A CyberGIS approach is presented in this chapter where microscopic traffic simulation and gas dis... more A CyberGIS approach is presented in this chapter where microscopic traffic simulation and gas dispersion simulation systems are combined in order to estimate atmospheric pollution for different scenarios. The combination of these two simulation models allows for detailed investigations of different situations such as the investigation of pollution impacts of different traffic infrastructure variants, as well as for prediction of expected pollution and whether pollutant thresholds will be exceeded. For different case studies, real data about traffic movements provided by the state government, a digital terrain model of the area as well as real measurements of atmospheric data have been used. The evaluation of the approach shows that variations in the settings, regarding traffic or atmospheric conditions, lead to different patterns of observed pollution. The CyberGIS environment described is used to run multiple simulations on a distributed cyberinfrastructure, where the high-end computational resources are available on servers in Europe and in North America.
The United States is on the cusp of generational change. In the next two decades, the “baby boome... more The United States is on the cusp of generational change. In the next two decades, the “baby boomers” will age out of the workforce and will be replaced by a more ethnic, more foreign-born generation. Dowell Myers considers the fiscal and political challenges that immigration presents for the country in Immigrants and Boomers. In the first half of the book, Myers presents ideas about what generates public opposition to immigration, the purpose being to help find policies to address immigration that the public would be willing to accept. His ...
This unit continues the examination of spatial interpolation by looking at areal interpolation te... more This unit continues the examination of spatial interpolation by looking at areal interpolation techniques and some applications. Non-volume preserving and volume preserving methods are described, and two special cases of interpolation—mapping populated areas and estimating trade areas—are outlined. The unit concludes with notes on the conceptual foundation of interpolation and its appropriate uses in GIS.
A CyberGIS approach is presented in this chapter where microscopic traffic simulation and gas dis... more A CyberGIS approach is presented in this chapter where microscopic traffic simulation and gas dispersion simulation systems are combined in order to estimate atmospheric pollution for different scenarios. The combination of these two simulation models allows for detailed investigations of different situations such as the investigation of pollution impacts of different traffic infrastructure variants, as well as for prediction of expected pollution and whether pollutant thresholds will be exceeded. For different case studies, real data about traffic movements provided by the state government, a digital terrain model of the area as well as real measurements of atmospheric data have been used. The evaluation of the approach shows that variations in the settings, regarding traffic or atmospheric conditions, lead to different patterns of observed pollution. The CyberGIS environment described is used to run multiple simulations on a distributed cyberinfrastructure, where the high-end computational resources are available on servers in Europe and in North America.
The United States is on the cusp of generational change. In the next two decades, the “baby boome... more The United States is on the cusp of generational change. In the next two decades, the “baby boomers” will age out of the workforce and will be replaced by a more ethnic, more foreign-born generation. Dowell Myers considers the fiscal and political challenges that immigration presents for the country in Immigrants and Boomers. In the first half of the book, Myers presents ideas about what generates public opposition to immigration, the purpose being to help find policies to address immigration that the public would be willing to accept. His ...
This unit continues the examination of spatial interpolation by looking at areal interpolation te... more This unit continues the examination of spatial interpolation by looking at areal interpolation techniques and some applications. Non-volume preserving and volume preserving methods are described, and two special cases of interpolation—mapping populated areas and estimating trade areas—are outlined. The unit concludes with notes on the conceptual foundation of interpolation and its appropriate uses in GIS.
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Papers by Nigel Waters