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Manual Reference Pages  -  GEO::JSON::CRS (3)

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NAME

Geo::JSON::CRS - Co-ordinate Reference System object

CONTENTS

SYNOPSIS



    use Geo::JSON::CRS;
   
    # A named CRS
    my $wgs84 = Geo::JSON::CRS->new(
        {   type       => name,
            properties => { name => urn:ogc:def:crs:OGC:1.3:CRS84 }
        }
    );
    # older formats are also possible, e.g. "urn:ogc:def:crs:EPSG::4326"
   
    # A linked CRS
    my $crs = Geo::JSON::CRS->new(
        {   type       => link,
            properties => {
                href => http://example.com/crs/42,
                type => proj4
            }
        }
    );
   
    # A relative link
    my $crs = Geo::JSON::CRS->new(
        {   type       => link,
            properties => {
                href => data.crs,
                type => ogcwkt
            }
        }
    );



DESCRIPTION

Perl class to represent a Coordinate Reference System object. The default GeoJSON CRS is a geographic coordinate reference system, using the WGS84 datum, and with longitude and latitude units of decimal degrees.

Set a CRS value on a GeoJSON object to change this.

See Geo::JSON for more details.

ATTRIBUTES

    type

Either ’name’ or ’link’

    properties

Hashref.

For objects of type ’name’, a ’name’ key is required, the value being a string identifying the CRS.

For objects of type ’link’, ’href’ and ’type’ keys are required. Link types are not restricted, examples include proj4, ogcwkt, esriwkt,

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perl v5.20.3 GEO::JSON::CRS (3) 2015-02-16

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