{'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 46 vis, time last 1.758 s.

Cost:17.540

Cost:17.540

Cost:17.540

Cost:17.540

Cost:17.540

Cost:17.540

Cost:18.160

Cost:18.160

Cost:18.180

Cost:18.190

Cost:18.800

Cost:18.800

Cost:18.810

Cost:18.810

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.220

Cost:26.240

Cost:26.240

Cost:26.240

Cost:26.240

Cost:26.840

Cost:26.840

Cost:26.860

Cost:26.860

Cost:27.490

Cost:27.490

Cost:27.490

Cost:27.490

Cost:27.510

Cost:27.510

Cost:27.530

Cost:27.530

Cost:27.530

Cost:27.530

Cost:34.920

Cost:34.920

Cost:36.870

Cost:36.870

Cost:36.880

Cost:36.880