[Imports] Import of Flemish Government data (building footprints and addresses)

[Frederik Ramm]

Hi,

On 10/28/18 18:46, Pieter Vander Vennet wrote:
> By having the integrationprocess in place, we can make sure that the
> data is properly integrated, properly attributed and backreferenced for
> future updates. 

I am always skeptical of imports trying to uphold links to an external
database, and would recommend *not* keeping any IDs from the source
object in OSM.

Keeping a link to the source signals to the mapper "don't touch this,
it's official data" or "your edits can be overwritten by a future import".

More often than not, importers keep an external ID because they think
"it might be useful later". If you want to keep an ID then you ought to
determine *now* if and how you want to use that, and give guidance to
mappers: If you split a building that has such an ID what should you do
- delete the ID from both, keep on both, or...? If you delete a building
that has such an ID, how will you ensure it isn't brought in again
through a later "update import"? Etc.

I think taht because any later attempt to update OSM data from the
government data source will have to analyse existing OSM data *anyway*
and will not be able to rely on the external IDs, it's not worth
importing them in the first place.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"