Livestrong Democratic Presidental Candidate Cancer Forum, August 27, 2007

Speech by Governor Culver.

Pieces of Iowa’s Past, February 1, 2012

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. February 1, 2012 THIS WEEK: A Different Oath for Senator Vale BACKGROUND: Senator Jacob G. Vale was born July 7, 1821, in York County, Pennsylvania. In 1847, he married Anne Rex, and they moved to Iowa in 1850. Vale farmed in Lee County, and in 1853, he ran on an independent ticket for the legislature but was defeated. He moved to Van Buren County in 1856. In 1861, he was solicited by both parties to become a candidate for the state Senate. He was elected and served as the only independent senator in the 13th General Assembly. Vale also served in the 14th General Assembly in 1872. In 1873, Vale was the Anti-Monopoly candidate for governor of Iowa. Vale died February 17, 1875. His son, B.R. Vale, served in the Iowa Senate from 1888-1896

GPS to LRM: Integration of Spatial Point Features with Linear Referencing Methods, 2001

Global positioning systems (GPS) offer a cost-effective and efficient method to input and update transportation data. The spatial location of objects provided by GPS is easily integrated into geographic information systems (GIS). The storage, manipulation, and analysis of spatial data are also relatively simple in a GIS. However, many data storage and reporting methods at transportation agencies rely on linear referencing methods (LRMs); consequently, GPS data must be able to link with linear referencing. Unfortunately, the two systems are fundamentally incompatible in the way data are collected, integrated, and manipulated. In order for the spatial data collected using GPS to be integrated into a linear referencing system or shared among LRMs, a number of issues need to be addressed. This report documents and evaluates several of those issues and offers recommendations. In order to evaluate the issues associated with integrating GPS data with a LRM, a pilot study was created. To perform the pilot study, point features, a linear datum, and a spatial representation of a LRM were created for six test roadway segments that were located within the boundaries of the pilot study conducted by the Iowa Department of Transportation linear referencing system project team. Various issues in integrating point features with a LRM or between LRMs are discussed and recommendations provided. The accuracy of the GPS is discussed, including issues such as point features mapping to the wrong segment. Another topic is the loss of spatial information that occurs when a three-dimensional or two-dimensional spatial point feature is converted to a one-dimensional representation on a LRM. Recommendations such as storing point features as spatial objects if necessary or preserving information such as coordinates and elevation are suggested. The lack of spatial accuracy characteristic of most cartography, on which LRM are often based, is another topic discussed. The associated issues include linear and horizontal offset error. The final topic discussed is some of the issues in transferring point feature data between LRMs.