improve docmentation

data-raw/rfp_xref_layers_custom.R

@@ -1,5 +1,7 @@
 
-#' This is a table that cross references the names of the layers in GIS projects with metadata about where they come from and what they represent.
+#' This is a table that cross references the names of the layers in GIS projects with metadata about where they come
+#' from and what they represent. Layers include `rfp_tracking`, [bcfishpass](https://github.com/smnorris/bcfishpass) (bcfishpass schema and modelling input parameters)
+#' and [bcfishobs](https://github.com/smnorris/bcfishobs) output layers.
 #' @name rfp_xref_layers_custom
 #' @docType data
 #' @author Al Irvine \email{[email protected]}