How to get the relationship each sample point on HD map

[juyangbai]

Hello, I'm trying to use Waymo Dataset on the LaneGCN model. The original LaneGCN is tested on the Argoverse Dataset, whose HD map has the relationship between each sample point, such as successor, predecessor, left, and right. However, the Waymo Dataset doesn't have this information. I'm wondering how do you get the information about the relationship between each sample point? Do you know how can I process the Waymo Dataset to get the relationship between each sample point, and run successfully on LaneGCN? Thanks!