Up to yesterday, for my Topic Maps REST server (tmipd) I have used startup and shutdown scripts to control it, quite in the Apache tradition:

On start, it would detach from the terminal and would daemonize.

When I created an experimental version of the Perl client RDF::AllegroGraph::Easy it worked against the AG server 3.1.1.

Since then some subtle changes occurred, so that I have upgraded the client to continue to work.

Franz Inc. has also provided me with a pre-release of AG 4.

Yes, I am cynical. But I am not cynical enough. Despair:

Category Economy

(continued from Part I)

When you need to integrate the generation of DZI image pyramids into your own infrastructure, you should look first at Graphics::DZI::Files and not its superclass Graphics::DZI.

The Conventional Use Case

Objects of this class expect foremost the image to be tiled:

As detailed in the manual page, you can add more parameters, such as tile size or the format.

If installed properly, the Graphics::DZI distribution should also contain a script deepzoom which can be used from the command line.

With it you can take an image (in any format ImageMagick can interpret) and generate the image pyramid as necessary for deep zooming with the Seadragon AJAX client.

This weekend I managed to package up Graphics::DZI. It is a naive implementation of the DeepZoom mechanism as used in Seadragon.

The API is not completely stable; first I will have to integrate the piece into my semantic map generation infrastructure.

I also need to better understand how to deal with very sparse maps.

(continued from Part II)

This week I have toyed around with ways to zoom in and out of the map. After some experimentation I ended up with Seadragon, a Microsoft acquisitioned technology.

Try it out yourself.

In a little side-project involving DeepZooming documents I needed to convert PDF documents into images, and that with a controllable quality.

Of course, the program convert (part of the trusty ImageMagick library) can do that:

It will not produce a single PNG, though, but one for each page, numbering them through.

Category Programming

(continued from Part I)

One of the questions you might rightfully ask, is how much impact the semantic network information within the topic map has on producing visualisations like those below:

Or how much they should have, as this is a parameter which I must control.