|natural = tree|
|A single tree|
|Rendering in OSM Carto|
|Used on these elements|
|Tools for this tag|
A single tree, sometimes lone or significant.
How to map
- leaf_type=broadleaved/needleleaved - describes the type of leaves.
- genus=* - scientific name of the genus (first part of the scientific name). If you add species=* this is not necessary.
- species=* - scientific name of the species (popularly known as the Latin name). Please use the namespaces for local languages (see examples).
- taxon=* - scientific name describing any taxonomic level e.g. order, family, genus, species, sub-species or cultivar.
- sex=male/female - Some species are dioecious, meaning that an individual has only male or only female flowers. A good known example are all willows (Salix).
- protected=yes/no - Some trees have Tree Preservation Orders these Trees are looked after by local groups or councils. This protection can be set because of the importance for local community, protected local species, provide protection or other.
- circumference=* - for the circumference of the trunk (measured in a height of 1.3 metre above ground). If no unit is given metres are assumed.
- diameter=* - Alternative for circumference, the diameter of the tree trunk measured at 1.30 meters from the ground. This is conventionally done in arboriculture where it is called diameter at breast height (DBH). If no unit is given millimetres are assumed.
- height=* - for the height. If no unit is given metres are assumed.
- diameter_crown=* - for the diameter of the crown of foliage of the tree (i.e. the diameter of the smallest cylinder that would contain all of the branches, leaves, trunk and any other above-ground parts of the tree). If no unit is given metres are assumed.
- name=* - for individual trees which have a name, usually these are either individual trees with a historical or traditional name or trees with a name given in memory of special events (> memorial tree). The usual rules for name=* apply. This tag must not be used for a description of the species.
- leaf_cycle=deciduous/evergreen/semi_deciduous/semi_evergreen - describes the phenology of leaves.
- source=survey/local knowledge/survey;local knowledge - indicating where the information added origniated from. Use source=survey for only observed or measured data. Use source=local knowledge for only data from common knowledge as start_date=* or other historical information in description=*. Use source=survey;local knowledge when a combination is the case. When trees were imported from local government open data sources, use only source:name=*, source:ref=* and source:addr=*.
type=broad_leaved/conifer- Caution: The usage of type=* for non-relation elements should be avoided! (use leaf_type instead). type=palmhas been deprecated without a clear valid alternative. Please do not use taxon=Palm as "Palm" is not a scientific taxon.
See other, undiscussed ideas at the plant descriptors page.
List of Genus, Leaf cycle, Leaf type
The taxonomic rank "genus" and "species" of the biological classification (kingdom → phylum → class → order → family → genus → species ...) are used for trees in OSM, as in the following example:
(deciduous or evergreen)
(needleleaved or broadleaved)
|Quercus||Oak||Chêne||Quercus Ilex||holm Oak||Chêne vert||evergreen||broadleaved|
|Platanus||Plane||Platane||Platanus × hispanica||London plane||Platane commun||deciduous||broadleaved|
- Main article: List of Genus, Leaf cycle, Leaf type
Many tags associated with trees may be regarded as redundant as they can be derived from other tags. This is particularly true if the species is tagged (either with species or with taxon at species level or below), but in most cases also if only the Genus is tagged. In these cases properties are potentially derivable directly from the species/genus/taxon.
However it is often useful to retain (& even add) these values (e.g. genus, leaf_type, leaf_cycle) for the following reasons:
- Some genera, notably the Oaks, Quercus, have species which are deciduous and others which are evergreen. Thus the combination just with genus is not adequate.
- The original mapper may not have identified the tree, but did know that it was deciduous, and identification was added later.
- It makes life easier for consuming the data for applications which do not require precise botanical names. Lookups on genus/species/taxon names are not always as straightforward as one might expect. Trees may have completely different generic names in different countries, or the name may have changed but mappers are using older reference material.
- Mappers don't always identify trees correctly. Leaf_cycle & leaf_type are less susceptible to errors.
- leaf_type & leaf_cycle are much easier to verify at most times of year. Some tree identifications will take more time than a mapper might wish to spare, but obvious changes will be easier to spot.
Subtag denotation to indicate the significance
It can be helpful to further describe the context and significance of a tree. It can be used for some maps to enhance landmarks and to tone down or skip unremarkable trees. There are some further suggestions for this on the discussion page. denotation=* seems to be widely in use. To mark monumental trees: additional monument=yes (compare to historic=monument).
If you want to map a line of trees, have a look at natural=tree_row. (When along a road, this is sometimes called "avenue of trees", allé or allée.) This approach can also be combined with individually mapped trees for further details.
Tree stumps / stubs
When a tree falls on top of a path, this can be mapped with barrier=log. However, some fallen trees form a landmark in themselves, especially when they were a denotation=natural_monument. Some mappers have used natural=fallen_tree to map such fallen trees.
A walnut tree (common walnut):
- species=Juglans regia (this is the latin species name)
- species:en=Common Walnut
- species:de=Echte Walnuss
An oak tree (unknown species):
A spruce tree (unknown species):
A birch tree (unknown species):
A Canary Island date palm:
For notable trees:
- - general tree icon used in OpenStreetMap Carto (Standard layer)
- - broad-leaved
- - evergreen
- - palms (type=palm — deprecated)
Renderers may use one map symbol for any kind of tree. If foliage dependent symbols (as above) shall be applied, the easiest solution is to evaluate the leaf_type=* and leaf_cycle=* tags. If these are unset, you can derive them from the genus. The genus is the value of the genus=* tag. It is also the first portion (substring before the first whitespace) of the value of the species=* tag.
Palm trees are trees of the family. As of 2021-09-06 there is no community consensus on how to tag these trees, although several different tags are in use. Most of these tags are technically incorrect, because palm is not the scientific name of these trees and palm trees are a family rather than a genus or species.
Examples of existing tags for palm trees are:
Initially this tag was supposed to be used only for lone or significant trees (As nothing in tag name itself indicated that it was not supposed to be used for ordinary trees it was used to mark trees that were neither lone nor significant - ignoring the definition on wiki).
Currently it is commonly used to mark normal trees and other tags were introduced to mark that tree is significant.
- natural=tree_row - for tree rows
- natural=tree_stump - for tree stumps / cut down trees
- natural=fallen_tree - for fallen trees that have not been removed (maybe deliberately and will remain, e.g. monumental trees)
- tree_lined=* - a property where a line of trees runs along a feature and belongs to it (e.g. an avenue). Added to the feature, not to the trees.
- natural=plant - for mapping herbaceous plants
- natural=shrub - for mapping shrubs
- Proposed features/Tree - accepted initial proposal in 2007, for this tag
- landuse=forest, natural=wood - managed/unmanaged woodland
- habitat=* (proposed)
- plant_community=* (proposed)
- Tree table - ideas for mapping 3D trees
- Environmental OSM - OpenStreetMap environmental projects and tags
- Invasive Non-Native Species - proposal for recording invasive species
- City_tree_registers - Sources for imports