Map preferences

Question

Hi there

On our implementation of the API, we use only OS Landranger 1:50k and Explorer 1:25k maps.

To facilitate this we use the code:

function onLoad() {

  mapviewer = new MultimapViewer( document.getElementById( 'mapviewer' ) );

  var newprefs = [];

  newprefs.push(904);

  newprefs.push(932);	var maptype = MM_WORLD_MAP;

  MMDataResolver.setDataPreferences( maptype, newprefs ); 

This works fine. However explorer maps (932) only show at zoom level 16, by which point the map looks very large. Is there any way we could make explorers show at zoom 15 (and maybe 14) and just use the landrangers at 13?

Cheers.

Answer 1

Hi,
We assume you are an Open API customer,

Warning : As map data is routinely updated, the map data values may 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 .

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.

For the commercial API, 1:25,000 OS Explorer maps are only available at zoom levels 16 and 17.  1:50,000 OS Landranger maps are provided at zoom levels 13, 14 and 15.

Thanks, John.

Answer 2

Hi John

No, we use the commercial API as well, so we do offer 1:25 000 maps. However as I say our map data preferences for 1:25k and 1:50k only result in the 1:25k maps being shown at zoom level 16, we'd like to use them on zoom 15 and possibly 14, and only have 1:50k on zoom level 13.

Re: the map data values. To be fair the preferences example does not make it clear how to set the preferences to show the 1:25k and 1:50k mapping, it only shows you how to reverse the preferences. Maybe a new example could be set up which actually sets preferences from scratch.

Best regards
Paul

Answer 3

Hi John

There are other users of the API who do show Explorer mapping at zoom 15 (but their code is hidden) - so this must be possible!

Answer 4

Hi John

There are other users of the API who do show Explorer mapping at zoom 15 (but their code is hidden) - so this must be possible!

Hi webyork

We investigated into your comment on Explorer maps at zoom 15 and can confirm, using the Multimap Open API in the supported method, OS 1:25,000 Explorer maps can only be displayed at zoom levels 16 and 17.  Please could you provide links to the implementation using OS 1:25,000 Explorer maps at zoom level 15.

Thank you for your feedback for a specific example on map data preferences, this has been noted, our service  documentation is revised regularly and we will take this into consideration on future releases.

Thanks, John.