Geo::OSM::Render::Viewport - Project OSM latitudes and longitudes into x, y coordinate pairs to be rendered by Geo::OSM::Render.
This is an abstract base class. So, I am hard pressed to write a synopsis here.
After projecting OSM coordinates onto a coordinate system with Geo::OSM::Render::Projection, the resulting coordinates migth be translated onto the coordinate system of the map. This can be done with an instance of viewport.
viewport
my $vp = Geo::OSM::Render::Viewport->new();
Create an instance of a viewport. Use it in a derived class.
my ($map_x, $map_y) = $vp->x_y_to_map_x_y($x, $$y);
Because this is an abstract base class, calling this method on <Geo::OSM::Render::Viewport> just croaks.
<Geo::OSM::Render::Viewport
René Nyffenegger <rene.nyffenegger at adp-gmbh.ch>
This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at: http://www.perlfoundation.org/artistic_license_2_0
The source code is on github. Meaningful pull requests are welcome.
To install Geo::OSM::Render, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Geo::OSM::Render
CPAN shell
perl -MCPAN -e shell install Geo::OSM::Render
For more information on module installation, please visit the detailed CPAN module installation guide.