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<p><font face="Verdana">I don't see any added value for OSM to make
a new top-level value for process tanks. <br>
</font></p>
<p><font face="Verdana">As an engineer, I can say that any process
tank, depending on the stage in the process, is a storage tank.
Even if you would take into consideration, that due to what
appliances it has or how it is build, doesn't give you a clue of
whether it is used as a process tank or just a storage tank. <br>
Many get disused for, primarily processing, others don't.
Especially in water sewage faculties it is often difficult, even
for me as an engineer, if it is still in use as a process tank,
intended to be a process tank (because some storage tanks we
just add f.i. an aerator and it becomes a process tank ?). Now
you expect that this tag is going to solve this problem, an
issue where even experts disagree many times.<br>
A tank is just a tank, add some attributes to it if you are sure
and have seen proven that it is used for more then just storage,
then add attributes to it like in a process=* tag. Essentially
nothing is wrong to keep it under other top level tags, being it
water=reservoir, basin or pond or man_made=storage_tank. They
all can become a process tank somewhere in the processing of the
fluid, they all are just storage tanks in some stage of the
processing. Keep it simple.<br>
</font></p>
<p><font face="Verdana">Greetings,</font></p>
<p><font face="Verdana">Bert Araali</font><br>
</p>
<div class="moz-cite-prefix">On 27/03/2021 17:46, Brian M.
Sperlongano wrote:<br>
</div>
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cite="mid:CAMrfQx2-mH5z8NiYKsubDAXE3WzPxxkaUVP2c1b4rDNO1aR7Gw@mail.gmail.com">
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<div>For the 3 types of process tanks described in the proposal
(clarifiers, aeration tanks, and oxidation ditches), they are
usually open on top and have clearly distinguishing features
that make them easy to identify on imagery, once you know what
you're looking for. The annotated photos in the proposal were
developed specifically to provide that helpful guidance to
mappers.</div>
<div><br>
</div>
<div>For some other (as yet unspecified) type of process tank
which may exist, the answer is no different than for any other
feature on the map which is hard for an armchair mapper to
identify: use the surrounding context, research the facility,
and make an educated guess. Or, a mapper can simply say "I
don't know what this" and leave it unmapped until someone with
more knowledge comes around later.</div>
<div><br>
</div>
<div>In some cases, this information is available in public
sources. For example, in The Netherlands (where my co-author
is from, and where water infrastructure is a pretty big deal),
there is a public GIS source that has data on process tanks at
water treatment facilities. The fact that these features
might be hard to identify in some cases or in some places,
should not preclude more specific and accurate tagging in
places where the information is known and/or readily
available, or where these features *are* easily identifiable.</div>
<div><br>
</div>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Mar 21, 2021 at 8:54
AM Volker Schmidt <<a href="mailto:voschix@gmail.com"
moz-do-not-send="true">voschix@gmail.com</a>> wrote:<br>
</div>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">
<div dir="auto">I see a major problem with this approach to
specializing high-level tags.
<div dir="auto">When a non-expert mapper like me sees a
tank, say on a Mapillary image and in a satellite image,
what do I do with it? I see a tank that contains some
liquid, but I do not know whether its scope is storage
or processing. What do I do? And what about about the
400k+ storage tanks in the database some which in
reality are processing tanks.<br>
<div dir="auto">
<div dir="auto"><br>
</div>
</div>
</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 20 Mar 2021,
22:02 Brian M. Sperlongano, <<a
href="mailto:zelonewolf@gmail.com" rel="noreferrer"
target="_blank" moz-do-not-send="true">zelonewolf@gmail.com</a>>
wrote:<br>
</div>
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<div dir="ltr">Hello,<br>
<br>
A request for comment is now open for the proposal
"Process tanks". This proposes the new tag
man_made=process_tank to tag tanks used for
processing, just like we have man_made=storage_tank
for tanks used for storage. In addition, 3 sub-tags
are proposed for specific, identifiable process tanks
used in water treatment facilities. This is the third
proposal in a series of proposals working to improve
the tagging scheme for water features.<br>
<br>
Many thanks to those who had expertise in this area
and assisted in the drafting of this proposal.<br>
<br>
The proposal can be found here:<br>
<a
href="https://wiki.openstreetmap.org/wiki/Proposed_features/Process_tanks"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true">https://wiki.openstreetmap.org/wiki/Proposed_features/Process_tanks</a><br>
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