[Talk-GB] New OOC OS 1:25,000 tiles (beta)

Grant Slater openstreetmap at firefishy.com
Sun Feb 26 22:31:32 GMT 2012


Now also available in extra zoom layers: z0 to z22 on OOC OS1, OS
Streetview and Surrey Aerial Survey.

WMS too is available, on a per request basis.

/ Grant


On 24 February 2012 11:28, Andy Robinson <ajrlists at gmail.com> wrote:
> Thanks to Grant there is now a new beta version of the Out-Of-Copyright OS
> 1:25,000 mapping available currently viewable at
> http://faffy.openstreetmap.org/?zoom=6&lat=54.46526&lon=-2.50923&layers=00B0
> (note this address may change in the future).
>
> The process used is different from that currently visible at
> ooc.openstreetmap.org in that the maps are tiled and delivered by MapServer
> on the fly which means that the task of rectifying and tiling each map sheet
> isn't required, instead MapServer uses the georeferenced original TIFF
> scans.
>
> The main benefit to users now is that the whole of each map sheet is visible
> (the old method sliced off edge tiles for isolated sheets during the tiling
> process).
> I've added info for JOSM users on the wiki
> (http://wiki.openstreetmap.org/wiki/Provisional/First_Edition#JOSM). It
> needs testing in Potlatch and Merkartor . Note that the tiles are now png
> rather than jpg if you are simply making a server name change in the editor
> settings.
>
> The main benefit in the longer term is that the vast number of maps sheets
> donated by Glasgow University will be available much more quickly once they
> have been scanned.
>
> Mapserver has been set up to serve index colour tiles (to maintain
> performance) which may result in some sheets not being as colour rich as
> with the old tiles. This will be improved as new scans come online. To check
> out what the new ones should look like pan over to sheet TG41 on the Norfolk
> coast, especially in contrast to TG40 to the south of it.
>
> If you click the layer tab from the faffy map view you will also note that
> the latest OS Streetview and  the Surrey County Air Survey are also being
> served by MapServer in the same way.
>
> Bear in mind that this instance of MapServer is still very much in testing
> mode so the facility may go offline at times.
>
> Cheers
> Andy
>
>
>
>
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