Changes between Version 21 and Version 22 of Help/Concepts/Object


Ignore:
Timestamp:
2013-10-27T17:22:16+01:00 (12 years ago)
Author:
skyper
Comment:

better placement of images + link updates

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  • Help/Concepts/Object

    v21 v22  
    33= Objects - The basic building blocks of OSM data and maps =
    44
    5 JOSM helps you to enter data about real-world objects in the OSM geo-database. Despite the overhelming complexity of real-world objects you can map, JOSM provides only three kinds of objects as basic building blocks for maps: [[Image(source:trunk/images/data/node.png)]] **[#Nodes nodes]**, [[Image(source:trunk/images/data/way.png)]] **[#Ways ways]** and [[Image(source:trunk/images/data/relation.png)]] **[#Relations relations]**.
     5JOSM helps you to enter data about real-world objects in the OSM geo-database. Despite the overhelming complexity of real-world objects you can map, JOSM provides only three kinds of objects as basic building blocks for maps: [[Image(source:trunk/images/data/node.png,top)]] **[#Nodes nodes]**, [[Image(source:trunk/images/data/way.png,middle)]] **[#Ways ways]** and [[Image(source:trunk/images/data/relation.png,middle)]] **[#Relations relations]**.
    66
    77You can assign **[#Tags tags]** to objects. It's the assigned set of tags which makes a node representing a restaurant different from a node representing a church, or a way representing a residential road different from a ways representing a river, or a relation representing a bus route different from a relation representing a cycling route.
    … …  
    1111== Nodes, ways, and relations == #NodesWaysRelations
    1212=== Nodes ===
    13 [[Image(source:trunk/images/data/node.png,20)]] A **node** is an individual point with a defined position.
     13[[Image(source:trunk/images/data/node.png,20,bottom,margin-right=15)]] A **node** is an individual point with a defined position.
    1414
    1515=== Ways ===
    16 [[Image(source:trunk/images/data/way.png,20)]] A **way** is a sequence of nodes. Despite its name a way doesn't represent ways in the real-world only. An OSM [[Image(source:trunk/images/data/way.png)]] **way** is also used to represent a river, the boundaries of a country, or even a building.
     16[[Image(source:trunk/images/data/way.png,20,middle,margin-right=15,margin-bottom=5)]] 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.
    1717
    1818==== Closed Ways (Areas) ==== #ClosedWays
    19 [[Image(source:trunk/images/data/closedway.png,20)]] If a **way** is closed, i.e. if the last node is the same as  the first node, it is also called an **area**.
     19[[Image(source:trunk/images/data/closedway.png,20,middle,margin-right=15,margin-bottom=5)]] If a **way** is closed, i.e. if the last node is the same as  the first node, it is also called an **area**.
    2020
    2121=== Relations ===
    22 [[Image(source:trunk/images/data/relation.png,20)]] 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 `platform` for platforms related to according stop positions.
     22[[Image(source:trunk/images/data/relation.png,20,middle,margin-right=15,margin-bottom=5)]] 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 `platform` for platforms related to according stop positions.
    2323
    2424== Tags ==
    … …  
    4242Assigned to a way, this set of **tags** indicate, that the way represents a living street with name ''Main road'' (the German name be ''Hauptstrasse'', the English name, which in this example equals to name, is ''Main road''). Speed is limited to 30km/h and heavy goods vehicles (hgv) are not allowed. Furthermore, it's a one way street.
    4343
    44 You are free to assign an object whatever tag you feel necessary. However, there is a list of so called [https://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.
     44You are free to assign an object whatever tag you feel necessary. However, there is a list of so called [osmwiki: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.
    4545
    46 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.
     46In the [[Image(source:trunk/images/dialogs/propertiesdialog.png,18,middle)]] [Dialog/TagsMembership Tags/Membership Dialog] you can assign tags to an object, remove tags from an object, or edit assigned tags.
    4747
    4848== Object ids ==
    4949The 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.
    50 * Under **''Preferences -> [[Image(source:trunk/images/preferences/display.png,20)]] [Preferences/Display Display Settings] -> Look and Feel''** it is possible to en- or disable the display of objects ids in the toggle dialogs.
    51 * With **''File -> [[Image(source:trunk/images/downloadprimitive.png)]] [Action/DownloadObject Download object ...]''** it is possible to download **objects** by Ids.
    52 * **''View -> [[Image(source:trunk/images/about.png)]] [Action/InfoAboutElements Advanced info]''** opens seperated windows with informations about selected objects in text format.
    53 * **''View -> [[Image(source:trunk/images/about.png)]] [Action/InfoAboutElementsWeb Advanced info (web)]''** opens the **objects' pages** of selected objects on the [http://www.openstreetmap.org OSM website] in your web browser.
     50* Under **''Preferences -> [[Image(source:trunk/images/preferences/display.png,18,middle)]] [Preferences/Display Display Settings] -> Look and Feel''** it is possible to en- or disable the display of objects ids in the toggle dialogs.
     51* With **''File -> [[Image(source:trunk/images/downloadprimitive.png,18,bottom)]] [Action/DownloadObject Download object ...]''** it is possible to download **objects** by Ids.
     52* **''View -> [[Image(source:trunk/images/about.png,18,bottom)]] [Action/InfoAboutElements Advanced info]''** opens seperated windows with informations about selected objects in text format.
     53* **''View -> [[Image(source:trunk/images/about.png,18,bottom)]] [Action/InfoAboutElementsWeb Advanced info (web)]''** opens the **objects' pages** of selected objects on the [osm: OSM website] in your web browser.
    5454
    5555Alternatively, you can browse the objects directly by entering following address in your web browser:
    … …  
    6262Each 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**.
    6363
    64 * **''View -> [[Image(source:trunk/images/about.png)]] [Action/ObjectHistory History]''** opens the [Dialog/History#Workingwiththehistorybrowser History Browser]. The History Browser will show you the **versions** of a particular object.
    65 * Alternatively, **''View -> [[Image(source:trunk/images/about.png)]] [Action/ObjectHistoryWeb History (web)]''** opens a page on the [https://www.openstreetmap.org OSM website] in your web browser which displays the object history, too.
    66 * 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].
     64* **''View -> [[Image(source:trunk/images/about.png,18,bottom)]] [Action/ObjectHistory History]''** opens the [Dialog/History#Workingwiththehistorybrowser History Browser]. The History Browser will show you the **versions** of a particular object.
     65* Alternatively, **''View -> [[Image(source:trunk/images/about.png,18,bottom)]] [Action/ObjectHistoryWeb History (web)]''** opens a page on the [https://www.openstreetmap.org OSM website] in your web browser which displays the object history, too.
     66* In the [[Image(source:trunk/images/dialogs/history.png,18,bottom)]] [Dialog/History History Dialog] you can load the **history** of an object and launch the [Dialog/History#Workingwiththehistorybrowser History Browser].
    6767
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