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Rationalize vocabulary

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- nodes
  - vertices
  - points
- ways
  - lines
  - areas
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John Firebaugh
2012-12-29 09:13:20 -08:00
parent d181df4c51
commit c927ff5b5d
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API.md
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@@ -26,21 +26,21 @@ elements we use in order to implement a particular visual style.
### Geometric classes
In addition to the OSM element vocabulary of nodes, ways, and relations, iD has
established a related geometric vocabulary consisting of points, lines, and areas.
established a related geometric vocabulary consisting of points, vertices, lines,
and areas.
A **point** is a node that is either not a member of any way, or has specific tags
that identify it as "interesting" in some way. For example, a node belonging to a
way may also be considered a point if it has a `traffic_signal` tag. Elements
representing points have a `.point` class. Since a point is always a node, they
also have a `.node` class. Nodes that are not points can be selected using
`.node:not(.point)` (TODO: come up with something better than that.)
A **point** is a node that is not a member of any way. Elements representing points
have a `.point` class. Since a point is always a node, they also have a `.node` class.
A **vertex** is a node that is a member of one or more ways. Elements representing
points have `.vertex` and `.node` classes.
A **line** is a way that is not an area. Elements representing lines have a `.line`
class. Since a line is also a way, they also have a `.way` class.
An **area** is a way that is circular, has certain tags, or lacks certain other
tags (see `iD.Way#isArea` for the exact definition). Elements representing areas
have an `.area` class. Since an area is also a way, they also have a `.way` class.
have `.area` and `.way` classes.
### Tag classes