OS 1:25,000 Explorer maps

Question

I'm reading a blog posting from Multimap which says that Explorer maps are available in the Multimap API . Does that include the Open API? If so can someone tell me which magic numbers I need. I currently have

    MMDataResolver.setDataPreferences( MM_WORLD_MAP, [904]);

    mapviewer.setZoomFactor(15);
    mapviewer.setAllowedZoomFactors (13,15);

which gives me 1:50,000 with three levels of zoom.

Thanks

Answer 1

Inspecting 'basic maps' on the main site as per this other thread
http://social.msdn.microsoft.com/Forums/en-US/multimapapi/thread/d236555f-b87e-4968-a83f-93de02538c54
suggests that the magic number for Explorer/25k map is 932.

However I couldn't get that to work with the Open API - I suspect we get an older set of tiles.

I think if/when it does work, it'll be available only at closer zooms where the Landranger/50k style is not

cheers, Ross K

Answer 2

Ah yes, I tried 932 yesterday, having looked at the source of the example linked to from the blog but like you I had no joy.

Ho hum. My users are crying out for 1:25,000, especially as they know that Multimap now have it available.

Answer 3

Hi
Multimap are not currently in a position to offer Ordnance Survey Explorer maps (1:25,000 scale) in our Open API. These maps have yet to been included in Ordnance Survey’s OpenSpace API and therefore, in order for us  to offer the data, we would need to bear the costs associated with their use.

Warning : Referring to the information and posts about "magic numbers", as map data is routinely updated, the map data values (the magic numbers) may also change at any time, therefore we do not recommend any implementations make use of specific map data values.  To implement different map data we recommend implementing along the lines of the Map Data Preference example at http://clients.multimap.com/share/documentation/openapi/1.2/demos/dataprefs.htm .

Thanks, John.

Answer 4

Hi John,

How come the example you give is able to show 1:25,000?  If I copy the code into my own page it cannot.

Cheers

Aidan

Answer 5

Hi John,

How come the example you give is able to show 1:25,000?  If I copy the code into my own page it cannot.

Cheers

Aidan

Hi Aidan
The Map Data Preference example at http://clients.multimap.com/share/documentation/openapi/1.2/demos/dataprefs.htm, does not display 1:25,000 OS maps, you can't tell from the blue bar but from the zoom level.  1:25,000 OS maps are displayed at zoom levels 16 or 17 depending on the map data type options your are viewing.

You can check this by reviewing the maps displayed on the Multimap public site and the example, start at the highest zoom level and keep an eye on the quality of the OS maps.
Thanks, John.

Answer 6

Hi John,

That has changed since my post - I know for a fact that it was showing 1:25,000 previously when I posted.  The easy way to tell is that right-of-way footpaths become green instead of red.  I wish I'd got a screenshot at the time... wouldn't have posted if I hadn't seen it with my own eyes!

Oh well, I guess this was some kind of error to do with the rights that the demo API key had.

Actually, the available maps on that demo are still different to what I get... 

Out of towns, at zoom level 14,  the demo has 3 possible map types: Collins Bartolomew, Crown Copyright (OS 1:50,000) and Tele-Atlas. 

Whereas I only get Crown Copyright (OS 1:50,000) and Tele-Atlas.

Can you explain what is going on there?  Or will you just change the demo and deny the issue again ;-) (I've got a screenshot this time!)?

Thanks

Aidan

Answer 7

Aidan, I got the same thing from Multimap: a strange map behaviour was noticed and escalated, later on the problem has disappeared and Multimap said nothing was changed ;-(

Answer 8

A bit silly really - if they're going to fix something they may as well take the credit and be seen to be doing their job, rather than trying to pretend everything was perfect from the start!

Answer 9

Hi John,

That has changed since my post - I know for a fact that it was showing 1:25,000 previously when I posted.  The easy way to tell is that right-of-way footpaths become green instead of red.  I wish I'd got a screenshot at the time... wouldn't have posted if I hadn't seen it with my own eyes!

Oh well, I guess this was some kind of error to do with the rights that the demo API key had.

Actually, the available maps on that demo are still different to what I get... 

Out of towns, at zoom level 14,  the demo has 3 possible map types: Collins Bartolomew, Crown Copyright (OS 1:50,000) and Tele-Atlas. 

Whereas I only get Crown Copyright (OS 1:50,000) and Tele-Atlas.

Can you explain what is going on there?  Or will you just change the demo and deny the issue again ;-) (I've got a screenshot this time!)?

Thanks

Aidan

Hi Aidan
Just a quick update to let you know the Multimap Development team are currently investigating and we will provide an update shortly.
Thanks, John.

Answer 10

Hi Aidan,
To clarify, the Open API has never had the ability to display 1:25,000 OS Explorer maps and Multimap does not make changes to the Open API and inform users that the issue ever existed.  We do try our best to diagnose any issues and inform users as quickly as possible.

Upon review, the development team did find an issue with the configuration of map data types on Open API services and are resolving this.  To help you with your implementations, we have updated the Open API services you have with us to display the correct set of map data types.

I hoep this resolves the issues you were experiencing, please let us kow how you get on.

Thanks, John.

Answer 11

So I still don't get why the demo http://clients.multimap.com/share/documentation/openapi/1.2/demos/dataprefs.htm has different map types available to if I use exactly the same code with my API key: http://www.aidangrant.com/maps/prefs.htm?

As predicted, the Colins Bartholomew option has suddenly becvome available at zoom 14 in the countryside, but at the start location in London, I get 4 options while the demo has just 3.

Answer 12

So I still don't get why the demo http://clients.multimap.com/share/documentation/openapi/1.2/demos/dataprefs.htm  has different map types available to if I use exactly the same code with my API key: http://www.aidangrant.com/maps/prefs.htm ?

As predicted, the Colins Bartholomew option has suddenly becvome available at zoom 14 in the countryside, but at the start location in London, I get 4 options while the demo has just 3.

This was due to the map data setting on the demo service, we have manually updated this now so the demo service and your Open API services should now be displaying the same map data.
Thanks, John.