Changes between Version 36 and Version 37 of Help/Concepts/Object

Timestamp:

2016-04-17T05:48:00+02:00 (10 years ago)

Author:

openstreetmap.org-user-d1g

Comment:

--

Help/Concepts/Object

@@ -3 +3 @@
 = Objects - The basic building blocks of OSM data and maps =
 
-JOSM helps you to enter data about real-world objects in the OSM geo-database. Despite the overwhelming 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**, [[Image(source:trunk/images/data/way.png,middle)]] **ways** and [[Image(source:trunk/images/data/relation.png,middle)]] **relations**.
+JOSM helps you to enter data about real-world objects in the OSM geo-database. Despite the overwhelming 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,nolink)]] **nodes**, [[Image(source:trunk/images/data/way.png,middle,nolink)]] **ways** and [[Image(source:trunk/images/data/relation.png,middle)]] **relations**.
 
 You can assign **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. 
@@ -11 +11 @@
 == Nodes, ways, and relations == #NodesWaysRelations
 === Nodes ===
-[[Image(source:trunk/images/data/node.png,20,bottom,margin-right=15)]] A **node** is an individual point with a defined position. 
+[[Image(source:trunk/images/data/node.png,20,bottom,margin-right=15,nolink)]] A **node** is an individual point with a defined position. 
 
 === Ways ===
-[[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.
+[[Image(source:trunk/images/data/way.png,20,middle,margin-right=15,margin-bottom=5,nolink)]] 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.
 
 ==== Closed Ways (Areas) ==== #ClosedWays
-[[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**. 
+[[Image(source:trunk/images/data/closedway.png,20,middle,margin-right=15,margin-bottom=5,nolink)]] If a **way** is closed, i.e. if the last node is the same as  the first node, it is also called an **area**. 
 
 === Relations ===
-[[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. 
+
+==== Simple explanation ====
+[[Image(source:trunk/images/data/relation.png,20,middle,margin-right=15,margin-bottom=5,nolink)]]  A **relation** is an sequence of other nodes and ways. 
+Every relation can have their own "tags".
+Relations can be used as members in other relations (nested or hierarchical structures).
+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. 
+
+
+There [http://wiki.openstreetmap.org/wiki/Types_of_relation many types of relations], but most popular are 
+
+===== type=multipolygon =====
+
+A water object (natural=water), a building (building=*) or administrative boundary (admin_level tag).
+
+(stub)
+
+===== type=route =====
+
+Used to describe bus routes and train routes along other transportation services.
+(stub)
 
 == Tags ==