1,741,361 research outputs found
Test Networks from "Measuring the Structure of Road Networks"
No full textThe networks used in Figure 5 (Xie and Levinson (2007) Measuring the Structure of Road Networks) are in 16 simple ASCII node and link tables. The 12 derived network structures are obtained by using a simulation model called the degeneration model (Xie and Levinson (2008) The weakest link: The decline of the surface transportation network). The simulator are written in Java and named "SOUND – System for Ultraconnected Network Degeneration" (Xie and Levinson (2016).Fig. 5 displays four base networks , 15 x 15 90° network (A0), 15 x 15 45° network (B0), and 15 x 15 30° network (C0), and 4 x 4 complete network (D0), as well as 12 network structures derived from them (three for each). As can be seen, links have been specified as five different hierarchies [1-5]. The boldness and grayness of a link indicates its hierarchy level and a bolder and darker link represents a road of a higher hierarchy. This study examines these 16 networks with proposed structural measures. (p 348 of Xie and Levinson (2007) Measuring the Structure of Road Networks)Levinson, David M; Xie, Feng. (2016). Test Networks from "Measuring the Structure of Road Networks". Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D6C30V
1920-1995 Twin Cities State Highway Network
No full textVector line data with highway centerlines. Features may have attributes indicating year built and/or year divided. Also includes a PDF illustrating the data.Illustrates the development of the highway network in the Twin Cities metropolitan region. GIS maps of the state highway network were created for 1920-1995 (these were not previously digitized). These were used to build Markov Chain Cellular Automata models of land use change and network growth.MnDOT Report 2003-37Minnesota Department of TransportationContract #: (c) 81655 (wo) 8If They Come, Will You Build It? Urban Transportation Network Growth ModelsChen, Wei; Levinson, David M. (2014). 1920-1995 Twin Cities State Highway Network. Retrieved from the Data Repository for the University of Minnesota (DRUM), http://dx.doi.org/10.13020/D6CC78
1958 Twin Cities Land Use Map from the Twin Cities Metropolitan Planning Commission, GIS Data Files
No full textThe GIS shapefiles were exported using ArcGIS Quick Import Tool from the Data Interoperability Toolbox. The coverage files was imported into a file geodatabase then exported to a .shp file for long-term use without proprietary software. An example output of the final GIS file is include as a pdf, in addition, a scan of the original 1958 map (held in the UMN Borchert Map Library) is included as a pdf. Metadata was extracted as an xml file. Finally, all associated coverage files and original map scans were zipped into one file for download and reuse.High-quality GIS land use maps for the Twin Cities Metropolitan Area for 1958 that were developed from paper maps (no GIS version existed previously).MnDOT Report 2003-37Minnesota Department of TransportationContract #: (c) 81655 (wo) 8If They Come, Will You Build It? Urban Transportation Network Growth Models.Chen, Wei; Levinson, David M. (2013). 1958 Twin Cities Land Use Map from the Twin Cities Metropolitan Planning Commission, GIS Data Files. Retrieved from the University Digital Conservancy, http://dx.doi.org/10.13020/D6059J
Letter from A.F. Levinson to Helen Farr, September 16, 1932
No full text1 leaf (double-sided)Letter from A.F. Levinson to Helen Farr, September 16, 193
Letter from A.F. Levinson to Helen Farr, September 16, 1932
No full text1 leaf (double-sided)Letter from A.F. Levinson to Helen Farr, September 16, 193
Letter from A.F. Levinson to John Sloan, 1932
No full text4 leaves (single sided)Letter from A.F. Levinson to John Sloan, 1932
Regarding John Sloan's resignation as the President of the Art Student's League
SONIC - System of Network Incremental Connections
No full textThis is an applet that runs in Java, and the code and data files are included in a single zipped folder. To run the package, import the files as a project into Eclipse or another java platform. Run the main class, sonic.java, as an applet.The software contains a network-growth simulation model. The logic is based on the strongest-link assumption (ie for a link to be constructed, it must be ranked the highest in terms of increasing accessibility between the two blocks it connects).Xie, Feng; Levinson, David M. (2016). SONIC - System of Network Incremental Connections. Retrieved from the University Digital Conservancy, http://doi.org/10.13020/D6ZW2T
Letter from A. F. Levinson to Helen Farr Sloan, November 12, 1950
No full text2 leaves (single sided)Letter from A. F. Levinson to Helen Farr Sloan, November 12, 195
Letter from A. F. Levinson to Helen Farr Sloan, November 12, 1950
No full text2 leaves (single sided)Letter from A. F. Levinson to Helen Farr Sloan, November 12, 195
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