程序包 org.locationtech.jts.io.geojson

类 GeoJsonReader

java.lang.Object

org.locationtech.jts.io.geojson.GeoJsonReader

public class GeoJsonReader
extends java.lang.Object

Reads a GeoJson Geometry from a JSON fragment into a Geometry.

A specification of the GeoJson format can be found at the GeoJson web site: http://geojson.org/geojson-spec.html.

It is the caller's responsibility to ensure that the supplied PrecisionModel matches the precision of the incoming data. If a lower precision for the data is required, a subsequent process must be run on the data to reduce its precision.

作者:

Martin Davis, Paul Howells, Vivid Solutions.

构造器概要

构造器

构造器	说明
GeoJsonReader()	The default constructor uses the SRID from the Geojson CRS and the default PrecisionModel to create a GeometryFactory.
GeoJsonReader(org.locationtech.jts.geom.GeometryFactory geometryFactory)	This constructor accepts a GeometryFactory that is used to create the output geometries and to override the GeoJson CRS.

方法概要

限定符和类型	方法	说明
org.locationtech.jts.geom.Geometry	read(java.io.Reader reader)	Reads a GeoJson Geometry from a Reader into a single Geometry.
org.locationtech.jts.geom.Geometry	read(java.lang.String json)	Reads a GeoJson Geometry from a String into a single Geometry.

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

GeoJsonReader

public GeoJsonReader()

The default constructor uses the SRID from the Geojson CRS and the default PrecisionModel to create a GeometryFactory. If there is no CRS specified then the default CRS is a geographic coordinate reference system, using the WGS84 datum, and with longitude and latitude units of decimal degrees (SRID = 4326)

GeoJsonReader

public GeoJsonReader(org.locationtech.jts.geom.GeometryFactory geometryFactory)

This constructor accepts a GeometryFactory that is used to create the output geometries and to override the GeoJson CRS.

参数:

geometryFactory - a GeometryFactory

方法详细资料

read

public org.locationtech.jts.geom.Geometry read(java.lang.String json)
                                        throws org.locationtech.jts.io.ParseException

Reads a GeoJson Geometry from a String into a single Geometry.

参数:

json - The GeoJson String to parse

返回:

the resulting JTS Geometry

抛出:

org.locationtech.jts.io.ParseException - throws a ParseException if the JSON string cannot be parsed

read

public org.locationtech.jts.geom.Geometry read(java.io.Reader reader)
                                        throws org.locationtech.jts.io.ParseException

Reads a GeoJson Geometry from a Reader into a single Geometry.

参数:

reader - The input source

返回:

The resulting JTS Geometry

抛出:

org.locationtech.jts.io.ParseException - throws a ParseException if the JSON string cannot be parsed