The mathematical concepts and equations described and used in formulating the global spatial data model are all in the public domain. The phrase “global spatial data model (GSDM)” is generic. The term “BURKORD” has been trademarked (1) as the name of a software package that performs 3-D coordinate geometry and error propagation computations as described in this topic, and (2) as the name of a 3D database used by the BURKORD software. The end user is free to use the term “BURKORDTM” as applied to the underlying database or to software obtained from Global COGO, Inc. However, anyone offering a product or services to others whose value relies upon or is enhanced by reference to or use of the BURKORD trademark will be expected to pay an appropriate licensing fee. Inquiries related to using the term “BURKORD™” should be directed to Global COGO, Inc., P.O. Box 3162, Las Cruces, NM 88003.
Summary
The GSDM gives each user both control and responsibility. If good or bad information is used inappropriately, unreliable answers can be obtained. However, the opposite case is the important one. The GSDM defines a model and computational environment that can be used to manage spatial data efficiently. Each user has the option of establishing criteria that must be met before spatial data can be used for a given purpose. The concept of meta data is important in establishing and preserving the credibility of spatial data, but standard deviation (in any or all components) is a very efficient method for evaluating the quality of spatial data. Once the X/Y/Z position of a point is defined along with its variance-covariance matrix, the spatial data can be exchanged in a very compact format. The same solid geometry and error propagation equations for using such shared spatial data are equally applicable worldwide, and the mathematical procedures are already proven and individually implemented. Using the GSDM is primarily a matter of choosing to do so.
