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).
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