Geo::GDAL  2.4
Geo::OGR::Feature Class Reference

A collection of non-spatial and spatial attributes.
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+ Inheritance diagram for Geo::OGR::Feature:
+ Collaboration diagram for Geo::OGR::Feature:

Public Member Functions

public Geo::OGR::Feature Clone ()
 
public method DumpReadable ()
 
public scalar Equal (scalar feature)
 
public scalar FID (scalar id)
 Get or set the id of this feature.
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public method Field (scalar name, scalar value,...)
 Get, set, or unset the field value.
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public method FillUnsetWithDefault ()
 
public method Geometry (scalar name, scalar geometry)
 Get or set the value of a geometry field.
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public Geo::OGR::FeatureDefn GetDefn ()
 
public scalar GetFID ()
 
public list GetField (scalar name)
 
public scalar GetFieldDefn (scalar name)
 
public list GetFieldNames ()
 
public scalar GetGeomFieldDefn (scalar name)
 
public method GetNativeData ()
 
public method GetNativeMediaType ()
 
public hash reference GetSchema ()
 Get the schema of this feature.

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public scalar GetStyleString ()
 
public method IsFieldNull ()
 
public method IsFieldSetAndNotNull ()
 
public Geo::OGR::Layer Layer ()
 
public hash reference Row (hash row)
 
public method SetFID (scalar id)
 
public method SetField (scalar name, array Value)
 
public method SetFieldNull ()
 
public method SetFrom (scalar other, scalar forgiving=1, hashref map)
 
public method SetNativeData ()
 
public method SetNativeMediaType ()
 
public method SetStyleString (scalar string)
 
public list Tuple (array tuple)
 
public scalar Validate (list flags)
 
public Geo::OGR::Feature new (hash schema)
 Create a new feature.
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- Public Member Functions inherited from Geo::OGR
public list ByteOrders ()
 
public Geo::GDAL::Driver Driver (scalar name)
 
public list DriverNames ()
 
public list Drivers ()
 
public method Flatten ()
 
public scalar GeometryTypeModify (scalar type, scalar modifier)
 
public scalar GeometryTypeTest (scalar type, scalar test, scalar type2)
 
public list GeometryTypes ()
 
public method GetNonLinearGeometriesEnabledFlag ()
 
public method GetOpenDSCount ()
 
public method HasM ()
 
public method HasZ ()
 
public Geo::GDAL::Dataset Open (scalar name, scalar update=0)
 
public Geo::GDAL::Dataset OpenShared (scalar name, scalar update=0)
 
public method SetGenerate_DB2_V72_BYTE_ORDER (scalar Generate_DB2_V72_BYTE_ORDER)
 
public method SetNonLinearGeometriesEnabledFlag ()
 

Detailed Description

A collection of non-spatial and spatial attributes.

A feature is a collection of non-spatial and spatial attributes and
an id, which is a special attribute, and data records according to
this data model. Attributes are called fields and some fields are
spatial, i.e., their value is a geometry. Fields have at least a
name and a type. Features may exist within a layer or
separetely. The data model of a feature is a definition object.

Definition at line 8473 of file all.dox.

Member Function Documentation

public Geo::OGR::Feature Geo::OGR::Feature::Clone ( )

Object method.

Returns
a new Geo::OGR::Feature object

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public method Geo::OGR::Feature::DumpReadable ( )

Object method.
Write the contents of this feature to stdout.

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public scalar Geo::OGR::Feature::Equal ( scalar  feature)

Object method.

Parameters
featurea Geo::OGR::Feature object for comparison
Returns
boolean

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public scalar Geo::OGR::Feature::FID ( scalar  id)

Get or set the id of this feature.

Object method.

Parameters
id[optional] the id to set for this feature.
Returns
integer the id of this feature.

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public method Geo::OGR::Feature::Field ( scalar  name,
scalar  value,
  ... 
)

Get, set, or unset the field value.

Object method.

Parameters
namethe name (or the index) of the field.
valuea scalar, a list of scalars or a reference to a
list. If undef, the field is unset. If a scalar or a list of
scalars, the field is set from them.
Note
Non-scalar fields (for example Date) can be set either from a
scalar, which is then assumed to be a string and parsed, or from a
list of values (for example year, month, day for Date).
Setting and getting Integer64 fields requires 'use bigint' if
$Config{ivsize} is smaller than 8, i.e., in a 32 bit machine.
Returns
in non-void context the value of the field, which may be a
scalar or a list, depending on the field type. For unset fields the
undef value is returned.

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public method Geo::OGR::Feature::FillUnsetWithDefault ( )


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public method Geo::OGR::Feature::Geometry ( scalar  name,
scalar  geometry 
)

Get or set the value of a geometry field.

Object method.

Note
This method delivers the functionality of undocumented methods
SetGeometry($geometry), SetGeometryDirectly, SetGeomField,
SetGeomFieldDirectly, GetGeometry, GetGeometryRef.

Set or get the geometry in the feature. When setting, does a check
against the schema (GeometryType) of the feature. If the parameter
is a geometry object, it is cloned.
Parameters
name[optional] the name of the spatial field,
whose geometry is to be set. If not given, sets or gets the geometry
of the first (or the single) spatial field.
geometry[optional] a Geo::OGR::Geometry object or a
reference to a hash from which such can be created (using
Geo::OGR::Geometry::new).
Returns
in a non-void context the indicated geometry in the feature
as a Geo::OGR::Geometry object. The returned object contains a
reference to the actual geometry data in the feature (the geometry
is not cloned) and to the feature object, thus keeping the feature
object from being destroyed while the geometry object exists.

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public Geo::OGR::FeatureDefn Geo::OGR::Feature::GetDefn ( )

Object method.

Note
A.k.a GetDefnRef.
Returns
a Geo::OGR::FeatureDefn object, which represents the definition of this feature.

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public scalar Geo::OGR::Feature::GetFID ( )

Object method.

Returns
the feature id (an integer).

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public list Geo::OGR::Feature::GetField ( scalar  name)

Object method.
See Field().

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public scalar Geo::OGR::Feature::GetFieldDefn ( scalar  name)

Object method.
Get the definition of a field.

Parameters
namethe name of the field.
Returns
a Geo::OGR::FieldDefn object.

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public list Geo::OGR::Feature::GetFieldNames ( )

Object method.
Get the names of the fields in this feature.

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public scalar Geo::OGR::Feature::GetGeomFieldDefn ( scalar  name)

Object method.
Get the definition of a spatial field.

Parameters
namethe name of the spatial field.
Returns
a Geo::OGR::GeomFieldDefn object.

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public method Geo::OGR::Feature::GetNativeData ( )


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public method Geo::OGR::Feature::GetNativeMediaType ( )


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public hash reference Geo::OGR::Feature::GetSchema ( )

Get the schema of this feature.

Object method.

Returns
the schema as a hash whose keywords are Name, StyleIgnored
and Fields. Fields is an anonymous array of first non-spatial and
then spatial field schemas as in Geo::OGR::FieldDefn::Schema() and
Geo::OGR::GeomFieldDefn::Schema().

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public scalar Geo::OGR::Feature::GetStyleString ( )

Object method.

Returns
a string

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public method Geo::OGR::Feature::IsFieldNull ( )


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public method Geo::OGR::Feature::IsFieldSetAndNotNull ( )


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Object method.

Returns
the layer to which this feature belongs to or undef.

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public Geo::OGR::Feature Geo::OGR::Feature::new ( hash  schema)

Create a new feature.

Class method.

Parameters
Namedparameters:
- Schema a reference to a schema hash, or a Geo::OGR::Layer,
Geo::OGR::Feature, or Geo::OGR::FeatureDefn object.
- Values values for the feature attributes.
- StyleIgnored whether the style can be omitted when fetching
features. (default is false)

Schema is a hash with the following keys:
- Name name of the schema (not used).
- Fields a list of Geo::OGR::FieldDefn or Geo::OGR::GeomFieldDefn
objects or references to hashes from which fields can be created.
- GeometryType the geometry type if the feature has only one spatial field.

Note
Do not mix GeometryType and geometry fields in Fields list.
Old syntax where the argument is a Geo::OGR::FeatureDefn
object or Schema hash is supported.

Returns
a new Geo::OGR::Feature object.

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public hash reference Geo::OGR::Feature::Row ( hash  row)

Object method.

Note
This method discards the data the destination feature (or
layer) does not support. Changes in data due to differences between
field types may also occur.

Get and/or set the data of the feature. The key of the (key,value)
pairs of the row is the field name. Special field names FID and
Geometry are used for feature id and (single) geometry
respectively. The geometry/ies is/are set and get using the
Geo::OGR::Feature::Geometry method. Field values are set using the
Geo::OGR::Feature::Field method.
Parameters
row[optional] feature data in a hash.
Returns
a reference to feature data in a hash. Spatial fields are
returned as Geo::OGR::Geometry objects.

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public method Geo::OGR::Feature::SetFID ( scalar  id)

Object method.

Parameters
idthe feature id.

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public method Geo::OGR::Feature::SetField ( scalar  name,
array  Value 
)

Object method.
See Field().

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public method Geo::OGR::Feature::SetFieldNull ( )


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public method Geo::OGR::Feature::SetFrom ( scalar  other,
scalar  forgiving = 1,
hashref  map 
)

Object method.

Parameters
othera Geo::OGR::Feature object
forgiving[optional] set to false if the operation should not
continue if output fields do not match some of the source fields
map[optional] a mapping from output field indexes to source
fields, include into the hash all field indexes of this feature
which should be set

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public method Geo::OGR::Feature::SetNativeData ( )


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public method Geo::OGR::Feature::SetNativeMediaType ( )


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public method Geo::OGR::Feature::SetStyleString ( scalar  string)

Object method.

Parameters
string

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public list Geo::OGR::Feature::Tuple ( array  tuple)

Object method.

Note
This method discards the data the destination feature (or
layer) does not support. Changes in data due to differences between
field types may also occur.

The schema of the tuple needs to be the same as that of the
feature.

Get and/set the data of the feature. The expected data in the tuple
is ([feature_id,] non-spatial fields, spatial fields). The fields in
the tuple are in the order they are in the schema. Field values are
set using the Geo::OGR::Feature::Field method. Geometries are set
and get using the Geo::OGR::Feature::Geometry method.
Parameters
tuple[optional] feature data in an array
Returns
feature data in an array

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public scalar Geo::OGR::Feature::Validate ( list  flags)

Object method.

Parameters
flagsone of more of null, geom_type, width,
allow_null_when_default, or all.
Exceptions
croakswith an error message if the feature is not valid.
Returns
integer denoting the validity of the feature object.

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The documentation for this class was generated from the following file: