Georeference Image

 

 

Georeference Image

If an image is needed for use as a basemap and no world coordinate file is available, the file need to be georeferenced so that it will appear in a coordinate system consistent with other graphic images.  Georeferencing is accomplished in EnviroInsite by selection of two points on the map for which coordinates are known.

Here are the instructions for inserting and then georeferencing a map image.

1. Insert – Image

2.Select your image file (may be jpg, png, tif, or bmp) and

3.Click the Open button

4.Double-click on the image to open the image property dialog box

5.Click on the Georeference button (at the bottom-left)

6.Use the mouse and click on two points (make sure that you know the world-coordinates of these points)

7.Enter the coordinates of the points in the New Coordinates section of the dialog box

8.Click the OK button - (This will return you to the image properties dialog box.)

9.Click OK

 

You should now see the image in the correct location and scale.  If it doesn't look correct then you may have typed the coordinates incorrectly or enter them in the wrong order.   This operation can be repeated if it does not appear to have been done correctly.  The most common error in georeferencing occurs due to imprecision in selection of the known points on the bitmap image.