[Imports] Hydrographic data import from LINZ

[Kyle Hensel]

Hi Pierre,

Yes, LINZ updates their topographic data every few years. The next refresh for the Ross Dependency is coming in 2022 or 2023. All the LINZ imports add a tag called ref:linz:****_id to every features, so that we can easily add/move/edit/delete the OSM data when new government data is released. This system works efficiently, we already use it fortnightly for street addresses.

Best regards,
Kyle


From: Pierre Béland<mailto:pierzenh at yahoo.fr>
Sent: Sunday, 24 October 2021 14:01
To: imports at openstreetmap.org<mailto:imports at openstreetmap.org>; Kyle Hensel<mailto:K.y.l.e at outlook.co.nz>
Subject: Re: [Imports] Hydrographic data import from LINZ

Hi Kyle,

Do you have a plan to retrace the crevasses as they move over time ?

Pierre


Le samedi 23 octobre 2021, 20 h 53 min 12 s UTC−4, Kyle Hensel <k.y.l.e at outlook.co.nz> a écrit :



Hi, I’m not sure what you mean by ‘geometrically incompatible features’

As we discussed in that changeset, I can’t see this ‘damage to the database’ that you’re talking about.



The link you referred to is a bit confusing beacuse it shows every node/way/relation in OSM, rendered in the same colour.



https://overpass-turbo.eu/s/1cjT is a view of the same area, with streams and crevasses coloured differently.

From this map you can see that the waterways are logically mapped, as are crevasses.



The red lines may look ‘messy’, but this is because there are many crevasses within the Canada Glacier.

If you’re unfamiliar with this type of terrain, see https://wiki.osm.org/File:Parque_estatal_Chugach,_Alaska,_Estados_Unidos,_2017-08-22,_DD_94.jpg



Hope this clarifies the situation



Best regards,

Kyle





From: Christoph Hormann<mailto:osm at imagico.de>
Sent: Saturday, 23 October 2021 23:47
To: imports at openstreetmap.org<mailto:imports at openstreetmap.org>
Subject: Re: [Imports] Hydrographic data import from LINZ



On Saturday 23 October 2021, Kyle Hensel wrote:
> Hello,
>
> In New Zealand we are planning to expand the import of data from Land
> Infomation New Zealand (LINZ).

I like to point out that this import proposal is part of a series of
imports that has proven to be problematic in results as previously
pointed out (non-successfully) to the importer:

https://www.openstreetmap.org/changeset/111427028

In particular

> We will use the same system as the topographic data import and
> address import, so every single feature will be reviewed using a
> modified version of the RapiD editor.

has been proven to be incorrect as evidenced by the speed of the
imports:

https://www.openstreetmap.org/user/kylenz_linz/history

and the resulting damage to the database, littering it with
geometrically incompatible features, like for example visible here:

https://www.openstreetmap.org/#map=13/-77.6183/162.8670&layers=D

--
Christoph Hormann
https://www.imagico.de/

_______________________________________________
Imports mailing list
Imports at openstreetmap.org
https://lists.openstreetmap.org/listinfo/imports


_______________________________________________
Imports mailing list
Imports at openstreetmap.org<mailto:Imports at openstreetmap.org>
https://lists.openstreetmap.org/listinfo/imports

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/imports/attachments/20211024/98a02456/attachment.htm>