Requirements:
Cadcorp SIS Desktop (version 9)
As OS vector tiles are only available in Web Mercator projection, you will need to undertake a few extra steps to be able to use them within Cadcorp. Additionally, the tiles will not be reprojected into British National Grid (BNG), so the tiles may create some gaps within the data.
The following instructions outline how to change the projection of your basemap from British National Grid (EPSG:27700) to WGS 84 (EPSG:4326) in Cadcorp:
Open Cadcorp SIS Desktop (version 9) and navigate to Add Overlay in the upper ribbon.
In the Overlay Types dialog box, select Miscellaneous > Backdrop, then click Next.
Expand WGS 84 and select WGS 84 Lat/Long.
A basemap projected in WGS 84 will appear in the map screen. It is now possible to follow either method 1 or method 2 on the following pages to add vector tiles to a Cadcorp project.
The following sub-sections outline two methods for installing vector tiles in Cadcorp.
Method 1: Drag-and-drop
Download the vector tiles (MBTiles) and save them in a preferred location.
Start Cadcorp SIS Desktop and open a new or an existing map window.
Navigate to your saved vector tiles in file explorer and drag-and-drop the file into the map window.
The data will appear in your Maps Control Bar and render in your map window.
Method 2: Add Overlay
Download the vector tiles (MBTiles) and save them in a preferred location.
Start Cadcorp SIS Desktop and open a new or an existing map window.
In the upper ribbon, navigate to the Home tab and click Add Overlay.
In the Overlay Types dialog box, select Files > File as the Overlay type, then click Next.
In the File Browser dialog box, navigate to and select your saved vector tiles, then click Finish.
The data will now appear in your Maps Control Bar and render in your map window.
Adding stylesheets to OS vector tiles products in Cadcorp SIS Desktop
Vector tiles can be styled in any way desired. However, if you want to style them with OS styling, stylesheets for vector tiles can be found on GitHub on a product-by-product basis.
OS Open Zoomstack stylesheets can be automatically applied when adding this product into CadCorp SIS Desktop. While vector tile stylesheets do exist for OS VectorMap Local, they cannot currently be applied in Cadcorp SIS Desktop.
To add stylesheets to OS vector tiles products in Cadcorp SIS Desktop, please use the following instructions:
Download the appropriate repositories from GitHub. The example screenshot below shows a screenshot of the GitHub repository containing OS Open Zoomstack stylesheets.
Add the stylesheets file to the folder where the MBTiles are also stored and rename the stylesheets file so that it has the same name as the MBTiles file.
Add the following file extension to the end of the newly named stylesheets file: .style.json
Drag and drop the style.json file into your Cadcorp SIS Desktop project.
The styling will now be applied to your layer.