Provided is a method for obtaining a position of an object. A slide which carries at least one object and has reticle marks arranged at positions which form substantially a right angle, is positioned in a slide holder of a first imaging system. A first coordinate space of the imaging system is defined, and coordinates of the reticle marks in the first coordinate space are designated. A second coordinate space of a second imaging system is defined, and the coordinates of the reticle marks in the second coordinate space is designated. Using the designated coordinates of the reticle marks of the first coordinate space, the coordinate conversion parameters are computed. Thereafter, coordinates of at least one object in the first coordinate space are designated, and the first coordinate space coordinates of the object are converted into unique coordinates in a second coordinate space, using the coordinate conversion parameters.