Calibrating the Bitmap Coordinates

The calibration options determine how the program will convert bitmap pixels (picture elements) to global map coordinates. Choose one of the methods:

Manually Define Min/Max: Choose this option to type in the coordinates that represent the opposite corners of the image. This method assumes that the image is oriented exactly east/west & north/south.
- X-Minimum: Type in the X (Easting) coordinate to be represented along the west (left) edge of the image.
- X-Maximum: Type in the X (Easting) coordinate to be represented along the east (right) edge of the image.
- Y-Minimum: Enter the Y (Northing) coordinate to be represented along the south (lower) edge of the image.
- Y-Maximum: Enter the Y (Northing) coordinate to be represented along the north (upper) edge of the image.
Min/Max Defined within Text File: Choose this option if you have the minimum and maximum coordinates listed in an external text file. Browse for the name of this file.
3-Point Calibration: Choose this option if you will enter three known coordinates and then click on these points in the map. This method will allow for some tilt relative to a perfectly east/west & north/south aligned image. When you are done entering the X and Y coordinates for the three points, the program will prompt you to click on the image where those three calibration points reside.
- Point 1: Type in the X and Y coordinates for the first known point on the image.
- Point 2: Type in the X and Y coordinates for the second known point on the image.
- Point 3: Enter the X and Y coordinates for the third known point on the image.