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The maps are provided from the OS via Web Mapping Tile Services (WMTS) from https://api.os.uk. To use these services a key must be generated. Follow the guidance here from the Ordnance Survey.

MapProxy

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Configuration

iShare v6 uses MapProxy to cache requests to the OS WMTS. Configuration of MapProxy is done by editing the mapproxy.yaml configuration file.

For the live LIVE iShare application this is located here: D:\mapproxy\mapproxy.yaml.

For the test TEST iShare application this is located here: D:\mapproxytest\mapproxy.yaml.

You will need to define the following items in mapproxy.yaml:

A base grid which includes a bounding box, default resolutions and projection information. In the example below osgb__osmaps_epsg27700_premium__grid is the base grid.

Code Block

grids:
  webmercator:
    base: GLOBAL_WEBMERCATOR
  # OS Maps API WMTS EPSG:27700 grid with full resolutions, used as
  # a base for the other OS Maps API WMTS EPSG:27700 grids
  osgb__osmaps_epsg27700_premium__grid:
    origin: nw
    srs: 'EPSG:27700'
    bbox: [-238375.0000149319, 0.0, 900000.00000057, 1376256.0000176653]
    bbox_srs: 'EPSG:27700'
    res: [896.0, 448.0, 224.0, 112.0, 56.0, 28.0, 14.0, 7.0, 3.5, 1.75, 0.875, 0.4375, 0.21875, 0.109375]

An optional grid for each base map which includes resolution overrides. More information about the native resolutions can be found here. Here we have one override for the Leisure Premium and two for open data resolutions, these should be added directly after the osgb__osmaps_epsg27700_premium__grid.

Code Block

language	yaml

  # OS Maps API WMTS EPSG:27700 grid with resolutions for open data only
  osgb__osmaps_epsg27700_open__grid:
    base: osgb__osmaps_epsg27700_premium__grid
    res: [896.0, 448.0, 224.0, 112.0, 56.0, 28.0, 14.0, 7.0, 3.5, 1.75]
  # OS Maps API WMTS EPSG:27700 grid for Leisure premium and open data resolutions
  osgb__osmaps_epsg27700_leisure_premium__grid:
    base: osgb__osmaps_epsg27700_premium__grid
    res: [896.0, 448.0, 224.0, 112.0, 56.0, 28.0, 14.0, 7.0, 3.5, 1.75]
  # OS Maps API WMTS EPSG:27700 grid for Leisure open data resolutions
  osgb__osmaps_epsg27700_leisure_open__grid:
    base: osgb__osmaps_epsg27700_premium__grid
    res: [896.0, 448.0, 224.0, 112.0, 56.0, 28.0]

A source for each base map which includes the grid and the WMTS url from https://api.os.uk. Edit the URL to use the API key that you’ve generated from the Ordnance Survey.

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Save the following as “E:\iShareData\LIVE\_MapServerConfig\base_osmapapi.map” if creating base maps for iShare Live LIVE or “E:\iShareData\TEST\_MapServerConfig\base_osmapapi.map” if creating base maps for iShare TestTEST. You will notice the .map file has no layer definitions. It is only used to select the base map’s projection.

Code Block

MAP
	NAME "OS MAP API"
	CONFIG "PROJ_LIB" "D:\mapserver\shared\proj\nad"
	CONFIG "MS_ERRORFILE" "logs/live_base_osmapapi_debug.log"
	PROJECTION
		"init=epsg:27700"
	END
	TEMPLATEPATTERN "."
	MAXSIZE 8192
	SIZE 512 512
	EXTENT 0 0 700000 1300000
	IMAGECOLOR 238 238 237
	DEBUG 5
	FONTSET "D:/mapserver/shared/fonts/fonts.list"
	SYMBOLSET "D:/mapserver/shared/symbols/symbolsms6.sym"
	SHAPEPATH "../"
	IMAGETYPE "png"
	OUTPUTFORMAT
		NAME "png"
		DRIVER "AGG/PNG"
		IMAGEMODE RGB
		MIMETYPE "image/png"
		EXTENSION "png"
		TRANSPARENT FALSE
		FORMATOPTION "INTERLACE=OFF"
		FORMATOPTION "QUANTIZE_FORCE=ON"
	END
	UNITS METERS
	RESOLUTION 72
	WEB
		METADATA
			"ows_title" "OS MAPS API" 
			"author" "Astun Technology" 
			"ows_enable_request" "*" 
			"ows_srs" "EPSG:27700" ## Recommended
			"ows_abstract" "OS MAPS API Demonstration" 
			"wms_srs" "epsg:27700"
		END
		IMAGEPATH "D:/mapserver/tmp/"
		TEMPPATH "D:/mapserver/tmp/"
		IMAGEURL ""
		TEMPLATE "globexml.xml"
	END
END

Create

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Base Maps in Studio

Create a new base map in Studio under Map Sources > BaseMaps.

Under Map Settings choose the above base_osmapapi.map file. Select WMTS as the Basemap Type. Projection will be EPSG: 27700 and Map Units are Meters.

Under Start up use the following boundary settings.

Name	Value
Min X	`-238375.000014932`
Min Y	`0`
Max X	`900000.00000057`
Max Y	`1376256.00001767`

Under Details use the following settings.

Name	Value
Name	The layer name in mapproxy.yaml e.g. `osgb__osmaps_road_27700`
Copyright	The appropriate Ordnance Survey copyright message
Type	`KVP`
URI	https://<isharegis_url>/mapproxy/<auth_key>/service?
WMS URL	Same as above
Tile Matrix Set Name	The grid in `mapproxy.yaml` e.g. osgb__osmaps_epsg27700_premium__grid
Tile Matrix Set Matrices	all

Save and add the Base Map to the chosen MapSource to view.

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MapProxy

Configuration

Create

Base Maps in Studio