On 08/02/19 20:37, Ulrich Lamm wrote:
Am 08.02.2019 um 00:44 schrieb tagging-requ...@openstreetmap.org
<mailto:tagging-requ...@openstreetmap.org>:
Message: 2
Date: Fri, 8 Feb 2019 10:01:28 +1100
From: Warin <61sundow...@gmail.com <mailto:61sundow...@gmail.com>>
To:tagging@openstreetmap.org <mailto:tagging@openstreetmap.org>
Subject: Re: [Tagging] A general problem: Co-ordinate sets vs.
background informations
Message-ID: <0f90faea-b79f-668c-c887-035114856...@gmail.com
<mailto:0f90faea-b79f-668c-c887-035114856...@gmail.com>>
Content-Type: text/plain; charset=utf-8; format=flowed
I don't know what your trying to say here?
This looks to me like either ;
A) 'imported data cannot be changed'!
The problem with that is the imported data may be wrong, inaccurate
of simply old.
It is necessary that imported geometries can be changed.
It is necessary that also other data can be actualized.
B) 'imported data cannot be used'
The problem here is that OSM looses a valuable and large data source.
Yes it can be 'wrong', 'old' and/or 'inaccurate' but it does give a
starting point for improvements.
But for references on definitions, names, and scientific mesurements
of geographic objects,
it must be allowed to note "this value is from this source", also if
the source is not ODbL
And the provider (e. g. an official environment database) has the
natural right to be mentioned and to be cited correctly..
Therefore OSM has to accept Creative Commons conditions for such data.
No, OSM does not have to accept that.
I think that is what this is leading too, ... Creative Commons data
cannot be used in OSM. Unless they meet OSM requirements - usually a
waiver.
Courses and outlines of many natural objects are mapped very roughly OSM.
Values derived from such mappings are incorrect, too,
Certainly some things are rough, that is not a factor of the quality or
reliability of the data that OSM has access to, but a time limit of the
mapper to make that entry.
Given more time the mapper could make much better entries in to OSM ..
but they do have other things to do, like eat and sleep for instance.
All maps suffer the same constraints, time and money.
Experienced map users realise that any map is a representation that can
be out of data, distorted or 'rough' in certain places and ways.
OSM gives a fair chance of being up to date and accurate due to the
number of local contributors.
For some informations, OSM cannot be more correct than offiical databases:
Official definitions may be optimal or suboptimal, but they are valid.
They can be out of date. The definitions may not match public
perceptions of what it means.
And they certainly don't have world wide coverage.
Means of long timelines of measurements cannot be substituted by
single measurements in single visits.
Map users usually use the map over short time frames when on site, so
the accuracy of a single visit matches that of the map user.
OSm does not claim to be surveyor accuracy.
Once in OSM it can be changed by anyone. Even fumble fingered me.
Usually errors are picked up and corrected.
Even deliberate things that are wrong are picked up.
I had repeated the reasons for ODbL.
ODbL necessary for the import of geometries.
But if everything in OSM is ODbL,
OSM isolates itself form references (available under Creative Commons
conditions, only), which are essential for its reliability.
OSM reliability rests with us and the sources OSM can use.
Sources OSM cannot use, should not be used to make entries into OSM.
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