The Floridan Aquifer System Response layer is the relative vulnerability map for the Floridan Aquifer System. It was calculated using the ArcSDM extension and applying the weights of evidence and logistical regression 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.
Development of a relative vulnerability map for the Floridan Aquifer System
publication date
DISCLAIMER: This geologic data was developed by the Florida Department of Environmental Protection (FDEP) - Florida Geological Survey (FGS) to carry out agency responsibilities related to management, protection, and development of Florida's natural resources. Although efforts have been made to make the information accurate and useful, the FDEP/FGS assumes no responsibility for errors in the information and does not guarantee that the data are free from errors or inaccuracies. Similarly FDEP/FGS assumes no responsibility for the consequences of inappropriate uses or interpretations of the data. As such, these digital data are distributed on "as is" basis and the user assumes all risk as to their quality, the results obtained from their use, and the performance of the data. FDEP/FGS bears no responsibility to inform users of any subsequent changes made to this data. Anyone using this data is advised that precision implied by the data may far exceed actual precision. Comments on this data are invited and FDEP/FGS would appreciate that documented errors be brought to staff attention. The development of these data sets represents a major investment of staff time and effort. As a professional responsibility, we expect that the FDEP/FGS will receive proper credit when you utilize these data sets. Further, since part of this data was developed and collected with U.S. Government or State of Florida funding, no proprietary rights may be attached to it in whole or in part, nor may it be sold to the U.S. Government or the Florida State Government as part of any procurement of products or services.
Gunter Building MS #720
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Florida Geological Survey
The Floridan Aquifer Response theme grid is the relative vulnerability map for the Floridan Aquifer System. It was calculated using the ArcSDM extension and applying the weights of evidence and logistic regression methods. An analysis extent (study area), training point theme (fas_training_pts.shp), and modeling method (weights of evidence, logistic regression) are selected in the set analysis parameters. Weights are then calculated on each evidential theme and then the themes are generalized (into binary patterens, ias_thk is the exception with three classes). 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 logistic regression 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.
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Dataset copied.
Dataset copied.
Dataset copied.
Metadata imported.
Dataset copied.
Dataset copied.
Logistic regression standard deviation
ESRI
Internal feature number.
ESRI
Number of unique conditions
Number of cells per unique condition
Area (sq meters)
Number of training points per unique condition
Vulnerability class
Generalization of soil permeability evidential theme
Generalization of IAS thickness evidential theme
Generalization of proximity to effective karst evidential theme
Generalization of hydraulic head difference evidential theme
Logistic regression posterior probability - The probability that a unit cell contains a training point after considering the evidential themes.
Gunter Building MS #720
903 W. Tennessee St.
Gunter Building MS #720
903 W. Tennessee St.