Changes between Version 111 and Version 117 of Help/Concepts/Object


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  • Help/Concepts/Object

    v111 v117  
    1 [[TranslatedPages(outdated=Member; Membership; Child and Parent not explained properly. Any need to split Tags into two parts ?)]]
     1[[TranslatedPages(outdated=Member; Membership; Roles; Child and Parent not explained properly. Any need to split Tags into two parts ?)]]
    22
    33
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    88[[PageOutline(2-10,Table of Contents)]]
    99
     10
    1011== Nodes, ways, and relations == #NodesWaysRelations
    1112
    1213=== Tags (also an OSM data primitive) === #Tags
    1314
    14 Tags provide meaning to the objects. Without them, any other object would be useless and meaningless. Each of ''three other data primitives'' '''can have multiple tags'''.
     15Tags provide meaning to the objects. Without them, any other object would be useless and meaningless. Each of ''three other data primitives'' **can have multiple tags**.
    1516
    16 [=#presets Often tags used in combinations; '''usually these combinations can be found] in [wikitr:/Presets presets]'''. But it may be true that tags you need to use are not in presets and you need to know them first.
     17[=#presets Often tags used in combinations; **usually these combinations can be found] in [wikitr:/Presets presets]**. But it may be true that tags you need to use are not in presets and you need to know them first.
    1718
    1819Simplest example is [osmwiki:Key:drinking_water drinking_water=yes] - it is present globally and can be applied to every object that provides water. Other example is [osmwiki:Key:leaf_cycle leaf_cycle]=* of trees, it will have less coverage globally (as trees do not grow just everywhere).
    … …  
    3940Since nodes are ordered in OSM; every way in OSM has a direction. This gives us possibility to add tags (details about object) such as [osmwiki:Key:conveying conveying=*] - to specify direction of escalators and moving walkways or [osmwiki:Key:incline incline=*] which can be used toghter with roads and footways. There [osmwiki:Category:Way_Direction_Dependent more examples] and we can't cover them all.
    4041
    41 **Note**: Rendering of direction in [wikitr:/Help/MapView MapView] can be set in Display Preferences under [wikitr:/Help/Preferences/Display#OSMData OSM Data].
     42**Note**: Rendering of direction in [wikitr:/Help/MapView MapView] can be set in Preferences under [wikitr:/Help/Preferences/DrawingPreference OSM Data].
    4243
    4344==== Segment ====#Segment
    44 Is '''a fragment between two consequent points of the way''' ([https://en.wikipedia.org/wiki/Line_segment "line segment" from ordinary geometry]). This is not a part of OSM data model, but users often distinguish because of tools than operate on segment level (rather than on complete way); please, distinguish a segment(s) from complete "way"s.
     45Is **a fragment between two consequent points of the way** ([https://en.wikipedia.org/wiki/Line_segment "line segment" from ordinary geometry]). This is not a part of OSM data model, but users often distinguish because of tools than operate on segment level (rather than on complete way); please, distinguish a segment(s) from complete "way"s.
    4546
    46 **Note**: Rendering of segments in [wikitr:/Help/MapView MapView] can be set in Display Preferences under [wikitr:/Help/Preferences/Display#OSMData OSM Data].
     47**Note**: Rendering of segments in [wikitr:/Help/MapView MapView] can be set in Preferences under [wikitr:/Help/Preferences/DrawingPreference OSM Data].
    4748
    48 ==== Areas ==== #ClosedWays
     49==== Areas ==== #Areas
    4950[[JOSMImage(data/closedway,24,middle,margin-right=15,margin-bottom=5,link=)]] If a **way** is closed, i.e. if the last node is the same as  the first node, it is also called an **area**. Old term for this is ''Closed Ways'' (it is still present at wiki, used in software and by some mappers; other part uses "geometry" when talking just about shape of the objects, without tags).
    5051
    … …  
    5657If some object can be represented with single ''node'' or ''way'' and ''multiple tags supported by software'', then there is no need in relations. But there are some rare cases where it is theoretically and practically impossible ''only with nodes, ways and tags'' (ex. turn restrictions, will be covered below).
    5758
    58 This means '''you can [#Tags1 skip this big "Relations" section], until you decide to add or edit a relation'''.
     59This means **you can [#Tags1 skip this big "Relations" section], until you decide to add or edit a relation**.
    5960
    60 ==== Simple explanation ====
     61==== Simple explanation ====#SimpleExplanation
    6162[[JOSMImage(data/relation,24,middle,margin-right=15,margin-bottom=5,link=)]]  A **relation**:
    6263* is a sequence of other objects (nodes, ways and relations)
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    7172==== Most popular types ====
    7273
    73 ===== type=multipolygon =====
     74===== type=multipolygon =====#typemultipolygon
    7475
    7576A water object ({{{natural=water}}}), a building ({{{building=*}}}) or administrative boundary ({{{admin_level=*}}} tag) usually consist of the  multiple spatially separated parts belonging to the one object. More importantly, each of these parts can have exclusions ([https://en.wikipedia.org/wiki/Enclave_and_exclave enclaves/exclave] or simply islands or swamps in the water basins).
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    9293
    9394Can be used to describe turn restrictions according to signs and road marking. JOSM has a plugin to support this type of relations: [osmwiki:JOSM/Plugins/Turnrestrictions Turnrestrictions plugin],[osmwiki:Relation:restriction#Examples Examples]
     95
    9496
    9597== Tags ==#Tags1
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    115117In the [[JOSMImage(dialogs/propertiesdialog)]] [wikitr:/Help/Dialog/TagsMembership Tags/Membership panel] you can assign tags to an object, remove tags from an object, or edit assigned tags.
    116118
     119
    117120== Technical properties ==
    118121
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    121124
    122125In JOSM, a new object doesn't have an ID (its ID is 0) until it is uploaded the first time to the OSM server.
    123 * Under **''[[JOSMImage(preference)]] [wikitr:/Help/Action/Preferences Preferences]''** (or **''`F12`''**) -> [[JOSMImage(preferences/display,24,link=,middle)]] **''[wikitr:/Help/Preferences/Display Display Settings] -> Look and Feel''** it is possible to en- or disable the display of objects ids in the windows.
     126* Under **''[[JOSMImage(preference)]] [wikitr:/Help/Action/Preferences Preferences]''** (or **''`F12`''**) -> [[JOSMImage(preferences/display,24,link=,middle)]] **''[wikitr:/Help/Preferences/Display Display]''** it is possible to en- or disable the display of objects ids in the windows.
    124127* With **''File -> [[JOSMImage(downloadprimitive)]] [wikitr:/Help/Action/DownloadObject Download object ...]''** it is possible to download **objects** by Ids.
    125128
    126 **Note**: The display of object ids in the [wikitr:/Help/Dialog/SelectionList Selection List] can be set in Display Preferences under [wikitr:/Help/Preferences/Display#LookAndFeel Look and Feel].
     129**Note**: The display of object ids in the [wikitr:/Help/Dialog/SelectionList Selection List] can be set in Preferences under **''[wikitr:/Help/Preferences/Display Display]''**.
    127130
    128131
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    136139Also, you can use time sliced data (region extracts by date) to inspect how objects were changing (and refer to object id and point in time from the database).
    137140
    138 **Note**: The display of object versions in the [wikitr:/Help/Dialog/SelectionList Selection List] can be set in Display Preferences under [wikitr:/Help/Preferences/Display#LookAndFeel Look and Feel].
     141**Note**: The display of object versions in the [wikitr:/Help/Dialog/SelectionList Selection List] can be set in Preferences under [wikitr:/Help/Preferences/Display Display].
    139142
    140143==== Information about latest version ====