This image shows the difference between the 7.5' data and the 3 arc-second data for each cell in the study area.
White regions have very low or zero difference.
A regular pattern of alternating positive and negative stripes along the southern slopes of the Santa Ynez mountains indicates that the 3 arc-second data is not capturing the texture of the canyons evident in the 7.5' data. Statistical analysis indicates a clear relationship between magnitude of slope and magnitude of error. This particular difference map was created to assist the researchers in exploratory data analysis only. None of the elevation values from the study area were used to develop the parameters for the error model. .