Series.GeoMappingLevel (Excel)
Specifies the geography mapping level for the specified series within the chart group. Possible return values are xlGeoMappingLevelAutomatic - Use highest resolution mapping level, xlGeoMappingLevelCountryRegion - Map by country, xlGeoMappingLevelCountryRegionList - Map by region (group of countries), xlGeoMappingLevelCounty - Map by county, xlGeoMappingLevelDataOnly - Only map regions with data, xlGeoMappingLevelPostalCode - Map by postcode, xlGeoMappingLevelState - Map by state, xlGeoMappingLevelWorld - Map the whole world.
ActiveChart.FullSeriesCollection(1).GeoMappingLevel = xlGeoMappingLevelAutomatic