[talk-au] MMBW plan dates

[keith maguire]

Hi Blue,

I've been experimenting with just that question over the last while,
prompted by when I first saw Google Maps Image Cutter.  Image Cutter can't
actually cope with big images (when stuck together the index plans make an
image over 300megabytes in size -- Image Cutter just kind of coughs and goes
silent) but gdal2tiles/maptiler http://www.maptiler.org/ can cope with
images up to multiple gigabytes, and can use georeferenced images.  I found
Openstreetmap because I needed an unencumbered source of data to
georeference maps for conversion with gdal2tiles/maptiler.

The difficulty comes with the most detailed layer of images.  They're not
neatly arranged and so would need to be individually georeferenced by hand
and then converted.  As I said there's over 2300 digitised at this stage so
you're talking a project which would take years.  Even combining the 26 or
so index plans into a single image was tricky until I found vips/nip2
http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS

So the kind of good news is that on my own desktop here I have a fully
functional openlayers "slippy map" of all the digitised index plans.  I've
also gotten the main plan and some of the index plans viewable as overlays
in Google Earth.  Hopefully I should be able at some stage to get something
added to the website -- however I'm just a graduate librarian, and I'm about
to leave the maps section so it might take me a while to convince people.  I
am working on it though!

Cheers

Keith



> Slightly off topic, but is there any chance the library could upgrade their
> web
> viewing system to be like OSM's slippy map or Google's? That is, a
> drag-able
> map with map tiles, leaving all of the work for the client, the libraries
> server
> would just have to host the tiles. I find the interface to the current
> system
> painful to use.
>
> A few links that might be useful are:
> OpenLayers http://openlayers.org/
> Google Maps Image Cutter
> http://www.casa.ucl.ac.uk/software/googlemapimagecutter.asp
>
> Not sure how the library does these kind of projects, but if resources are
> an
> issue, a student project at a University might help. I have a few contacts
> that
> may help.
>
> Cheers,
> BlueMM
>
>
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