{'field': 'Lat', 'type': 'quantitative'}
{'field': 'Long', 'type': 'quantitative'}
{'field': 'region', 'type': 'nominal'}
{'field': 'USMapID', 'type': 'nominal'}
{'field': 'death', 'type': 'quantitative'}
{'field': 'confirmed', 'type': 'quantitative'}
{'field': 'date', 'type': 'temporal'}
Generate 15 vis, time last 1.698 s.
Cost:17.540
Cost:17.540
Cost:17.540
Cost:17.540
Cost:18.180
Cost:18.190
Cost:18.190
Cost:18.200
Cost:18.200
Cost:26.220
Cost:26.220
Cost:26.220
Cost:26.220
Cost:26.220
Cost:26.220