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<div class="moz-cite-prefix">On 16/12/2019 12:32, Andy Townsend
wrote:<br>
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<blockquote type="cite"
cite="mid:00271e5d-0890-3ae6-5a22-0212f1894cf5@gmail.com">
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<li>Firstly, I only tend to add farmland etc. after I've added
fences, walls, ditches, gates, bits of woodland etc. (it's
just easier that way around).</li>
<li>If the crop extends right up to the hedge, I'd tend to have
the hedge sharing nodes with both fields.</li>
<li>If there's a ditch, track or other separating feature I'd
try and draw the hedges either side (if they exist) and have
the farmland not sharing nodes with the ditch but with the
hedge (if it exists). Similarly I wouldn't attach farmland to
roads.</li>
<li>If there's an uncultivated strip around the edge of the
field I wouldn't tend to include that in the "field".
Similarly if an area is left as scrub (perhaps to wet for
crops), I'd map as scrub.</li>
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</blockquote>
<p>+1</p>
<p>After several years mapping Northumberland (about 60% complete!),
that's almost exactly the same style I've landed on.</p>
<p><br>
</p>
<p>Adding boundaries and rivers first helps get a feel for the area,
then adding individual polygons is easier with the follow tool in
JOSM. <br>
</p>
<p>Large areas of one polygon are a PITA to maintain later - e.g. if
a meadow is ploughed up, or a housing estate appears. (I know -
I've cursed my own previous less detailed mapping several
times...)</p>
<p><br>
</p>
<p>Also to help with maintenance, I separate roads from landuse
UNLESS in upland areas where there may be less field boundaries
but barrier=cattle_grid visible which means the sheep really are
in the middle of the highway.</p>
<p>And, please don't chop up roads into little segments so one way
can be used in four area relations (my least favourite maintenance
PITA). Your future self will be happier if you draw separate
lines! :-)</p>
<p><br>
</p>
<p>My own practice is to show a pattern of cultivation with
different tags such as farmland, meadow, scrub, heath. In
Northumberland this can give additional information at large
scales as height limits the types of farming which are viable as
you rise inland from the coast.</p>
<p>And yes, farmers do indeed plough up grazing land and rotate
crops - I try to map what is visible from cycle survey, and
different imagery providers whilst accepting it's not going to be
as canonical as a housing estate!<br>
</p>
<p>TTFN,</p>
<p><br>
</p>
<p>James
</p>
<pre class="moz-signature" cols="72">James
--
James Derrick
<a class="moz-txt-link-abbreviated" href="mailto:lists@jamesderrick.org">lists@jamesderrick.org</a>, Cramlington, England
I wouldn't be a volunteer if you paid me...
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/user/James%20Derrick">https://www.openstreetmap.org/user/James%20Derrick</a>
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