So what I want to do, is to be able to select a line feature (trails) and have related lines, based on attributes, selected too.
What I am thinking is in a data grid. I have been playing with ways to do this.
I have tried Datagrid look up. Neither way seems to work the way I am wanting.
Ultimately I want to join this with the Elevations Profile web-app. I can do this part (I hope), if I can figure how to select related features.
Our data has multiple trails that split off of each other.