GDI_LIVE_DGN_ERASE_BEFORE_REFRESH

When defined, will cause OpenCities Map to erase all spatial features before making the query. This will ensure that any features deleted in the database are also deleted in the Live DGN. Default is not defined.

GDI_LIVE_DGN_MIN_REFRESH_SECONDS (only valid for referenced Live DGN)

Minimum number of seconds between Live DGN refreshes (defaults to 60)

GDI_SUPPRESS_LIVE_DGN_AUTO_REFRESH (only affects referenced Live DGN)

When defined turns off Live DGN auto-refresh. Default is not defined.

GDI_PROMPT_FOR_REFRESH (does not affect referenced Live DGN)

When defined, you will be prompted to refresh a Live DGN rather than it happening automatically. Default is not defined.