The LIDAR layers from the EA are already defined in DefinedLayerDefs_Other.csv, so for a particular OPS all that is necessary is to add pointers to the required defined layers into the LayerDefs_Other.csv file. The process is:
- Go to the Government's list of DTM LIDAR feeds
- For 'LIDAR Composite DTM - 2m' click (on the right) Preview on Map
- Repeat this for:
- 'LIDAR Composite DTM - 1m'
- 'LIDAR Composite DTM - 50cm'
- 'LIDAR Composite DTM - 25cm'
- Now you have 4 maps in the Preview List on the left, click on Preview Maps
- In the map, zoom in and find your OPS
- Find the best (smallest) resolution available for your OPS, by:
- On the left, turn on the 25cm layer (click to put tick into little box), and wait
- If no LIDAR map appears, turn on the 50cm layer and again wait
- Again if no LIDAR map appears, repeat the process for the 1m and, possibly, 2m
- In your LayerDefs_Other.csv enter a row like (if 1m was the best resolution):
- Defined;Lidar;EA 1m DTM LIDAR;Terrain (DTM)
- Repeat the whole process for DSM instead of DTM
- Then (as usual) upload, recompile, clear cache and refresh M4OPS
