[Talk-us-sfbay] Proposed import of San Francisco addresses

[Jack Pearson]

On 2/9/23 13:50, Belov, Charles wrote:
> I am proposing importing all San Francisco addresses with their 
> corresponding latitude and longitude, as served by DataSF at Addresses - 
> Enterprise Addressing System as open data. Specifically, I am seeking to import the columns Address, Latitude, and Longitude. This is because not all San Francisco addresses are in OpenStreetMap, leading to unsuccessful matches when trying to retrieve missing addresses.
> 
> My concern is that many San Francisco addresses are already in 
> OpenStreetMap, and there may be a conflict as to the Latitude and 
> Longitude between those existing addresses and the San Francisco address 
> data, leading to duplicate and mismatched data.

My main comment is hooray! I love that people at the City care about
OpenStreetMap.


On 2/9/23 14:33, Tyler Brown Cifu Shuster wrote> The most important thing to note is that addresses should be applied to
> buildings and not as points.

Be careful when you do this automatically. Address nodes are often beside the
building they describe rather than inside the building. But when you add any
sort of tolerance for that error you can introduce a lot of false positives. If
there are 2 physical buildings A and B, and only B has an address, and only A
has been traced into OpenStreetMap, and the B address node has just a
little error, then the address node will bind to the wrong building.


I've made this mistake before and affected many buldings, which is why I'm
commenting.


Best,

Jack