Error: TAG THRESHOLD=3 is ignored
When adding a TIFF image to a View, the following error occurs:
TAG THRESHOLD=3 is ignored
The image is true black and white and has been saved as a gray-tone or color image.
TIFF images have a THRESHOLDING tag that lets you treat a black and white image as shades of gray through dithering and halftones. If the image is true black and white, the color and grey-tone threshold settings are ignored by ArcView.
Solution or Workaround
Save the image as true black and white. This will set the THRESHOLD of the image equal to 1.
The error is a non-fatal error and occurs every time ArcView needs to
re-read the image.