HEC-DSSVue (Hydrologic Engineering Center Data Storage System Visual Utility Engine) is a graphical user interface software for viewing, editing, and manipulating data in HEC-DSS database files. With HEC-DSSVue, data may be plotted, tabulated, edited, and manipulated with over fifty mathematical functions. Along with these functions, HEC-DSSVue provides several utility functions, such as entering data sets into a database, renaming data set names, copying data sets to other HEC-DSS database files, and deleting data sets.

In HEC-FIA, HEC-DSSVue is used mainly as a viewing tool for HEC-DSS data. This Appendix reviews some of the general functions in HEC-DSSVue. For further detail, see the HEC-DSSVue User's Manual.

HEC-DSS is a database system designed to efficiently store and retrieve typically sequential, scientific data. Such data types include, but are not limited to, time series data, curve data, spatial-oriented gridded data, textual data (such as this manual), and others. The system facilitates users and application programs retrieval and storage of data.

The data are arranged into blocks. For example, one year of daily-interval data is stored in a single record in the HEC-DSS. Each record is given a unique name called a pathname. The pathname is formulated in a way that makes it easy to group related data together. Software from HEC has the ability to read from and write to HEC-DSS. This capability facilitates data exchange among applications. For example, HEC-ResSim can be used to generate the time series input for HEC-FIA.