Geo::Surface(3pm)

Usage

 my $island = Geo::Surface->new($outer, $lake1, $lake2);

Inheritance

 Geo::Surface
   is a Geo::Shape

Overview

In this context, a "surface" is defined as a single filled area with possible enclosures in one projection system.

Extends "DESCRIPTION" in Geo::Shape.

Methods

Extends "METHODS" in Geo::Shape.

Constructors

Extends "Constructors" in Geo::Shape.

$obj->new( <$surface | <$outer,$inner,...> >, %options )

Geo::Surface->new( <$surface | <$outer,$inner,...> >, %options )

When called as instance method, some defaults are copied from the object where the call is made upon.

You may either provide a Math::Polygon::Surface $surface, or a LIST of lines. In the latter case, the first line is the $outer polygon of the surface, and the other are all $inner enclosures: lakes. Lines are and Geo::Line, Math::Polygon objects, or ARRAY of points.

If no projection is specified, then the projection of the first Geo-encoded line will be used.

 -Option--Defined in--Default
  proj    Geo::Shape  see Geo::Proj::defaultProjection()

proj => LABEL

Attributes

Extends "Attributes" in Geo::Shape.

`$obj->geoInner()`	Returns a LIST of enclosed polygons, converted to Geo::Line objects.
`$obj->geoOuter()`	Returns the outer polygon as Geo::Line object.
`$obj->inner()`	Returns a LIST of enclosed Math::Polygon objects.
`$obj->outer()`	Returns the outer Math::Polygon.
`$obj->proj()`	Inherited, see "Attributes" in Geo::Shape
`$obj->proj4()`	Inherited, see "Attributes" in Geo::Shape

Projections

Extends "Projections" in Geo::Shape.

`$obj->in( <$label\|'utm'> )`	Inherited, see "Projections" in Geo::Shape
`$obj->projectOn($nick, @points)`	Inherited, see "Projections" in Geo::Shape

Geometry

Extends "Geometry" in Geo::Shape.

$obj->area(): Returns the area enclosed by the outer polygon, minus the erea of the enclosures. Only useful when the points are in some orthogonal projection.

$obj->bbox(): The bounding box of outer surface polygon.

$obj->bboxCenter(): Inherited, see "Geometry" in Geo::Shape

$obj->bboxRing( [$xmin, $ymin, $xmax, $ymax, [$proj]] )

Geo::Surface->bboxRing( [$xmin, $ymin, $xmax, $ymax, [$proj]] ): Inherited, see "Geometry" in Geo::Shape

$obj->distance( $object, [$unit] ): Inherited, see "Geometry" in Geo::Shape

$obj->perimeter(): The length of the outer polygon. Only useful in a orthogonal coordinate systems.

Display

Extends "Display" in Geo::Shape.

$obj->deg2dm($degrees, $pos, $neg)

Geo::Surface->deg2dm($degrees, $pos, $neg): Inherited, see "Display" in Geo::Shape

$obj->deg2dms($degrees, $pos, $neg)

Geo::Surface->deg2dms($degrees, $pos, $neg): Inherited, see "Display" in Geo::Shape

$obj->dms2deg($dms)

Geo::Surface->dms2deg($dms): Inherited, see "Display" in Geo::Shape

$obj->toString( [$projection] ): Returns a string representation of the line, which is also used for stringification.

Overload

Extends "OVERLOAD" in Geo::Shape.

`overload: '""' (stringification)`	Inherited, see "OVERLOAD" in Geo::Shape
`overload: 'bool' (truth value)`	Inherited, see "OVERLOAD" in Geo::Shape

Diagnostics

Warning: Geo::Line is should be filled: When Geo::Line objects are used to compose a surface, each of them must be filled. Representation of rivers and such do not belong in a surface description.

Error: distance calculation not implemented between a $kind and a $kind: Only a subset of all objects can be used in the distance calculation. The limitation is purely caused by lack of time to implement this.

Error: in() not implemented for a $class

Error: not known what to do with $component

Releases

4 releases since Debian 7 (Wheezy); the text changed 3 times.

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