Redlands, Calif.-based Esri Press has released the second edition of "Lining Up Data in ArcGIS: A Guide to Map Projections."

It is a troubleshooting reference for geographic information system (GIS) users who work with coordinate systems. Complete with full-color maps and diagrams, this book presents practical techniques to help readers identify data projections, create custom projections to align data and resolve common issues.

The second edition is compatible with ArcGIS 10.1 and includes sections on using CAD data and web Mercator projection. It shows you how to resolve alignment issues reflected in common error messages; how and when to perform geographic transformations and which transformation to use; how to decide which map projection to use; what the parameters in a projection file mean and what they do; and how to add x,y data to your map.

“I have found that data misalignment is one of the biggest issues faced by GIS users,” says author Margaret M. Maher, a specialist in projections and data conversion in Esri’s support services department. “While understanding coordinate systems can be a challenge, this book is filled with practical techniques that will demystify the process."

The book costs $24.95 and is available on the Esri Press website and at other online retailers.