Coordinate transformation parameter calculation method, and the coordinate conversion parameter calculating unit and coordinate conversion parameter calculation program using such a method

摘要

The present invention grid lines to provide a coordinate transformation parameter calculation method for converting a geodetic coordinate system and the image coordinate system of the map does not appear. Coordinate transformation parameter calculation method according to the present invention relates to a computer 1, the image coordinate system coordinates and geodetic coordinate system X-coordinate values ​​entered in one of three X-coordinate grid line on the map is read a straight line connecting the two points out, a straight line connecting two points of the input image coordinate system coordinate values ​​of any three of the Y-coordinate grid line, and a geodetic coordinate system Y-coordinate value is read on the map The first is calculated using the intersection of the image coordinate system coordinates of the second point and the third point and a geodetic coordinate system coordinate values ​​calculated, the calculated first point, second point and third point Use the image coordinate system coordinates and geodetic coordinate system coordinate values, and a step of calculating a coordinate transformation parameter between the image coordinate system and the geodetic coordinate system. [Selection Figure] Figure 4