[Tagging] Farmlands subject to rotation of crops

Volker Schmidt voschix at gmail.com
Wed Jul 22 08:35:04 UTC 2020


This is a rather tricky problem, especially as the changes may not follow
any particular pattern.
I am not a crop mapper at all, but I can distinguish between the major
local crops (in Italy). And in many cases the mapping in OSM is wrong,
mostly because the data is fruit of imports which were too specific.
One effect which is noticeable around here is not rotation, but that the
crops tend to follow patterns like market prices, or subsidies by the EU.
There are exceptions, like corn (mais) which normally does not change. So
my experience with precise crop mapping is that very often it is simply
wrong.
There are obvious exceptions, like orchard (fruit, olives), and vineyards.
But most annually sown crops may change easily, and the average OSM mapper
does not update crops. I would go with farmland, orchard, vineyard and not
even consider indicating any rotation of crops.

That does not exclude making a special effort in certain areas, provided
you have the trained mappers.

On Tue, 21 Jul 2020 at 17:13, Michael Montani <michael.montani at un.org>
wrote:

> Dear all,
>
> I wanted to check with you which is the best way to map farmlands subject
> to rotation of crops. An example could be of a farmland used for general
> crop in one part of the year and left it at rest for the remaining part of
> the year, being actually used as a meadow for animals grazing there.
>
> Which would be the best way to tag such area?
>
> Thanks,
>
> --
> *Michael Montani*
> GIS Consultant, *Client Solutions Delivery Section*
> *Service for Geospatial Information and Telecommunications Technologies*
> United Nations Global Service Centre
> United Nations Department of Operational Support
>
> Brindisi | Phone: +39 0831 056985 | Mobile: +39 3297193455 | Intermission:
> 158 6985
> E-mail: michael.montani at un.org <mail at un.org> | www.ungsc.org
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