On 30-Jul-17 12:04 AM, Tobias Zwick wrote:
Thanks for your answers. It looks like it is pretty clear what is the
currently accepted tag for orchards then. As for the difference between
orchard and farmland - ignoring plantation for its missing documentation
and very rare use -, we identified the following key differences between
orchard and farmland which should be very clear:
- In an orchard, plants are cultivated which are perennial, the plants
have continuance. Usually only the fruit of the plants are picked.
From satellite imagery, orchards usually appear as systematically
planted bushes/trees or rows of hedges separated by corridors (for
machines/workers)
- Farmland grows plants that are harvested as a whole (i.e. with
tractors), thus the actual crop can change during the years and
even several times within a year (see crop rotation) as after the
harvest, nothing is left from the plant. On satellite imagery,
they usually appear as an acre, meadow (when fallow) or densely
planted high grass/cereals.
Some orchards are harvested using tractors too... so that is not a deciding
factor of orchard to farmland.
Crop rotation can be tagged using multiple values
e.g. produce=wheat;barley Farmers will follow market trends compatible with
their equipment and farm soil/climate .. fairly consistent choices for them.
Apart from that, I generally agree with those that answered that they
would prefer "produce" - for the same reasons. Especially for things
like oil_palms, banana_plants, coffee_plants, vanilla_plants, the
various types of berries etc. the "trees" key does not really fit.
Moving forward, would anyone think that "produce" is definitely the
wrong key to use for detailing on the produce/crop/type of orchards? (I
am not rallying to make the other two keys deprecated here, this is just
about which of the three keys the app should use to add a tag.)
The keys 'tree' and 'crop' are not universal to the output of 'farms' eg
oysters, where as the key 'produce' looks to be universal.
The key 'tree' is being misused to tag things that are not trees e.g.
strawberry plants.
A mapper sees plants in a field and they are worth mapping.
But in terms of what comes out the farm gate, the produce key is best.
Greetings
Tobias
P.S: Here is a list of different types of produce (of orchards aka
plantations) we identified. Currently mostly "translated" to the
"trees"-tagging:
https://github.com/rugk/crops-parser/blob/master/osmcrops.csv
The list is for the key 'crop'.
And it contains some that could be better - e.g. crop=walnut_trees ... the
tree is not the crop/produce.
It may be possible to have a more structured approach as the table hints at
with crop=nut.
For example
produce=nut
nut=walnut
produce=vegetable
vegetable=tomato
The OSMwiki page on produce has some more thoughts .. (at least some are mine -
use with caution!)
http://wiki.openstreetmap.org/wiki/Key:produce
On 27/07/2017 23:05, Christoph Hormann wrote:
On Thursday 27 July 2017, Tobias Zwick wrote:
Together with Roland Krüger, I am in the process of letting users of
StreetComplete, a surveyor app for OpenStreetMap, specify the produce
of orchards.[1]
We did a lot of research on which plants are grown on orchards [2]
and are now at the point where we need to decide how these should be
tagged.
Unfortunately, there are *three* competing keys to describe basically
the same things (for orchards). Neither of these is deprecated, all
are in use: trees, crop and produce.
Taginfo is your friend to find out what tags are most commonly used.
It tells you on
https://taginfo.openstreetmap.org/tags/landuse=orchard#combinations
landuse=orchard + trees=*: 82k cases
landuse=orchard + crop=*: 4.9k cases
landuse=orchard + produce=*: 2.9 cases
and you can also see that genus=* and species=* are much more common
than crop=* or produce=*.
If you look at:
https://taginfo.openstreetmap.org/keys/crop#values
You can see that this tag is most commonly used for farmland.
If you look down the list you can also spot 945 cases of
crop=bananas,_papapyas,_mangos
https://taginfo.openstreetmap.org/tags/crop=bananas%2C_papapyas%2C_mangos
which - if you follow the link to overpass turbo - turn out to all be on
an island in Nicaragua in combination with landuse=orchard.
Safe to say that trees=* is the dominating method to tag what is grown
in an orchard.
Note the wiki is currently fairly unclear about the separation between
landuse=orchard and landuse=farmland. On
https://wiki.openstreetmap.org/wiki/Tag%3Alanduse%3Dorchard
it suggests landuse=plantation for fruit bushes which links to
landuse=plant_nursery which is clearly unsuited for this purpose. This
seriously needs clarification.
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