Changeset: 41206957
Australia, NSW, Camp sites
Closed by Warin61
Tags
created_by | JOSM/1.5 (10526 en) |
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source | LPI NSW Base Map |
Discussion
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Comment from aharvey
How did you check for duplicates?
eg. you added https://www.openstreetmap.org/node/4333395907/ but it already existed as https://www.openstreetmap.org/relation/6396344
I've been seeing a lot of duplicated features from your Base Map imports.
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Comment from Warin61
I checked for duplicate nodes .. not certain that I did check ways (too long ago to recall) .. and probably not relations. This change set 3/8/16 so 'my' node would have been that date .. relationship dated 9/7/16 so ~ a month previous.
Humm I did a recheck some time ago on duplicates .. but again I'm not certain which things I checked.
So these duplicates you have noted ... were they only campsites? Or anything else?
Thanks for letting me know. -
Comment from Warin61
Humm scanning ... found 1 add the day before by you .. from Imagery .. deleted mine and add the name from the base map.
Another is displaced by 200 metres .. I'll do some more looking tomorrow (and think about the displacement). -
Comment from Warin61
Ok .. found 7 that I have deleted. About half of those are mine.
Did not answer your question of how I checked for duplicates .. I think at that time I was using the OSM cycle map .. that appeared to have the best rendering of camp sites ... but it may have been slow to render new data .. thus I missed some?
I will still have to scan manually for displaced ones. -
Comment from Warin61
Over 187 camp sites manually scanned. 78 deletions .. not all camp sites but most of them. Not all 'mine'. 230 objects modified .. some 'camp_sites' to pitches as the camp site is already tagged .. again not all mine.
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Comment from aharvey
> So these duplicates you have noted ... were they only campsites? Or anything else?
I keep finding issues across all your LPI Base Map imports.
eg. I just deleted http://www.openstreetmap.org/node/4380404863 since it was already mapped as http://www.openstreetmap.org/node/691125312
> I will still have to scan manually for displaced ones.
Agreed, although it would have been better to do this before so you're not importing existing data and creating duplicates.
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Comment from Warin61
I have looked back at my lookout files (I did not bother with check my old campsite files .. but I'd not think I was consistent from one feature type to another .. hopefully improving all the time) .. and cannot find a duplicate for tuckers lookout ... so the checking was done. Did something else go wrong.. my clumsy fingers for instance?
I do take it that these were on top of one another ? -
Comment from Warin61
Looking back at my old files for lookouts ... each node carries a tag "fixme=check for duplictes and web links" .. and each node was manually checked against the osm map background for the duplicate.. then those were uploaded to OSM having deleted each fixme tag as they were done. However node of those files carry the Tuckers Lookout node .. so I am wondering if I downloaded the OSM lookouts .. and then some how uploaded them accidentally - not part of my checking/data.
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Comment from aharvey
The existing node has been there for the past 4 years http://www.openstreetmap.org/node/691125312/history
Next time it would be great if you could post on the mailing list your intention to do an import and we can check the process to make sure things like this aren't missed.
Another one I just fixed up http://www.openstreetmap.org/changeset/47189402
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Comment from Warin61
Arr .. I see now.
What you are deleting are displaced things.My experience with LPI data suggest in many instances it is better than the data in OSM despite the mappers attribution of 'source=survey' or 'source=gps'. How do I know that ? In the instances of roads i have used the Strava heat map .. and that confirms that the LPI data is better than the OSm data.
I personally decided to add the duplicates so that users could see both .. and hopefully decide to edit the incorrect one out.
In the instance of Tuckers Lookout the LPI one appears to conform closely with written descriptions and the imagery .. I feel a personal survey coming on with GPS, camera, tripod and a packed lunch.
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Comment from aharvey
Not all data is equal. Different types of features like roads vs lookouts could dramatically vary in accuracy, even within the same feature types, the accuracy in the LPI Base Map can and does vary.
Since we don't know the where each feature in the LPI Base Map came from, I don't think it should have precedence over a good consumer grade gps and or lpi imagery.
OSM is not a clone of the LPI Base Map, I feel a ground survey should prevail. It might be better to use the OSM notes feature to add a note where you think the LPI Base Map is correct, so a ground survey can be done rather than adding duplicates.
For Tuckers Lookout, I have been to http://www.openstreetmap.org/node/691125312 and know there is a lookout there, but I can't remember if it was signed with a name.
Nodes (1-20 of 36)
- 1
- 2
- Apple Tree Flat Campsite (4333395897), v1
- Bangalee Scout Camp (4333395898), v1
- Bennetts Ridge Campsite (4333395899), v1
- Berrima Scout Camp (4333395900), v1
- Bristol Point Camping Ground (4333395901), v1
- Bulli Beach Camping Reserve (4333395902), v1
- Bundilla Scout Camp (4333395903), v1
- Burralow Picnic And Camping Area (4333395904), v1
- Callemondah Guide Camp (4333395905), v1
- Camp Kanangra Scout Camp (4333395906), v1
- Camp Kariong (4333395907), v1
- Camp Knox (4333395908), v1
- Camp Toukley (4333395909), v1
- Camp Wanawong (4333395910), v1
- Crosslands Youth Camp (4333395911), v1
- Glengarry State Training Centre (4333395912), v1
- Glenrock Scout Training Camp (4333395913), v1
- Ingleside Scout Camp (4333395914), v1
- Kentlyn Campsite (4333395915), v1
- Lynchwood Boy Scout Camp (4333395916), v1
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