The Internet of Things, crowdsourcing, social media, public authorities, and other sources generate bigger and bigger data sets. Big and open data offers many benefits for emergency management, but also pose new challenges. This chapter will review the sources of big data and their characteristics. We then discuss potential benefits of big data for emergency management along with the technological and societal challenges it poses. We review central technologies for big-data storage and processing in general, before presenting the Spark big-data engine in more detail. Finally, we review ethical and societal threats that big data pose.
翻译：物的互联网、众包、社交媒体、公共当局和其他来源生成了更大、更大的数据集。大开放数据为应急管理带来许多好处,但也带来了新的挑战。本章将审查海量数据的来源及其特点。然后我们讨论海量数据对应急管理的潜在好处以及它带来的技术和社会挑战。我们审查大数据储存和处理的中央技术,然后更详细地介绍斯帕克大数据引擎。最后,我们审查海量数据构成的伦理和社会威胁。
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