NAME

Geo::GDAL::FFI::Layer - A collection of vector features in GDAL

SYNOPSIS

DESCRIPTION

A set of (vector) features having a same schema (the same Defn object). Obtain a layer object by the CreateLayer or GetLayer method of a vector dataset object.

METHODS

GetDefn

 my $defn = $layer->GetDefn;

Returns the FeatureDefn object for this layer.

ResetReading

 $layer->ResetReading;

GetNextFeature

 my $feature = $layer->GetNextFeature;

GetFeature

 my $feature = $layer->GetFeature($fid);

SetFeature

 $layer->SetFeature($feature);

CreateFeature

 $layer->CreateFeature($feature);

DeleteFeature

 $layer->DeleteFeature($fid);

GetExtent $layer->GetExtent(); $layer->GetExtent(1);

Returns an array ref with [minx, miny, maxx, maxy]. Argument is a boolean to force calculation even if it is expensive.

Intersection, Union, SymDifference, Identity, Update, Clip, Erase

 $result = $layer-><Method>($method, $args);

Runs the <method> algorithm between layer and method layer. Named arguments are the following.

"Result": Optional, allows the user to define the result layer.
"Options": Optional, allows the user to define the options (see GDAL docs).
"Progress": Optional, the progress indicator callback.
"ProgressData": Optional, data for the progress callback.

LICENSE

This software is released under the Artistic License. See perlartistic.

AUTHOR

Ari Jolma - Ari.Jolma at gmail.com