A method of laying out a grid of points across an area comprises designating a starting reference point; projecting with the laser beam a first reference line intersecting the first reference point and extending in a first direction relative to the area; designating the set of first line reference points...http://www.google.es/patents/US8006394?utm_source=gb-gplus-sharePatente US8006394 - Apparatus, method and system of precise identification of multiple points distributed throughout an area
Apparatus, method and system of precise identification of multiple points ...
