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ArcPy and ArcGIS -


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About the Author

Silas Toms is a certified GIS Professional and author of the first edition of ArcPy and ArcGIS. President and founder of Loki Intelligent Corporation, a location information firm located in San Francisco, California, Silas is an expert in real-time geographic information systems and analysis automation. Along with Dara O'beirne and Arini Geographics, Silas developed the real-time common operational picture used at Super Bowl 50 and all other events at Levi's Stadium in Santa Clara, Ca. This dynamic system was recognized by the White House and by Esri President Jack Dangermond as a unique and powerful application of GIS, allowing federal, state, and local government to coordinate and communicate in real-time, for the first time ever. As President of Loki Intelligent, Silas is focused on unique applications of GIS that will power the future of location information. The sheer amount of data collected through sensors and mobile reporting demands automation and data processing improvements to turn the raw input into location intelligence. Silas believes that correct application of geospatial analysis, web mapping, and mobile data collection will improve the decision-making processes within government and business. Loki is location information, and information is power. Dara O'Beirne is a certified GIS Professional (GISP) with over 10 years of GIS and Python experience. He also has earned both his Bachelors and Masters of Art in Geography from San Francisco State University. Dara is currently a GIS Analyst working at the City of Sacramento's Department of Utilities. Before joining the City of Sacramento, Dara was a GIS Analyst for Arini Geographics at the City of Santa Clara in California. While in Santa Clara he worked on converting the utility network AutoCAD data to ESRI's GIS Local Government Information Model. He was also an integral part of the GIS Team, which included Silas Toms, Cyrus Hiatt, Sherie Tan and Gabriel Paun, that worked on a developing a web mapping application used during each event at the new Levi's Stadium, including Super Bowl 50. Dara's professional experience also includes working with Towill Inc., a GIS and Land Surveying company in Northern California. At Towill he played a central role in developing and implementing procedures related to the collection and analysis of LiDAR data for environmental and engineering applications. Prior to Towill, Mr. O'Beirne gained his professional GIS experience working for the Golden Gate National Recreation Area managed by the National Park Service, one of the largest urban park systems in the world, which includes National treasures such as Alcatraz, Muir Woods and the Marin Headlands. His Master's thesis examined the error associated with measuring tree heights in an urban environment with both traditional field methods and airborne LiDAR data. His varied experience in the geoprofessional world has lead Dara to believe that GIS has and will continue to play a central role in both personal and business decisions made everyday, especially as the world becomes more interconnected, mobile and location aware.

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