{'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 10 vis, time last 1.853 s.

Cost:8.770

Cost:8.770

Cost:8.780

Cost:8.780

Cost:8.780

Cost:17.530

Cost:17.530

Cost:17.540

Cost:17.540

Cost:17.540