Length Ratio computes the ratio between the distance from the current IJK coordinate to the index+1 point and the distance from the current IJK to the index-1 point in the computational direction chosen. The larger of the two distances is always divided into the smaller, so all values range between 0 and 1. Furthermore, this function will be calculated across entity boundaries as long as the adjacent entities are loaded into Examine as well. Otherwise, the value at boundaries will be set to 1.

Since this function is directional along computational coordinates, adjacent entities must be computationally aligned in order for reference surfaces to exhibit a continuous variation in the function across entity boundaries. Nonaligned entities will display a discontinuity across their common boundary.