EC: Contour__Grid transformation

The Transformation command contains several options that modify the X and Y map coordinates of grid nodes within the grid file. It does not alter the M values.

1. Click [Contour] | [Transformation] command, pop up [Transformation].

2. Transformation type

   (1) Offset

         The Offset option adds or subtracts a number from the X and Y dimensions. Specify the Offset option, and

         specify the amount of the offset in the X Offset and Y Offset boxes in positive or negative units.

   (2) Scale

         The Scale option multiplies the X and Y ranges by a factor. Specify the Scale option, and specify the

         scaling factors in the X Scale and Y Scale boxes displayed. The scaling origin is the lower left corner of the

         grid, so only the xMax and yMax values are changed.

   (3) Rotate

         The Rotate option rotates a grid in multiples of 90 degrees (0, 90, 180, 270). Select the Rotate option, and

         specify the rotation angle. The origin of the map remains in the lower left, and the axes continue to

         increase in the same direction, with the X axis increasing to the right, and the Y axis increasing upwards.

   (4) Mirror X

        The Mirror X option creates a new grid file with the order of the grid nodes reversed in the X direction. The

        output grid file uses the same minimum and maximum X and Y coordinates as the input grid file. The origin

        of the grid remains in the lower left corner, with X increasing to the right and Y increasing upward. The Y

        order remains unchanged.

   (5) Mirror Y

        The Mirror Y option creates a new grid file with the order of the grid nodes reversed in the Y direction. The

        output grid file uses the same minimum and maximum X and Y coordinates as the input grid file. The origin

        of the grid remains in the lower left corner, with X increasing to the right and Y increasing upward. The X

        order remains unchanged.