Command center for municipal demands

After the module has been selected, a form "selection criteria" will open. This form looks similar for all modules, and functions as a "command center" to initiate the following operations:

• Spatial selection of demand centers (uses a separate form)
  
  Note:  Inverse Selection  will only be applicable after the demand centers of the first data selection have been processed.
• Entry of reference year (absolutely necessary, if this field is empty you can not proceed entering demand-related data)
  Note: You are prevented from entering years for which there either no population figures (i.e. before 1994 or currently after 1999) or no billing data stored.
• Optional reduction of the results from spatial selection with the following query criteria:
  
  individual ID,
  
  type of settlement (see also table SETT_TYPES for full reference),
  
  population number (in the reference year) and
  
  absolute amount of water use (in the reference year) .
  
  This helps to distinguish different types of demand centers, as they may have a different development.
• Alternatively, you can load the demand centers and the reference year from a previous session .
• Export data from the reference year to Excel .
• Export data from reference year to STP .

The screenshot below shows the form after spatial selection and entry of a reference year. Like most other forms, also this form possesses a number of controls. Move with the cursor over the image. If the cursor changes from arrow to a hand, you can click to find detailed explanation about the controls.

The listfield shows the selected demand centers with the following attributes:

• SETT_ID: Settlement ID
• TYPE: code for the type of settlement acc. table SETT_TYPES
• P_CEN: Population in the census year (usually 1994)
• P_REF: Population in the reference year as calculated from DOS growth figures and stored in table STP_POPULATION.
  This is the figure on which both the per-capita consumption estimates of the reference year and the development of future population will be based.
• SETT_NAME: name of the demand centers (not all demand centers are settlements).