Trace under-construction highway using 2019-01-23 Sentinel-2 imagery.

Extend under-construction highway using 2019-01-23 Sentinel-2 imagery.

Extend under-construction highway using 2019-01-23 Sentinel-2 imagery.

Better align under-construction highway using 2019-01-23 Sentinel-2 imagery, and mark as primary.

Properly connect under-construction highway with existing one using 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace highway from DigitalGlobe and Bing imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Trace under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Begin tracing under-construction motorway from 2019-01-23 Sentinel-2 imagery.

Use tags to mark as under construction rather than just the name.

better align highway with GPS traces taken post-realignment

Add address and internet access.

Divide Daxing airport into 2 disjoint pieces based on 2019-01-23 Sentinel-2 imagery.

Refine airport boundary based on 2019-01-23 Sentinel-2 imagery.