Convert OS Mastermap GMZ to 500m2 .dwg tile files

Yes, you just need to create a 500m grid to clip them with

Hi @scarter,

You can use the Tiler transformer to split the data up into the tiles. This transformer will clip the features along the tile boundary, then assign row and column attributes to them.

To write the tiles out to separate DWG files, please enable Fanout Dataset on the writer, then use the _row and _column attributes in the fanout expression. For more info on Dataset fanouts, please see:

http://docs.safe.com/fme/2018.1/html/FME_Desktop_Documentation/FME_Workbench/Workbench/fanout_about.htm

OS mastermap in geochunked 1km tiles includes features that fall across the boundary, it means you need to do some calculation to calculate the seed coordinate to use in the tiler

Thanks for that, @ebygomm. This option seems more of a goer. I do have a 500m grid .tab file where the Tile field contains the 500m tile value (e.g.: TQ4092SW). It's that tile value that I'd want the output files to be called. So, any features from the GML that fall within TQ4092SW would output into a DWG file called TQ4092SW.dwg. And any features from the GML falling within TQ4157NE would output into a DWG file called TQ4157NE.dwg, and so on. Forgive me, I am an absolute beginner, how do I reference the tile grid as the clipping table?