The Surficial Aquifer System Response theme grid is the relative vulnerability map for the Surficial Aquifer System. It was calculated using the ArcSDM extension and applying the weights of evidence method. The total number of unique conditions, number of training points per unique condition, evidential theme generalizations and posterior probability are contained in the table. A relative vulnerability class field is also in the table so that the grid can be symbolized based on FAVA vulnerability zones.
The development of a Surfcial Aquifer System relative vulnerability map
publication date
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Gunter Building MS #720
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Florida Geological Survey
The Surficial Aquifer System Response theme grid is the relative vulnerability map for the Surficial Aquifer System. It was calculated using the ArcSDM extension and applying the weights of evidence method. An analysis extent (study area), training point theme (sas_training_pts.shp), and modeling method (weights of evidence) are selected in the set analysis parameters. Weights are then calculated on each evidential theme and then the themes are generalized (into binary patterens). A generalization of 1 represents "more vulnerable" areas, 2 represents "less vulnerable areas and -99 represents missing data. A response theme is then calculated based on the association between training points and evidential themes. The total number of unique conditions, number of training points per unique condition, evidential theme generalizations and posterior probability are contained in the table. A relative vulnerability class field is also in the table so that the grid can be symbolized based on FAVA vulnerability zones.
Gunter Building MS #720
903 W. Tennessee St.
Dataset copied.
Dataset copied.
Dataset copied.
Dataset copied.
Dataset copied.
Uncertainty due to missing data (standard deviation)
ESRI
Internal feature number.
ESRI
Combined uncertainty due to weights and missing data (standard deviation)
ESRI
Standard deviation of weights
Number of unique conditions based on evidential theme generalization
number of cells making up each unique conition
Generalization of SAS depth to water evidential theme
Generalization of soil permeability evidential theme
Generalization of proximity to closed topographic depressions evidential theme
Area (sq. meter)
Number of training points per unique condition
Level of significance in model results (Posterior probability/ Total Uncertainty)
Relative vulnerability name
Relative vulnerability class
The probability that a unit cell contains a training point after consideration of the evidential themes.
Sum of weights for each evidential theme per unique condition
Gunter Building MS #720
903 W. Tennessee St.
Gunter Building MS #720
903 W. Tennessee St.