The data quality matters. The proposal in the Johnwhelan ‘s diary is to run duplicated building script and JOSM validator when an area is finished on the whole area. The rest of his diary deals with how to get the area’s border geometry and the OpenStreetMap data into the JOSM.
Here are the steps to download the area’s geometry and the OpenStreetMap data when using the damn project:
Load the area’s geometry by navigating to the area in the JOSM
damnplugin, then click Get area geometry button.
It’s also possible to navigate to the area in the mappy (web) client, right click on arbitrary square and download area geojson, and open the downloaded file in the JOSM. It’s good idea to right click on the created
area.geojsonlayer and Convert to GPX layer to make it read-only, which is the same result as when using the JOSM
Download the data from Overpass API, which is the second tab on Download map data … dialog. You can get the Overpass query by navigating to the area in the mappy (web) client, right click on arbitrary square and area overpass query. Then copy the query to the JOSM’s Download from Overpass API, Overpass query: field and click Download. Be sure you have enough RAM for big areas.
That’s all. It’s kind of fun I’m writing this diary just few days after my damn project developer’s “annual report”, but I didn’t make it sooner.