Hi Frederik,
Hrm...yeah, it's just a question of: in what form. The entire tool
chain for creating X-Plane scenery is open source, and we're looking
into _some_ way to have it run on a semi-continual basis. (Historically
we 'recut' the world when we release a new paid major version, but our
users have quite vocally requested that we sync with OSM more frequently
than that :-)
There are two possible problems:
1. By the time we do our sanity analysis, the data has been processed
six ways from Sunday; the actual resulting 'notices' may not be directly
applicable back to OSM. We certainly could come up with coordinates
(e.g. "a problem of type X happened at this location") but, for example,
we purge out node/way OSM IDs to save memory when processing large files.
2. Some of what we consider wrong might really be DB problems, but
others might just be because X-Plane's idea of the world can be limited,
and there are real-world exceptions. So...how do you filter out false
positives from problems that need to be fixed?
Still, there are a bunch of interesting things we could do here. We
integrate OSM against other data sets, so for example, we have a rough
notion of the amount of water in the area (from raster data) and can
thus detect areas where major water bodies have gone unmapped.
cheers
Ben
On 4/20/11 11:58 AM, Frederik Ramm wrote:
Hi,
On 04/20/11 17:51, Ben Supnik wrote:
3. We sanity check the incoming data. This is fairly specific to our app
case and may not be appropriate for others. If a way goes straight up a
mountain at a 80 degree slope and its type is motorway=trunk, we throw
it out. It's much more likely that there's a conflict between our
elevation data and the road than that there's a road going up at that
slope, and frankly it's going to look stupid in X-Plane anyway. So we
protect ourselves from data problems by being more committed to
'plausibility' than 'accuracy'.
Any chance you can make these cases available - on a regular basis,
ideally - so our users could, if interested, have a look and fix them?
Bye
Frederik
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