Using OS Maps in iShare v6
- Andrew Bailey
- Kim Stimpson
- Matt Walker
This guide will explain how to set up OS Maps in iShare (Maps and GIS) v6.
Obtain a key from the Ordnance Survey
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 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 iShare application this is located here: D:\mapproxy\mapproxy.yaml.
For the 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.
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.
# 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.
osgb__osmaps_road_27700__wmts:
type: tile
grid: osgb__osmaps_epsg27700_premium__grid
url: https://api.os.uk/maps/raster/v1/wmts?key=INSERT_KEY_HERE&height=256&width=256&style=default&layer=Road_27700&version=1.0.0&service=WMTS&Request=GetTile&format=image/png&TileMatrixSet=EPSG:27700&TileMatrix=EPSG:27700:%(z)s&TileRow=%(y)s&TileCol=%(x)s
osgb__osmaps_outdoor_27700__wmts:
type: tile
grid: osgb__osmaps_epsg27700_premium__grid
url: https://api.os.uk/maps/raster/v1/wmts?key=INSERT_KEY_HERE&height=256&width=256&style=default&layer=Outdoor_27700&version=1.0.0&service=WMTS&Request=GetTile&format=image/png&TileMatrixSet=EPSG:27700&TileMatrix=EPSG:27700:%(z)s&TileRow=%(y)s&TileCol=%(x)s
osgb__osmaps_light_27700__wmts:
type: tile
grid: osgb__osmaps_epsg27700_premium__grid
url: https://api.os.uk/maps/raster/v1/wmts?key=INSERT_KEY_HERE&height=256&width=256&style=default&layer=Light_27700&version=1.0.0&service=WMTS&Request=GetTile&format=image/png&TileMatrixSet=EPSG:27700&TileMatrix=EPSG:27700:%(z)s&TileRow=%(y)s&TileCol=%(x)s
osgb__osmaps_leisure_27700__wmts:
type: tile
grid: osgb__osmaps_epsg27700_leisure_premium__grid
url: https://api.os.uk/maps/raster/v1/wmts?key=INSERT_KEY_HERE&height=256&width=256&style=default&layer=Leisure_27700&version=1.0.0&service=WMTS&Request=GetTile&format=image/png&TileMatrixSet=EPSG:27700&TileMatrix=EPSG:27700:%(z)s&TileRow=%(y)s&TileCol=%(x)sThe four base maps available in British National Grid are:
Name | Layer for URL | Sample |
|---|---|---|
OS Maps Road | Road_27700 | 
|
OS Maps Outdoor | Outdoor_27700 | 
|
OS Maps Light | Light_27700 |
|
OS Maps Leisure | Leisure_27700 |
|
A cache for each base map which includes the above grid and source.
A layer for each base map which includes a name, a title and the above source.
Check that the services section includes EPSG:27700 (British National Grid) in the list of supported WMS SRS (Spatial Reference System) values.
Check that the cache base directory has been defined under the globals section and that the path exists
Lastly we want to add an authorisation key of our own making. Add this to the end of the mapproxy.yaml file. The key value will be used in the MapProxy URL in iShare. Choose your own value for the key.
Save the mapproxy.yaml file.
Create a .map file for the OS Base Maps.
Save the following as “E:\iShareData\LIVE\_MapServerConfig\base_osmapapi.map” if creating base maps for iShare LIVE or “E:\iShareData\TEST\_MapServerConfig\base_osmapapi.map” if creating base maps for iShare TEST. You will notice the .map file has no layer definitions. It is only used to select the base map’s projection.
Create 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 |
|
Min Y |
|
Max X |
|
Max Y |
|
Under Details use the following settings.
Name | Value |
|---|---|
Name | The layer name in mapproxy.yaml e.g. |
Copyright | The appropriate Ordnance Survey copyright message |
Type |
|
URI | https://<isharegis_url>/mapproxy/<auth_key>/service? |
WMS URL | Same as above |
Tile Matrix Set Name | The grid in |
Tile Matrix Set Matrices | all |
Save and add the Base Map to the chosen MapSource to view.