a machine learning technique, namely the gradient boosting decision tree (GBDT), to scrutinize the non-linear relationship between BRT and house prices. This study documents a positive association between accessibility to BRT stations and house prices and a negative association between proximity to the BRT corridor and house prices. Moreover, it suggests a non-linear relationship between BRT and house prices and indicates that GBDT has more substantial predictive power than hedonic pricing models.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"90 1","pages":"273 - 284"},"PeriodicalIF":5.0,"publicationDate":"2021-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90673952","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 : 2021-03-22DOI: 10.1080/19475683.2021.1897675
Bipin Chandran, C. Rao, P. Sridevi
ABSTRACT This paper describes a spatial search and a three-level model-based approach for automatic extraction of surface water layers from Sentinel-1 C-band SAR images at 10 m spatial resolution. The technique incorporates a connected component spatial search for segmenting low backscatter regions and uses the segmented image object for characterizing the segments. The water body is described here as a collection of different spatially connected segments. A three-level model is used to describe the connected segments of a water body in SAR data. Noise tolerance is achieved in this method by incorporating a speckle noise level into the model. The segmentation process further calculates contextual information which includes shadow estimated from DEM, polarization angle of the segment, and a boundary co-occurrence in both polarization to qualify the detected segments as a water body. The proposed method is found to have an accuracy of 94% in terms of f1 score. The algorithm, estimation of different parameters, and the results obtained in selected regions are explained in this paper.
{"title":"Spatial search and a three level model based water layer extraction from C-band SAR image","authors":"Bipin Chandran, C. Rao, P. Sridevi","doi":"10.1080/19475683.2021.1897675","DOIUrl":"https://doi.org/10.1080/19475683.2021.1897675","url":null,"abstract":"ABSTRACT This paper describes a spatial search and a three-level model-based approach for automatic extraction of surface water layers from Sentinel-1 C-band SAR images at 10 m spatial resolution. The technique incorporates a connected component spatial search for segmenting low backscatter regions and uses the segmented image object for characterizing the segments. The water body is described here as a collection of different spatially connected segments. A three-level model is used to describe the connected segments of a water body in SAR data. Noise tolerance is achieved in this method by incorporating a speckle noise level into the model. The segmentation process further calculates contextual information which includes shadow estimated from DEM, polarization angle of the segment, and a boundary co-occurrence in both polarization to qualify the detected segments as a water body. The proposed method is found to have an accuracy of 94% in terms of f1 score. The algorithm, estimation of different parameters, and the results obtained in selected regions are explained in this paper.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"31 1","pages":"163 - 176"},"PeriodicalIF":5.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81861872","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 : 2021-02-05DOI: 10.1080/19475683.2022.2041725
Mengxi Zhang, Siqin Wang, T. Hu, Xiaokang Fu, Xiaoyue Wang, Yaxin Hu, B. Halloran, Zhenlong Li, Yunhe Cui, Haokun Liu, Zhimin Liu, S. Bao
ABSTRACT Without a widely distributed vaccine, controlling human mobility has been identified and promoted as the primary strategy to mitigate the transmission of COVID-19. Many studies have reported the relationship between human mobility and COVID-19 transmission by utilizing the spatial-temporal information of mobility data from various sources. To better understand the role of human mobility in the pandemic, we conducted a systematic review of articles that measure the relationship between human mobility and COVID-19 in terms of their data sources, mathematical models, and key findings. Following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement, we selected 47 articles from the Web of Science Core Collection up to September 2020. Restricting human mobility reduced the transmission of COVID-19, although the effectiveness and stringency of policy implementation vary temporally and spatially across different stages of the pandemic. We call for prompt and sustainable measures to control the pandemic. We also recommend researchers 1) to enhance multi-disciplinary collaboration; 2) to adjust the implementation and stringency of mobility-control policies in corresponding to the rapid change of the pandemic; 3) to improve mathematical models used in analysing, simulating, and predicting the transmission of the disease; and 4) to enrich the source of mobility data to ensure data accuracy and suability.
在没有广泛分布的疫苗的情况下，控制人员流动已被确定并推广为减轻COVID-19传播的主要策略。许多研究利用各种来源的人员流动数据的时空信息，报道了人员流动与COVID-19传播的关系。为了更好地了解人员流动在大流行中的作用，我们从数据来源、数学模型和主要发现等方面对衡量人员流动与COVID-19之间关系的文章进行了系统回顾。根据系统评价和荟萃分析首选报告项目(PRISMA)声明的指导方针，我们从Web of Science核心馆藏中选择了截至2020年9月的47篇文章。限制人员流动减少了COVID-19的传播，尽管在大流行的不同阶段，政策执行的有效性和严格程度在时间和空间上有所不同。我们呼吁采取迅速和可持续的措施来控制这一流行病。我们也建议研究者1)加强多学科合作;2)根据疫情的快速变化，调整流动控制政策的实施和力度;3)改进用于分析、模拟和预测疾病传播的数学模型;4)丰富出行数据来源，保证数据的准确性和可持续性。
{"title":"Human mobility and COVID-19 transmission: a systematic review and future directions","authors":"Mengxi Zhang, Siqin Wang, T. Hu, Xiaokang Fu, Xiaoyue Wang, Yaxin Hu, B. Halloran, Zhenlong Li, Yunhe Cui, Haokun Liu, Zhimin Liu, S. Bao","doi":"10.1080/19475683.2022.2041725","DOIUrl":"https://doi.org/10.1080/19475683.2022.2041725","url":null,"abstract":"ABSTRACT Without a widely distributed vaccine, controlling human mobility has been identified and promoted as the primary strategy to mitigate the transmission of COVID-19. Many studies have reported the relationship between human mobility and COVID-19 transmission by utilizing the spatial-temporal information of mobility data from various sources. To better understand the role of human mobility in the pandemic, we conducted a systematic review of articles that measure the relationship between human mobility and COVID-19 in terms of their data sources, mathematical models, and key findings. Following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement, we selected 47 articles from the Web of Science Core Collection up to September 2020. Restricting human mobility reduced the transmission of COVID-19, although the effectiveness and stringency of policy implementation vary temporally and spatially across different stages of the pandemic. We call for prompt and sustainable measures to control the pandemic. We also recommend researchers 1) to enhance multi-disciplinary collaboration; 2) to adjust the implementation and stringency of mobility-control policies in corresponding to the rapid change of the pandemic; 3) to improve mathematical models used in analysing, simulating, and predicting the transmission of the disease; and 4) to enrich the source of mobility data to ensure data accuracy and suability.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"66 1","pages":"501 - 514"},"PeriodicalIF":5.0,"publicationDate":"2021-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83836813","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 : 2021-01-17DOI: 10.1080/19475683.2021.1875047
B. Beaumont, T. Grippa, M. Lennert
ABSTRACT Regional land use monitoring at high spatial, temporal, and thematic resolution is an important expectation of Walloon stakeholders. Over the last decade, increased data-processing capacities and the annual acquisition of remotely sensed data have resulted in the production of a large amount of relevant geodata. The INSPIRE directive and its obligations for 2020 serve as a path for the development of a new user-driven and open-source hierarchical land use classification system mapping scheme, as presented in this paper. The process includes intensive user consultation, the development of an entire automatic processing chain, and efforts to address challenges such as big data handling, the variability of input data properties, and reproducibility. The thematically detailed land use map, with its 69 classes, is already widely used by Walloon stakeholders, and new demands for updating have already emerged. Based on a European classification system that is compulsory for all member states, INSPIRE-compliant land use maps will make it possible to carry out cross-border studies and compare spatial planning strategies between states.
{"title":"A user-driven process for INSPIRE-compliant land use database: example from Wallonia, Belgium","authors":"B. Beaumont, T. Grippa, M. Lennert","doi":"10.1080/19475683.2021.1875047","DOIUrl":"https://doi.org/10.1080/19475683.2021.1875047","url":null,"abstract":"ABSTRACT Regional land use monitoring at high spatial, temporal, and thematic resolution is an important expectation of Walloon stakeholders. Over the last decade, increased data-processing capacities and the annual acquisition of remotely sensed data have resulted in the production of a large amount of relevant geodata. The INSPIRE directive and its obligations for 2020 serve as a path for the development of a new user-driven and open-source hierarchical land use classification system mapping scheme, as presented in this paper. The process includes intensive user consultation, the development of an entire automatic processing chain, and efforts to address challenges such as big data handling, the variability of input data properties, and reproducibility. The thematically detailed land use map, with its 69 classes, is already widely used by Walloon stakeholders, and new demands for updating have already emerged. Based on a European classification system that is compulsory for all member states, INSPIRE-compliant land use maps will make it possible to carry out cross-border studies and compare spatial planning strategies between states.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"94 1","pages":"211 - 224"},"PeriodicalIF":5.0,"publicationDate":"2021-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82322806","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 : 2021-01-15DOI: 10.1080/19475683.2021.1871950
Biplob Rakhal, T. R. Adhikari, Sanjib Sharma, G. Ghimire
ABSTRACT River flow exhibits morphological changes over time. The shifting of river channels is a common natural phenomenon which often poses risk to life and property. Channel shifting is mostly associated with weak geology, extreme floods, and land cover alterations. Here we assess the changing morphology of the largest depositional landform in Nepal, called the Karnali Megafan, over the period of 1977–2013. We applied geographic information system (GIS) and remote sensing techniques to analyse the spatiotemporal changes in the Karnali Megafan. We obtained historical channel information from Landsat Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TRIS) satellite image, Landsat Enhanced Thematic Mapper Plus (ETM+), Thematic Mapper (TM) and Multispectral Scanner (MSS) for years 1977, 1990, 2000, 2010 and 2013. The channel shifting depicts a generally increasing trend in the right branch while the trend is less prominent in the left branch. We find that the extreme rainfall and flooding contribute to channel shifting in the Karnali Megafan. This study identifies the channel shifting spatiotemporal trends along the Karnali Megafan and are of practical use in developing and implementing appropriate river management strategies.
河流流量随时间呈现形态变化。河道移位是一种常见的自然现象，它经常对生命和财产造成威胁。河道移动主要与脆弱的地质、极端洪水和土地覆盖变化有关。在这里，我们评估了尼泊尔最大的沉积地貌，称为卡纳利Megafan，在1977-2013年期间的变化形态。应用地理信息系统(GIS)和遥感技术对卡纳里Megafan的时空变化进行了分析。利用Landsat Operational Land Imager (OLI)和热红外传感器(TRIS)卫星图像、Landsat Enhanced Thematic Mapper Plus (ETM+)、Thematic Mapper (TM)和Multispectral Scanner (MSS)获取了1977、1990、2000、2010和2013年的历史通道信息。通道移动在右支路表现出普遍增加的趋势，而在左支路表现出不太明显的趋势。研究发现，极端降雨和洪水对卡纳里Megafan的河道移动有促进作用。本研究确定了卡纳利Megafan流域河道转移的时空趋势，对制定和实施适当的河流管理策略具有实际意义。
{"title":"Assessment of channel shifting of Karnali Megafan in Nepal using remote sensing and GIS","authors":"Biplob Rakhal, T. R. Adhikari, Sanjib Sharma, G. Ghimire","doi":"10.1080/19475683.2021.1871950","DOIUrl":"https://doi.org/10.1080/19475683.2021.1871950","url":null,"abstract":"ABSTRACT River flow exhibits morphological changes over time. The shifting of river channels is a common natural phenomenon which often poses risk to life and property. Channel shifting is mostly associated with weak geology, extreme floods, and land cover alterations. Here we assess the changing morphology of the largest depositional landform in Nepal, called the Karnali Megafan, over the period of 1977–2013. We applied geographic information system (GIS) and remote sensing techniques to analyse the spatiotemporal changes in the Karnali Megafan. We obtained historical channel information from Landsat Operational Land Imager (OLI) and the Thermal InfraRed Sensor (TRIS) satellite image, Landsat Enhanced Thematic Mapper Plus (ETM+), Thematic Mapper (TM) and Multispectral Scanner (MSS) for years 1977, 1990, 2000, 2010 and 2013. The channel shifting depicts a generally increasing trend in the right branch while the trend is less prominent in the left branch. We find that the extreme rainfall and flooding contribute to channel shifting in the Karnali Megafan. This study identifies the channel shifting spatiotemporal trends along the Karnali Megafan and are of practical use in developing and implementing appropriate river management strategies.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"45 1","pages":"177 - 188"},"PeriodicalIF":5.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88629601","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 : 2021-01-11DOI: 10.1080/19475683.2020.1871406
Mateso Said, C. Hyandye, H. Komakech, I. C. Mjemah, L. Munishi
ABSTRACT Increasing demand for food production results in Land use and land cover (LULC) changes, which afflicts the provision of ecosystem services in high mountain areas. This work used time-series LULC and selected spatial metrics to predict the LULC changes for Kikafu-Weruweru-Karanga (KWK) watershed (on the southern slopes of Mt. Kilimanjaro) for the next decade. LULC maps were generated by classifying time-series satellite images. We further predicted the implications for selected staple crop production over the next decade. The simulated LULC shows expansion in built-up (by 32.55%/27.04 km2) and agriculture (by 39.52%/52.0 km2) areas from 2018 to 2030. These results suggest that urbanization is likely the next biggest threat to water availability and food production. Grasslands and wetlands are expected to decrease by 57.24% and 39.29%, respectively. The forest area is likely to shrink by 6.37%, about 9.82 km2, and 1.26 km2 being converted to agriculture and built-up areas, respectively. However, expansion in agricultural land shows very little increase in staple food crop production records, suggesting that farm size plays a minor role in increasing crop production. Predicting the near future LULC around KWK is useful for evaluating the likelihood of achieving development and conservation targets that are set locally, nationally and internationally.
{"title":"Predicting land use/cover changes and its association to agricultural production on the slopes of Mount Kilimanjaro, Tanzania","authors":"Mateso Said, C. Hyandye, H. Komakech, I. C. Mjemah, L. Munishi","doi":"10.1080/19475683.2020.1871406","DOIUrl":"https://doi.org/10.1080/19475683.2020.1871406","url":null,"abstract":"ABSTRACT Increasing demand for food production results in Land use and land cover (LULC) changes, which afflicts the provision of ecosystem services in high mountain areas. This work used time-series LULC and selected spatial metrics to predict the LULC changes for Kikafu-Weruweru-Karanga (KWK) watershed (on the southern slopes of Mt. Kilimanjaro) for the next decade. LULC maps were generated by classifying time-series satellite images. We further predicted the implications for selected staple crop production over the next decade. The simulated LULC shows expansion in built-up (by 32.55%/27.04 km2) and agriculture (by 39.52%/52.0 km2) areas from 2018 to 2030. These results suggest that urbanization is likely the next biggest threat to water availability and food production. Grasslands and wetlands are expected to decrease by 57.24% and 39.29%, respectively. The forest area is likely to shrink by 6.37%, about 9.82 km2, and 1.26 km2 being converted to agriculture and built-up areas, respectively. However, expansion in agricultural land shows very little increase in staple food crop production records, suggesting that farm size plays a minor role in increasing crop production. Predicting the near future LULC around KWK is useful for evaluating the likelihood of achieving development and conservation targets that are set locally, nationally and internationally.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"2010 1","pages":"189 - 209"},"PeriodicalIF":5.0,"publicationDate":"2021-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86295671","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 : 2021-01-05DOI: 10.1080/19475683.2020.1870558
Nasibul Alam, Subrata Saha, Srimanta Gupta, S. Chakraborty
ABSTRACT Presently, sustainability of floodplain, a diverse element of the riverine landscape, provides an ideal research setting for investigating complex interaction between anthropogenic disturbance and eco-environmental degradation. Nowadays, these floodplains are continually degraded and fragmented on account of unsustainable land use. To analyse the spatial and temporal changes of landuse/landcover, a supervised classification (maximum likelihood algorithm) method has been made for the period 1998 to 2018. Present research simulates and predicts landuse/landcover dynamics of lower stretch of the Ganges river up to 2038 to analyse future riverine landscape dynamics stressed by various natural and socio-economic factors based on Cellular Automata-Artificial Neuron Network (CA-ANN) model clubbed with Modules for Land Use Change Evaluation (MOLUSCE) plugin of QGIS software. Outcome of research reveals that the trend of agriculture land, sand, and inland waterbody areas is reduced by 15.75, 5.71, and 1.95%, whereas, for orchard, agricultural fallow and bare land areas increased by 7.94, 7.92, and 5.69% for the period from 1998 to 2018. The simulation model predicted a continuation of the similar trend till 2038. The significant reduction of agricultural land and sand areas is largely an attribute to floodplain degradation in an altered hydrological regime. Ultimately, hydro-morphological changes, increasing population pressure, and agriculture intensification in floodplain landscape were identified as main driving forces in temporal landuse/landcover changes. The prediction of future forecast indicates that if the present rate of landuse/landcover trend persists in the study stretch of Ganges river without appropriate sustainable development practice, severe floodplain degradation will ensue. This study provides a holistic measure for understanding long-term environmental degradation related to anthropogenic activities and impact of climate changes in floodplain landscape at local and regional scale.
{"title":"Prediction modelling of riverine landscape dynamics in the context of sustainable management of floodplain: a Geospatial approach","authors":"Nasibul Alam, Subrata Saha, Srimanta Gupta, S. Chakraborty","doi":"10.1080/19475683.2020.1870558","DOIUrl":"https://doi.org/10.1080/19475683.2020.1870558","url":null,"abstract":"ABSTRACT Presently, sustainability of floodplain, a diverse element of the riverine landscape, provides an ideal research setting for investigating complex interaction between anthropogenic disturbance and eco-environmental degradation. Nowadays, these floodplains are continually degraded and fragmented on account of unsustainable land use. To analyse the spatial and temporal changes of landuse/landcover, a supervised classification (maximum likelihood algorithm) method has been made for the period 1998 to 2018. Present research simulates and predicts landuse/landcover dynamics of lower stretch of the Ganges river up to 2038 to analyse future riverine landscape dynamics stressed by various natural and socio-economic factors based on Cellular Automata-Artificial Neuron Network (CA-ANN) model clubbed with Modules for Land Use Change Evaluation (MOLUSCE) plugin of QGIS software. Outcome of research reveals that the trend of agriculture land, sand, and inland waterbody areas is reduced by 15.75, 5.71, and 1.95%, whereas, for orchard, agricultural fallow and bare land areas increased by 7.94, 7.92, and 5.69% for the period from 1998 to 2018. The simulation model predicted a continuation of the similar trend till 2038. The significant reduction of agricultural land and sand areas is largely an attribute to floodplain degradation in an altered hydrological regime. Ultimately, hydro-morphological changes, increasing population pressure, and agriculture intensification in floodplain landscape were identified as main driving forces in temporal landuse/landcover changes. The prediction of future forecast indicates that if the present rate of landuse/landcover trend persists in the study stretch of Ganges river without appropriate sustainable development practice, severe floodplain degradation will ensue. This study provides a holistic measure for understanding long-term environmental degradation related to anthropogenic activities and impact of climate changes in floodplain landscape at local and regional scale.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"384 2 1","pages":"299 - 314"},"PeriodicalIF":5.0,"publicationDate":"2021-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73124534","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}
ABSTRACT Geographic Information Science (GIS) Major in China has been developing and flourishing for nearly 40 years. Chinese educators have made many achievements on major construction in GIS. However, opportunities and challenges coexist under the new situation of ‘Double First-Rate’ major construction in China. Thus, investigating and analysing the major status comprehensively are necessary for enhancing the development of the GIS major. This study analyses the enrolment magnitude of undergraduate and postgraduate students, student development, construction of teaching team and professional curriculum construction for GIS majors in mainland Chinese universities. The professional survey results showed that there are about 30,000 undergraduates and 4,000 postgraduates who graduate with GIS degrees every year. However, most of the undergraduates in this major do not take gGIS as their first choice in college major selection. In addition, 190 colleges and universities have set up GIS majors, who have played an important role in the development of GIS and industry. These colleges and universities are mostly concentrated in China’s central and eastern regions. The Education and Popularization Science Working Committee of the China Association for Geographic Information Society and the Ministry of Education’s Education Committee and other institutions have also organized several meaningful activities to strengthen the guidance of the GIS professional construction. A complete education system has been established to train undergraduates and postgraduates for the development of the geographic information industry in China.
{"title":"Status analysis of geographic information science major in Chinese higher education","authors":"Shuliang Zhang, Ying Chen, Xin Yang, Li-yang Xiong, Zhenzhen Liu, G. Tang","doi":"10.1080/19475683.2021.1883108","DOIUrl":"https://doi.org/10.1080/19475683.2021.1883108","url":null,"abstract":"ABSTRACT Geographic Information Science (GIS) Major in China has been developing and flourishing for nearly 40 years. Chinese educators have made many achievements on major construction in GIS. However, opportunities and challenges coexist under the new situation of ‘Double First-Rate’ major construction in China. Thus, investigating and analysing the major status comprehensively are necessary for enhancing the development of the GIS major. This study analyses the enrolment magnitude of undergraduate and postgraduate students, student development, construction of teaching team and professional curriculum construction for GIS majors in mainland Chinese universities. The professional survey results showed that there are about 30,000 undergraduates and 4,000 postgraduates who graduate with GIS degrees every year. However, most of the undergraduates in this major do not take gGIS as their first choice in college major selection. In addition, 190 colleges and universities have set up GIS majors, who have played an important role in the development of GIS and industry. These colleges and universities are mostly concentrated in China’s central and eastern regions. The Education and Popularization Science Working Committee of the China Association for Geographic Information Society and the Ministry of Education’s Education Committee and other institutions have also organized several meaningful activities to strengthen the guidance of the GIS professional construction. A complete education system has been established to train undergraduates and postgraduates for the development of the geographic information industry in China.","PeriodicalId":46270,"journal":{"name":"Annals of GIS","volume":"285 1","pages":"111 - 126"},"PeriodicalIF":5.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77881733","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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