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US 7,558,677 B2Granted
High accuracy survey-grade GIS system
AssigneeR.A. Smith National, Inc.
InventorRobert S. Jones
Life of this patent
Estimating the term…
Abstract
A method of coordinating surveys of different origins and which may be projected into different coordinate systems. The method provides a translation and rotation of the surveys to be coordinated without disturbing the internal geometry of each survey. A geographic information system including a procedure for coordinating surveys of different origins and/or which surveys which projected in different coordinate systems.
Claims8
A geographic information system comprising:
- means for transforming surveys of different parcels of land into the same local grid coordinate system by associating points in each survey with points that represent the same physical location on earth in the local grid coordinate system, wherein the association of points representing the same physical points on the surface of the earth but in different coordinate systems defines a translation and a rotation to be applied to each survey in order to transform each into the same local grid coordinate system, and wherein the local grid coordinate system is defined by an ellipsoid and map projection that reduces the difference between grid distances and ground distances to an insignificant amount over the area encompassing the surveys to be transformed.
Dependencies are inferred from the claim text.