Authors: Margaret M. Maher ISBN-13: 9781589482494, ISBN-10: 1589482492 Format: Paperback Publisher: Esri Press Date Published: June 2010 Edition: New Edition Margaret M. Maher specializes in projections and data conversion in support services at ESRI. She holds a Bachelor of Science degree, in a specialized major, combining studies in GIS and geology from California State University, Sacramento. Maher has written numerous articles on projections and data conversion topics for the ESRI Support Services Knowledge Base. She currently lives in Cherry Valley, California with her husband George and their daughter Julie. Data misalignment is one of the biggest issues faced by GIS users. A member of the ESRI support services team, author, Margaret Maher has closed more than 12,000 incidents relating to projections and data conversion. Lining Up Data in ArcGIS is a practical guide to solving these problems, based on Maher’s decade of experience helping GIS users find resolution. This book presents techniques to identify data projections and create custom projections to align data. Formatted for practical use, each chapter can stand alone, addressing specific issues related to working with coordinate systems. Lining Up Data in ArcGIS: A Guide to Map Projections is a handbook that will benefit new and skilled GIS users alike. Example of datum offset between NAD 1927 and NAD 1983 datums in a geographic coordinate system (GCS) 14 Example in which data with the unknown coordinate system is in a GCS, and reference data is in a projected coordinate system 21 Source.