join_near_values function - ObjectVision/GeoDMS GitHub Wiki

Relational functions join_near_values

• join_near_values(geometry_first, geometry_second, dist)

join_near_values(geometry_first, geometry_second, dist) results in a uint32 domain unit that represents each combination of geometry_first and geometry_second for which the distance is less than the configured dist parameter.
The function results in two subitems being attributes of this domain:

• first_rel : the index numbers of each row of the domain unit of the first geometry with a distance to the second geometry of less than the configured dist attribute.
• second_rel : the index numbers of each row of the domain unit of the second geometry with a distance to the first geometry of less than the configured dist attribute.

• geometry_first: a point data item
• geometry_second: a point data item
• dist: a float64 parameter

1. The values unit of the arguments: geometry_first and geometry_second must match.
2. The domain unit of the arguments: geometry_first and geometry_second must be zero based.

unit<uint32> ZipCodesNearby_m50 := join_near_values(zipcode/geometry, zipcode/geometry, 50d);

domain ZipCodesNearby_m50 , nr of rows = 5