GI_Forum最新文献_第6页

Spatial Operators for Complex Event Processing 复杂事件处理的空间算子

GI_Forum Pub Date : 2020-01-01 DOI: 10.1553/giscience2020_02_s107

Julian Bruns, Florian Micklich, Johannes Kutterer, A. Abecker, Philipp Zehnder

{"title":"Spatial Operators for Complex Event Processing","authors":"Julian Bruns, Florian Micklich, Johannes Kutterer, A. Abecker, Philipp Zehnder","doi":"10.1553/giscience2020_02_s107","DOIUrl":"https://doi.org/10.1553/giscience2020_02_s107","url":null,"abstract":"The types of data available have changed in the last decade. While, historically, data were gathered in batches and distributed as such, e.g. as a database or shapefile, today we are dealing increasingly with real-time data. This data is produced and consumed continuously in real time. The phenomenon is most commonly known as streaming data. Traditionally, software for spatial analysis, such as a Geographical Information System (GIS) or spatial database, was created and optimized for the batch processing of data. However, the inherent characteristics of streaming data provide new challenges for data-stream processing systems, which have not yet been solved. In this paper, we propose enhancing systems for the handling and analysis of streaming data through the use of spatial operators. We identify Complex Event Processing (CEP) as a promising underlying concept for such a system and use the (open source) self-service IoT toolbox ‘StreamPipes’ as a representative for this. On the basis of a review of the literature, we selected 6 core types of spatial operator and implemented 33 basic spatial operators in 11 groups. These can be combined with the existing non-spatial operators for in-depth analysis of streaming data that involves spatial","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80361780","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}

引用次数: 1

Characterising Agricultural Landscapes using Landscape Metrics and Cluster Analysis in Brandenburg, Germany 基于景观度量和聚类分析的勃兰登堡农业景观特征研究

GI_Forum Pub Date : 2020-01-01 DOI: 10.1553/giscience2020_01_s89

Saskia Wolff, T. Lakes

{"title":"Characterising Agricultural Landscapes using Landscape Metrics and Cluster Analysis in Brandenburg, Germany","authors":"Saskia Wolff, T. Lakes","doi":"10.1553/giscience2020_01_s89","DOIUrl":"https://doi.org/10.1553/giscience2020_01_s89","url":null,"abstract":"An increasing demand for agricultural products within the past years has led to increasing agricultural intensification. Various agricultural compositions and landscape configurations can have different impacts on the provision of ecosystem services. The EU follows the aim of supporting and developing sustainable food production systems. We use the plot-based data provided by the Integrated Administration and Control System (IACS) to identify different types of agricultural landscapes and their spatial distribution in Brandenburg, Germany. By calculating a set of landscape metrics to characterise agricultural land use, we were able to identify six types of agricultural landscapes by a Two-Step cluster analysis for a hexagonal grid. Thereby, the majority of Brandenburg is covered by agriculture characterised by high share of cropland but different degrees of fragmentation. By providing a framework using landscape metrics derived from IACS data, the approach of clustering to identify typologies is highly transferable to other regions within the EU and may provide an important asset for offering new units of analysis for a better tailored environmental and agricultural planning depending on the local to regional characteristics.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75561820","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}

引用次数: 3

Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest 基于随机森林的爱沙尼亚阿尔瓦草原植被土地适宜性分析

GI_Forum Pub Date : 2020-01-01 DOI: 10.1553/giscience2020_01_s63

I. Ismayilova, E. Uuemaa, A. Helm, Christian Röger, S. Timpf

{"title":"Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest","authors":"I. Ismayilova, E. Uuemaa, A. Helm, Christian Röger, S. Timpf","doi":"10.1553/giscience2020_01_s63","DOIUrl":"https://doi.org/10.1553/giscience2020_01_s63","url":null,"abstract":"Calcareous alvar grasslands are one of the most species-rich habitats in Estonia. Land-use change and cessation of traditional agricultural practices have led to a decrease of the area of these valuable grasslands during the past century. Therefore, their conservation and restoration are becoming increasingly important. Efforts to restore these habitats have already been made in recent years. Land suitability analysis for potential restoration sites, using the machine learning technique Random Forest (RF), was performed for the first time in this study, which aimed to assess the use of RF for a suitability analysis of alvar grassland. RF predicted 610.91 km2 of areas suitable for restoring alvar grasslands or for creating alvarlike habitats in Estonia. These areas include all existing alvar areas as well an additional 140.91 km2 suitable for establishing new habitat similar to calcareous alvar grasslands. We discuss suitability analysis to help with restoration planning and find it to be a reasonable and efficient tool that has potential to provide relevant information. The quality of the prediction could be improved by including additional data relevant for alvar grasslands, such as soil depth, but such data was unfortunately unavailable.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84201528","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}

引用次数: 1

Using Spatial Concepts to Integrate Data and Information from Various Sources for a Knowledge-based Assessment of Impervious Surfaces 利用空间概念整合来自不同来源的数据和信息，对不透水表面进行基于知识的评估

GI_Forum Pub Date : 2020-01-01 DOI: 10.1553/giscience2020_02_s147

T. Strasser, D. Tiede

{"title":"Using Spatial Concepts to Integrate Data and Information from Various Sources for a Knowledge-based Assessment of Impervious Surfaces","authors":"T. Strasser, D. Tiede","doi":"10.1553/giscience2020_02_s147","DOIUrl":"https://doi.org/10.1553/giscience2020_02_s147","url":null,"abstract":"In this study, we present a concept for the assessment of impervious surfaces integrating VHR satellite data and a-priori information from additional datasets. Spatial concepts like neighbourhood and region, distance, spatial dependence or spatial variability are adapted in a knowledge-based approach using an object-based image analysis model to accumulate evidence from different sources. We look at constraints for timely and comprehensive VHR optical data acquisition that covers larger areas with adequate image characteristics (sensor family, seasonality, sensor viewing angles and sun inclination). For a study area covering the municipality of Hallein (Austria), we discuss preliminary results with a focus on real-world object characterization (including surface material, spectral reflectivity, object size and shape) and on building a knowledge-base for the classification of real-world objects. We also assess image characteristics and effects on image analysis. The knowledge about real-world object characteristics and image object statistics will be used to develop an integrated approach that aims for transferability to larger areas. future developments and data.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81303044","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}

引用次数: 0

Sustainability Objectives of Non-Profit Sharing-Economy Activities: Assessing Achievement. A Case Study of the Mundraub Food-Sharing Poject 非营利性共享经济活动的可持续性目标:绩效评估。蒙德劳布食物共享项目案例研究

GI_Forum Pub Date : 2019-12-12 DOI: 10.1553/giscience2019_02_s24

S. Hennig

{"title":"Sustainability Objectives of Non-Profit Sharing-Economy Activities: Assessing Achievement. A Case Study of the Mundraub Food-Sharing Poject","authors":"S. Hennig","doi":"10.1553/giscience2019_02_s24","DOIUrl":"https://doi.org/10.1553/giscience2019_02_s24","url":null,"abstract":"Web-based participation has received growing interest over recent years. Such participation includes both profit- and non-profit-oriented sharing-economy initiatives. Not-for-profit sharing-economy initiatives focus less on economic aspects and more on awareness-raising in society regarding sustainability objectives (e.g. sustainable production and consumption of goods). In the current discussions around climate change and sustainable lifestyles, awareness-raising is important and new ways of reaching the public are attracting more interest. The question now is not simply to what extent non-profit sharing-initiatives achieve their goals, but how to assess any achievement as, due to the nature of these projects, little information on the participants’ background, perspectives and behaviour is available. These questions are discussed with reference to the Mundraub project, which allows people to share information on plants (e.g. fruit and nut trees, berry bushes and herbs) in public urban spaces (primarily German cities) so that others can harvest the plants for free. To learn about how sustainability objectives are achieved, data for the sites where the plants that have been mapped to Mundraub are located were analysed statistically. The results indicate that the people who are reached by the Mundraub project are mostly those who are already interested and aware of sustainability-related topics. The assessment approach used is a first attempt towards a better understanding of the extent to which the sustainability objectives of non-profit sharing-economy activities have been reached and towards identifying how the achievement of objectives might be improved on.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82683438","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}

引用次数: 0

Associations of Body Mass Index with Food Environments, Physical Activity and Smoking 体重指数与食物环境、体力活动和吸烟的关系

GI_Forum Pub Date : 2019-12-11 DOI: 10.1553/giscience2019_02_s10

Pablo Cabrera-Barona, Myriam Paredes, D. Cole

引用次数: 2

Fostering Valuable Participation in Shaping Spaces and Societies: Towards Creating an Ethical Meta Level in the Model Design for Innovativeness 在塑造空间和社会中培养有价值的参与:在创新模式设计中创建道德元层面

GI_Forum Pub Date : 2019-12-11 DOI: 10.1553/giscience2019_02_s180

C. Scharf, Inga Gryl

引用次数: 0

Aerial and Terrestrial Photogrammetric Point Cloud Fusion for Intensive Forest Monitoring 面向集约森林监测的航空和陆地摄影测量点云融合

GI_Forum Pub Date : 2019-12-11 DOI: 10.1553/giscience2019_02_s60

Stuart Krause

引用次数: 0

Creation of Nominal Asset Value-Based Maps using GIS: A Case Study of Istanbul Beyoglu and Gaziosmanpasa Districts 利用GIS创建名义资产价值为基础的地图:以伊斯坦布尔Beyoglu和Gaziosmanpasa地区为例

GI_Forum Pub Date : 2019-12-11 DOI: 10.1553/giscience2019_02_s98

M. Mete, T. Yomralioglu

引用次数: 6

Mapping for Community-Driven Neighbourhood Planning: The Case of the South Bronx Land and Community Resource Trust 社区驱动的邻里规划:以南布朗克斯土地和社区资源信托基金为例

GI_Forum Pub Date : 2019-06-19 DOI: 10.1553/GISCIENCE2019_01_S148

Monica Flores Castillo, Stephan Petryczka, Joyce Choi-Li, K. Ludwig

{"title":"Mapping for Community-Driven Neighbourhood Planning: The Case of the South Bronx Land and Community Resource Trust","authors":"Monica Flores Castillo, Stephan Petryczka, Joyce Choi-Li, K. Ludwig","doi":"10.1553/GISCIENCE2019_01_S148","DOIUrl":"https://doi.org/10.1553/GISCIENCE2019_01_S148","url":null,"abstract":"The South Bronx neighbourhood in New York City has historically been oppressed and left behind by urban planning policies that deliberately created social exclusion in the area. We Stay/Nos Quedamos, a community development organization located in the area, is actively seeking to establish a Community Land Trust, a mechanism designed to provide homeownership affordability to low-income households. This study seeks to identify potential sites suitable for acquisition and for establishing a Community Land Trust in the South Bronx area. Analysis is performed using Geographic Information Systems in combination with official New York City data. Moreover, by leveraging the local knowledge of Nos Quedamos, we propose a critical approach to GIS and official data. The results of this study will help Nos Quedamos and local stakeholders in decision-making, support political efforts and negotiations with local authorities in the establishment of a Community Land Trust, enhance housing affordability, and consolidate community-managed open spaces in the South Bronx. Furthermore, the methodology presented here could serve as a guide for other local organizations seeking to establish similar land trusts in their localities, especially in urban settings with a high demand for land acquisition.","PeriodicalId":29645,"journal":{"name":"GI_Forum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80013634","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}

引用次数: 1