Geo::GDAL  2.4
Transforming a dataset

The code here does not have any warranty. It is recommended that before using any of this code, you look into it and try to understand what it does, what input it needs, etc. Do not blindly execute anything!

This example will transform a vector dataset from spatial reference system EPSG 2392 to EPSG 2393. The geometries are translated by (dx, dy) = (2500000, 6600000) before applying the transformation.

$dsname = shift @ARGV;
$lname = shift @ARGV;
$datasource = Geo::OGR::Open($dsname) or die;
$layer1 = $datasource->Layer($lname) or die;
$sr1 = Geo::OSR::SpatialReference->new(EPSG => 2392);
$dsname = shift @ARGV;
$lname = shift @ARGV;
$datasource = Geo::OGR::Driver('ESRI Shapefile')->Create($dsname) or die;
$sr2 = Geo::OSR::SpatialReference->new(EPSG => 2393);
$layer2 = $datasource->CreateLayer
({ Name => $lname, SRS => $sr2, GeometryType => $layer1->GetLayerDefn->GeometryType});
$layer2->Schema( $layer1->Schema );
$tr = Geo::OSR::CoordinateTransformation->new($sr1, $sr2) or die;
$layer1->ResetReading();
while ($feature = $layer1->GetNextFeature()) {
my $geom = $feature->GetGeometry();
$geom->Move(2500000, 6600000);
$geom->Transform($tr);
$layer2->InsertFeature($feature);
}
GDAL utility functions and a root class for raster classes.
Definition: all.pm:15
public method Open()
public method Driver()
An object for transforming from one projection to another.
Definition: all.pm:18212
public Geo::OSR::CoordinateTransformation new(scalar src, scalar dst)
A spatial reference system.
Definition: all.pm:18374
public Geo::OSR::SpatialReference new(hash params)