Changes between Version 9 and Version 10 of Help/Concepts/Object
- Timestamp:
- 2011-06-04T19:45:40+02:00 (14 years ago)
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Help/Concepts/Object
v9 v10 9 9 [[TOC(inline)]] 10 10 11 == Nodes, ways, and relations == 11 == Nodes, ways, and relations == #NodesWaysRelations 12 === Nodes === 13 [[Image(source:trunk/images/data/node.png)]] A '''node''' is an individual point with a defined position. 12 14 13 * [[Image(source:/trunk/images/data/node.png)]] - a '''node''' is an individual point with a defined position. 15 === Ways === 16 [[Image(source:trunk/images/data/way.png)]] A '''way''' is a sequence of nodes. Despite its name a '''way''' doesn't represent ways in the real-world only. An OSM '''way''' is also used to represent a river, the boundaries of a country, or even a building. If a '''way''' is closed, i.e. if the last node is the same as the first node, it is also called an '''area'''. 14 17 15 * [[Image(source:/trunk/images/data/way.png)]] - a '''way''' is a sequence of nodes. Despite its name a '''way''' doesn't represent ways in the real-world only. An OSM '''way''' is also used to represent a river, the boundaries of a country, or even a building. If a '''way''' is closed, i.e. if the last node is the same as the first node, it is also called an '''area'''. 16 17 * [[Image(source:/trunk/images/data/relation.png)]] - a '''relation''' is an sequence of other objects, for instance a sequence of '''ways''' (representing road segments) and '''nodes''' (representing bus stops) which represent a bus route. Each object participating in a '''relation''' can be assigned a '''role''', for instance `stop` for a bus stop in the bus route, or `forward` for a road segment which is part of the bus route from the start to the terminal station. 18 === Relations === 19 [[Image(source:trunk/images/data/relation.png)]] A '''relation''' is an sequence of other objects, for instance a sequence of '''ways''' (representing road segments) and '''nodes''' (representing bus stops) which represent a bus route. Each object participating in a '''relation''' can be assigned a '''role''', for instance `stop` for a bus stop in the bus route, or `forward` for a road segment which is part of the bus route from the start to the terminal station. 18 20 19 21 == Tags == … … 36 38 You are free to assign an object whatever tag you feel necessary. However, there is a list of so called [http://wiki.openstreetmap.org/wiki/Map_Features Map Features], i.e. a canonical list of '''tags''' with a well-defined meaning which are often used by mappers. Whenever possible you are adviced to stick to these tags because map renderers, routing engines, and other pieces of software rely on them. 37 39 38 In the [[Image(source: /trunk/images/dialogs/propertiesdialog.png)]] [wiki:Help/Dialog/Properties Properties/Memberships Dialog] you can assign tags to an object, remove tags from an object, or edit assigned tags.40 In the [[Image(source:trunk/images/dialogs/propertiesdialog.png)]] [Dialog/Properties Properties Dialog] you can assign tags to an object, remove tags from an object, or edit assigned tags. 39 41 40 42 == Object ids == 41 43 The OSM server assigns each object a unique number, the '''object ID''' or '''OSM ID'''. A new object doesn't have an ID (it's ID is 0) until it is uploaded the first time to the OSM server. 44 45 === Display object ids in Toggle Dialogs === #DisplayObjectsIds 46 Under '''[Preferences Preferences] -> [Display Settings Display Settings] -> Look and Feel''' it is possible to en- or disable the display of objects ids in the toggle dialogs. 42 47 43 48 * TODO: how to enable displaying of object ids … … 48 53 Each object has a '''version'''. The '''version''' is incremented whenever the object is uploaded to the server and the OSM server not only stores the most recent version of an object, but it's complete '''history'''. 49 54 50 In the [[Image(source: /trunk/images/dialogs/history.png)]] [wiki:/Help/Dialog/History History Dialog] you can load the '''history''' of an object and launch the [wiki:/Help/Dialog/HistoryBrowser History Browser]. The History Browser will show you the '''versions''' of a particular object.55 In the [[Image(source:trunk/images/dialogs/history.png)]] [Dialog/History History Dialog] you can load the '''history''' of an object and launch the [Dialog/History#Workingwiththehistorybrowser History Browser]. The History Browser will show you the '''versions''' of a particular object. 51 56 52 Alternatively, [[Image(source: /trunk/images/about.png)]]''View->Object history'' redirect you to a page on the [http://www.openstreetmap.org OSM website] which displays the object history too.57 Alternatively, [[Image(source:trunk/images/about.png)]] '''''View -> Object history''''' redirect you to a page on the [http://www.openstreetmap.org OSM website] which displays the object history, too. 53 58 54 59 ---- 55 Back to [wiki:Help Main Help] 60 Back to [wiki:/Help Main Help]