[Talk-us] Fresno castradal imports

[Mike N]

On 5/5/2012 1:23 AM, Gregory Arenius wrote:
> The OSM model isn't everything in a separate layer, it is
>             everything altogether.  What makes plots unique in this
> regard?  Why do we want them separate?

   If you compare land use to TIGER - the base road network from TIGER 
is continually being corrected, improved and updated.   Land use is 
typically never updated once it has been brought into OSM.  Most of the 
changes are incidental as mappers update other objects such as roads, 
buildings, and power lines.  Now when there is a large change, such as 
from an expanding city - how do you update the OSM data?   Delete any 
changes that have been made and replace them with the new data? 
Contrast that to keeping the data separate: updating is as simple as 
replacing a group of files.   (But of course the separate database is 
hypothetical at this point).