Build the geography first.
A useful constituency intelligence system starts by defining the geographic hierarchy and the source used for each mapping.
Add electoral history.
Results, turnout and margins can then be organised by election cycle, with changes in boundaries or reporting definitions clearly noted.
Add public context.
Publicly available demographic, infrastructure and issue-related information can provide context, provided the source period and limitations remain visible.
Keep operational inputs separate.
Authorised field reports can be connected to the same geography, but they should remain distinguishable from official public statistics. This makes the final dashboard easier to audit and update.