ZOO.Format.GeoJSON¶

Read and write GeoJSON.

Inherits from

ZOO.Format.JSON

Properties¶

NAME	DESCRIPTION
ZOO.Format.GeoJSON	Create a new parser for GeoJSON.
read	Deserialize a GeoJSON string.
isValidType	Check if a GeoJSON object is a valid representative of the given type.
parseFeature	Convert a feature object from GeoJSON into an ZOO.Feature.
parseGeometry	Convert a geometry object from GeoJSON into an ZOO.Geometry.

parseCoords Properties¶

NAME	DESCRIPTION
parseCoords	Object with properties corresponding to the GeoJSON geometry types.

parseCoords Functions¶

NAME	DESCRIPTION
parseCoords.point	Convert a coordinate array from GeoJSON into an ZOO.Geometry.Point.
parseCoords.multipoint	Convert a coordinate array from GeoJSON into an ZOO.Geometry.MultiPoint.
parseCoords.linestring	Convert a coordinate array from GeoJSON into an ZOO.Geometry.LineString.
parseCoords.multilinestring	Convert a coordinate array from GeoJSON into an ZOO.Geometry.MultiLineString.
parseCoords.polygon	Convert a coordinate array from GeoJSON into an ZOO.Geometry.Polygon.
parseCoords.multipolygon	Convert a coordinate array from GeoJSON into an ZOO.Geometry.MultiPolygon.
parseCoords.box	Convert a coordinate array from GeoJSON into an ZOO.Geometry.Polygon.
write	Serialize a feature, geometry, array of features into a GeoJSON string.
createCRSObject	Create the CRS object for an object.

extract Properties¶

NAME	DESCRIPTION
extract	Object with properties corresponding to the GeoJSON types.

extract Functions¶

NAME	DESCRIPTION
extract.feature	Return a partial GeoJSON object representing a single feature.
extract.geometry	Return a GeoJSON object representing a single geometry.
extract.point	Return an array of coordinates from a point.
extract.multipoint	Return an array of coordinates from a multipoint.
extract.linestring	Return an array of coordinate arrays from a linestring.
extract.multilinestring	Return an array of linestring arrays from a linestring.
extract.polygon	Return an array of linear ring arrays from a polygon.
extract.multipolygon	Return an array of polygon arrays from a multipolygon.
extract.collection	Return an array of geometries from a geometry collection.

Functions

ZOO.Format.GeoJSON

Create a new parser for GeoJSON.

Parameters

options {Object} An optional object whose properties will be set on this instance.

read

read: function(json,type,filter)

Deserialize a GeoJSON string.

Parameters

json {String} A GeoJSON string
type {String} Optional string that determines the structure of the output.  Supported values are “Geometry”, “Feature”, and “FeatureCollection”.  If absent or null, a default of “FeatureCollection” is assumed.
filter {Function} A function which will be called for every key and value at every level of the final result.  Each value will be replaced by the result of the filter function.  This can be used to reform generic objects into instances of classes, or to transform date strings into Date objects.

Returns

{Object} The return depends on the value of the type argument. If type is “FeatureCollection” (the default), the return will be an array of ZOO.Feature. If type is “Geometry”, the input json must represent a single geometry, and the return will be an ZOO.Geometry. If type is “Feature”, the input json must represent a single feature, and the return will be an ZOO.Feature.

isValidType

isValidType: function(obj,type)

Check if a GeoJSON object is a valid representative of the given type.

Returns

{Boolean} The object is valid GeoJSON object of the given type.

parseFeature

parseFeature: function(obj)

Convert a feature object from GeoJSON into a ZOO.Feature.

Parameters

obj {Object} An object created from a GeoJSON object

Returns

{ZOO.Feature} A feature.

parseGeometry

parseGeometry: function(obj)

Convert a geometry object from GeoJSON into a ZOO.Geometry.

Parameters

obj {Object} An object created from a GeoJSON object

Returns

{ZOO.Geometry} A geometry.

parseCoords Properties

parseCoords: Object with properties corresponding to the GeoJSON geometry types. Property values are functions that do the actual parsing.

parseCoords Functions

parseCoords.point

Convert a coordinate array from GeoJSON into a ZOO.Geometry.Point.

Parameters