NSW Data has now discontinued the reporting of COVID-19 case location data.
This visualisation, now outdated, shows the number of NSW COVID-19 cases reported within the last 2 weeks, by postcode.
https://digitalpoetry.github.io/covid-heatmap-nsw/
COVID-19 case data sourced from Data.NSW. Geographic boundaries from digitalpoetry/nsw-suburb-geojson.
NSW Health publishes a similar heatmap of reported cases, by LGA.