[Live-demo] how much space for data?

[Stefan Hansen]

We probably should check how big an ISO built from the current VM would
be. For the last Arramagong we had an similar amount of apps installed,
but I think more data; There was still heaps of space left, since FS
gets compressed. Also we might want to check if there is still stuff on
the VM that's not required. So far Cameron's setup-script removes only
the gnome-games.

cheers,
stefan

Ricardo Pinho wrote:
> Hamish,
>
> DVD Disk space is limited! (to 4.7 GB)
> But we will soon fill it all with installed apps!
> There seems to exist lots of FOSS4G nowadays. hehe...
>
>
> So I propose we solve this problem the other way around.
> Define now the limit for different type of data.
> So, at the end, there will be space on DVD for apps, data, scripts, tutorials, etc.
>
> thanks,
> Ricardo
>
>
> ----- Mensagem original ----
> De: Hamish <hamish_b at yahoo.com>
> Para: live-demo at lists.osgeo.org
> Enviadas: Quarta-feira, 2 de Setembro de 2009 12:09:27
> Assunto: [Live-demo] how much space for data?
>
> Hi,
>
> Using the OpenStreetMap -> PostGIS database + Mapnik + a tile generating
> script from GpsDrive I have prepared local street maps for the SYD area
> which I'd like to include on the disc to help folks figure out how to
> get around town.
>
> My question is- how much space on the disc would be appropriate for this?
> Currently I have provided detailed 1:5000 maps for the CBD, main roads
> out as far as the airport, and main highways overview from Wollongong to
> Newcastle.
>
> If there is the space I'd like to include 1:10k local street maps from
> Bondi to the Airport to Lewisham to North Sydney, but it starts to eat up
> space rather quickly the further you go out.
> So what's my disc space budget? 20mb? 50mb? 100mb?
>
> A more space-efficient & cool display of tech, but potentially fragile
> alternative is to store the OSM data directly in a local PostGIS DB and
> allow it to render Mapnik maps on the fly, but I'd need someone's help in
> cropping down the size of the PostGIS DB +world coastlines from
> Australia- wide to just the Sydney area. The uncropped version would be ~
> 400mb, to make a wild guess, the Sydney area probably accounts for a
> quarter of that data. So about the same disc space as I was looking at
> for the .png tiles, but more detail+scale options.
>
> I can shrink the PNGs more by converting them to JPEGs or some other
> lossy method, but the tiny street names are hard enough to read when you
> are bouncing along in a car already. Ah, compromises, compromises...
>
>
> Current prefab tile settings:
> - bounding box is minlon,minlat,maxlon,maxlat
>    (the tiles round outwards a bit from the coords given)
> - zoom level is the same as Google Maps/OSM Tiles/MicroSoft Maps all use
>
> # 1:44k
> gpsdrive_mapnik_gentiles --bbox "150.84,-34.0,151.3,-33.7" --scale 13
>
> # 1:20k
> gpsdrive_mapnik_gentiles --bbox "151.12,-33.95,151.26,-33.83" --scale 14
>
> # 1:10k and 1:5k
> gpsdrive_mapnik_gentiles --bbox "151.187,-33.89,151.226,-33.84" --scale 15-16
>
>
>
> thanks,
> Hamish
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--
Stefan Hansen
Software Engineer
LISAsoft

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