{'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 18 vis, time last 1.699 s.

Cost:63.700

Cost:63.700

Cost:63.735

Cost:63.735

Cost:65.637

Cost:65.637

Cost:65.660

Cost:65.660

Cost:65.870

Cost:65.870

Cost:65.905

Cost:65.905

Cost:126.700

Cost:127.330

Cost:131.040

Cost:131.040

Cost:131.670

Cost:131.670