Transferring z-values from the vertices to a field
If you want to transfer the z-value for the selected records only, enable the Transfer Z-value of selected shapes only check box.
Click Shape to attribute.
In the Destination field list, click the field that you want to receive the z-value.
If you want to create a new field in the Attribute Manager, click New Field. A default label called Z-value is displayed in the Destination field list. You can rename the label to one of your choice. The field properties, except the data type, are set by default. You set the data type in step 4. To modify the field properties, see Setting the field definitions.
If you create a new field for the z-value, the Type list becomes available. In the Type list, click one of the following data types:
Integer: defines the field for positive or negative whole numbers
Float: defines the field for single-precision real numbers
Double: defines the field for double-precision real numbers
In the Z-value aggregation list, click the method that you want to use to combine the z-values from the vertices into an attribute for the shape. Click one of the following methods:
First: for each selected shape it uses the z-value from the first vertex as the attribute.
Last: for each selected shape it uses the z-value from the last vertex as the attribute.
Sum: for each selected shape it calculates the sum of the Z-values from the vertices and uses that value as the attribute.
Mean: for each selected shape it calculates the average z-value from the vertices and uses that value as the attribute. The average is obtained by adding values from the vertices and dividing that value by the number of vertices used in the sum.
Minimum: for each selected shape it uses the lowest z-value from the vertices as the attribute.
Maximum: for each selected shape it uses the highest z-value from the vertices as the attribute.
Mode: for each selected shape it calculates the z-value that occurs the most frequently among the vertices and uses that value as the attribute.
Median: for each selected shape it ranks the Z-values from the vertices in numerical order. The median is the middle value and it uses that value as the attribute.
Standard Deviation: for each selected shape it measures the variation in the distribution of Z-values, which is calculated from square root of the variance, and uses that value as the attribute.