postgis-workshop/geometries — Chinese (Simplified) @ OSGeo Weblate: Well-known text (:term:`WKT`)

Zen

	English	Chinese (Simplified)	Actions
	Collections	集合
	There are four collection types, which group multiple simple geometries into sets.	有四种集合类型，它们将多个简单几何图形分组成集合。
	MultiPoint, a collection of points	MultiPoint，一组点
	MultiLineString, a collection of linestrings	MultiLineString，一组线串
	MultiPolygon, a collection of polygons	MultiPolygon，一组多边形
	GeometryCollection, a heterogeneous collection of any geometry (including other collections)	GeometryCollection，任何几何图形的异构集合（包括其他集合）
	Collections are another concept that shows up in GIS software more than in generic graphics software. They are useful for directly modeling real world objects as spatial objects. For example, how to model a lot that is split by a right-of-way? As a MultiPolygon, with a part on either side of the right-of-way.	集合是在GIS软件中出现的另一个概念，而不是在通用图形软件中。它们对于直接建模实际世界对象作为空间对象非常有用。例如，如何对被权利赋予的路划分的土地进行建模？作为一个MultiPolygon，在权利赋予的路的两侧各有一部分。
	Our example collection contains a polygon and a point:	我们的示例集合包含一个多边形和一个点:
	Some of the specific spatial functions for working with collections are:	一些用于处理集合的特定空间函数包括:
	:command:`ST_NumGeometries(geometry)` returns the number of parts in the collection	:command:`ST_NumGeometries(geometry)` 返回集合中的部分数量
	:command:`ST_GeometryN(geometry,n)` returns the specified part	:command:`ST_GeometryN(geometry,n)` 返回指定的部分
	:command:`ST_Area(geometry)` returns the total area of all polygonal parts	:command:`ST_Area(geometry)` 返回所有多边形部分的总面积
	:command:`ST_Length(geometry)` returns the total length of all linear parts	:command:`ST_Length(geometry)` 返回所有线性部分的总长度
	Geometry Input and Output	几何的输入输出
	Within the database, geometries are stored on disk in a format only used by the PostGIS program. In order for external programs to insert and retrieve useful geometries, they need to be converted into a format that other applications can understand. Fortunately, PostGIS supports emitting and consuming geometries in a large number of formats:	在数据库中，几何图形以一种仅由PostGIS程序使用的格式存储在磁盘上。为了让外部程序插入和检索有用的几何图形，它们需要转换成其他应用程序能够理解的格式。幸运的是，PostGIS支持在大量格式中发出和消耗几何图形:
	Well-known text (:term:`WKT`)	Well-known text (:term:`WKT`)
	:command:`ST_GeomFromText(text, srid)` returns ``geometry``	:command:`ST_GeomFromText(text, srid)` 返回 ``geometry``
	:command:`ST_AsText(geometry)` returns ``text``	:command:`ST_AsText(geometry)` 返回 ``text``
	:command:`ST_AsEWKT(geometry)` returns ``text``	:command:`ST_AsEWKT(geometry)` 返回 ``text``
	Well-known binary (:term:`WKB`)	Well-known binary (:term:`WKB`)
	:command:`ST_GeomFromWKB(bytea)` returns ``geometry``	:command:`ST_GeomFromWKB(bytea)` 返回 ``geometry``
	:command:`ST_AsBinary(geometry)` returns ``bytea``	:command:`ST_AsBinary(geometry)` 返回 ``bytea``
	:command:`ST_AsEWKB(geometry)` returns ``bytea``	:command:`ST_AsEWKB(geometry)` 返回 ``bytea``
	Geographic Mark-up Language (:term:`GML`)	Geographic Mark-up Language (:term:`GML`)
	:command:`ST_GeomFromGML(text)` returns ``geometry``	:command:`ST_GeomFromGML(text)` 返回 ``geometry``
	:command:`ST_AsGML(geometry)` returns ``text``	:command:`ST_AsGML(geometry)` 返回 ``text``
	Keyhole Mark-up Language (:term:`KML`)	Keyhole Mark-up Language (:term:`KML`)
	:command:`ST_GeomFromKML(text)` returns ``geometry``	:command:`ST_GeomFromKML(text)` 返回 ``geometry``
	:command:`ST_AsKML(geometry)` returns ``text``	:command:`ST_AsKML(geometry)` 返回 ``text``
	:term:`GeoJSON`	:term:`GeoJSON`
	:command:`ST_AsGeoJSON(geometry)` returns ``text``	:command:`ST_AsGeoJSON(geometry)` 返回 ``text``