<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">> From: Mateusz Konieczny <<a href="mailto:matkoniecz@tutanota.com" target="_blank">matkoniecz@tutanota.com</a>><br><br>> I consider it as an useful information to distinguish permanent waterways and waterbodies<br>
<br>> from nonpernament.<br></blockquote><div><br></div><div>I agree. As a point of reference, the standard 1:25000 topographic maps of Spain produced by IGN, the national geographic institute, distinguishes between these two categories of water course. In the legend they are labelled as "curso de agua: permanente, intermitente". I think that is a good indication that this is a meaningful distinction. And I believe it is very similar to how things are already mapped in OSM. </div><div><br></div><div>It is fine to give mappers ways to add finer details of seasonality, ephemerality and so on, but the basic distinction that already exists seems to be useful in its own right.<br></div><div><br></div><div>As an aside, dictionary definitions of "intermittent" tend to say something like "<span style="color:rgb(102,102,102);font-family:Verdana,Helvetica,Arial,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">occurring occasionally or at regular or irregular intervals" </span><span style="font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">(example from Collins) which covers all forms of non-permanence, seasonal or otherwise. So current OSM usage of the tag, as well as being meaningful and useful, matches usage in everyday English.<font color="#666666" face="Verdana, Helvetica, Arial, sans-serif"><span style="font-size:15px"> </span></font><span style="color:rgb(102,102,102);font-family:Verdana,Helvetica,Arial,sans-serif;font-size:15px"> </span></span>
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