Map of geo to active indices.

Map of geo to active indicesThe vector maps actual station index (which is defined by ) to the index of station in tracking. If the station is inactive, its index is equal to -1. stations 1 and 4 be inactive. Then: geometry index: 0 1 2 3 4 5 6 7 8 9 0 0 0 0 active index: 0 -1 1 2 -1 3 4 5 6 7 0 0 0 0