Extract groups define the type and source of data that will be copied when an extract is running. Extract groups can be created for the following data sources:
The Extract Groups box within the Extract Editor lists the defined extract groups for a watershed. From the Extract Groups box you can: create an extract group; delete an extract group; rename an extract group; make a copy of an extract group; select which extract groups will run by default; and determine the order in which extract groups will run. In addition, you can color code the extract groups that will run by default.
Extract groups are run in the order they are displayed in the Extract Groups box. If you run more than one group during the extract process with multiple data sets that are mapped to the same record in the forecast.dss file, the last extract group will replace all data extracted previously within that record.
Time series data can be extracted from an HEC-DSS file, from the Oracle database, or from CWMS-Data-API. Examples of time series data you may need to add to an extract list are:
observed gage data (stage and flow) from a gage within the watershed
observed outflow data for a USACE reservoir project
forecasted river stages from the National Weather Service
Gridded Data
Gridded data can be extracted from an HEC-DSS file or from Cumulus. Examples of gridded data you may need to add to an extract list are:
