[Talk-us] MassGIS Building Import - process

[Paul Norman]

> From: Greg Troxel [mailto:gdt at ir.bbn.com]
> Subject: Re: [Talk-us] MassGIS Building Import - process
> 
> 
> Jeff Meyer <jeff at gwhat.org> writes:
> 
> > Paul - I've added a few comments and questions about changeset size
> > and revert policies on the Import Guidelines & Plan Outline wiki
> pages.
> >
> > Are there any recommended changeset size limits and/or revert plan
> > practices?
> 
> Tools support for reverting is a fair point.  But, I'd argue that it's a
> bug in JOSM if one can upload a single changeset that the reverter can't
> undo, and if so (I may be confused) this should be fixed in JOSM rather
> than be a special manual requirement.

It's not a bug in JOSM. JOSM gives you lots of way to shoot yourself in the
foot, this is due to an interaction between large changesets, the rails
port, database/serialization times on the changeset /download call and
imports.

Because it's pretty much import-specific it's not too serious an issue if
people are following the guidelines because they require you to have the
knowledge of how to fix your mistakes. The checklist suggests developing a
revert plan and the guidelines specifically state "If you don't know how to
revert an import, don't do the import in the first place."

All of this being said, an item on my to-do list is to propose reducing the
maximum changeset size. Right now it is too easy to make a changeset that
only specialized ill-documented tricky to use tools can download.