The nonsurveyor's definitive land survey sourcebook—now extensively updated Over the last several decades, the Internet has allowed individuals with a non-technical background to assume more control of land surveys. But without a clear understanding of how to accurately use land survey data, and faced with the challenges of communicating specific requirements to a professional land surveyor, conflicts often arise that lead to litigation. A Guide to Understanding Land Surveys bridges the ever-expanding communication gap between the users of land boundary information and professional land surveyors. This indispensable guide clearly explains the functions and procedures required in every survey (routine or otherwise), and the role of a surveyor in their investigation and re-establishment. It is a must-have resource for title attorneys, paralegals, realtors, government agents, and others who rely on the information gathered and presented by land surveys. Written in nontechnical language and supported by numerous line drawings, A Guide to Understanding Land Surveys not only helps readers gain a strong familiarity with a survey, plat, or land description, but enables them to accurately evaluate it, detect any inadequacies, and make the proper adjustments to obtain approval. The Third Edition of A Guide to Understanding Land Surveys has been expanded with thirty percent new material and is fully updated to reflect the latest practice guidelines and technology, including the use of GPS and GIS in land boundary re-establishment. Also included is important new material on how technology should be interpreted in assessing the quality and accuracy of a land survey.

A revised and expanded new edition of the definitive English work on map projections. The revisions take into account the huge advances in geometrical geodesy which have occurred since the early years of satellite geodesy. The detailed configuration of the geoid resulting from the GEOS and SEASAT altimetry measurements are now taken into consideration. Additionally, the chapter on computation of map projections is updated bearing in mind the availability of pocket calculators and microcomputers. Analytical derivation of some map projections including examples of pseudocylindrical and polyconic projections is also covered. Work undertaken in the USA and USSR on the creation of suitable map projections obtained through numerical analysis has been included. The book concludes with a chapter on the abuse and misrepresentation of map projections. An invaluable reference source for professional cartographers and all those interested in the fundamental problems of mapping the Earth.

Coordinates are integral building tools for GIS, cartography, surveying and are vital to the many applications we use today such as smart phones, car navigation systems and driverless cars. Basic GIS Coordinates, Third Edition grants readers with a solid understanding of coordinates and coordinate systems and how they operate as well as valuable insight into what causes them to malfunction. This practical and comprehensive guide lays out the foundation of a coordinate system and the implications behind building it as it elaborates on heights, two coordinate systems, and the rectangular system.The previous editions described horizontal and vertical datums such as the North American Datum 1983 (NAD 83) and the North American Vertical Datum 1988 (NAVD 88). Both will be replaced in 2022 or thereabouts. The National Geodetic Survey (NGS) plans to replace NAD83 with a new semi-dynamic terrestrial reference frame for North America and a new vertical datum will replace NAVD88. The foundation of the new vertical datum will be a temporally tracked gravimetric geoid. The interim period is intended to smooth the transition to the new paradigm and this new edition explores the changes and provides assistance in understanding them.