[pdal-commits] [PDAL/PDAL] b9db4e: Use signed int for clustering/grouping (#3079)

[chambbj]

  Branch: refs/heads/issue-3079
  Home:   https://github.com/PDAL/PDAL
  Commit: b9db4e97a1eff577eb95be4b7d9fc13135730461
      https://github.com/PDAL/PDAL/commit/b9db4e97a1eff577eb95be4b7d9fc13135730461
  Author: Bradley J Chambers <brad.chambers at gmail.com>
  Date:   2020-05-21 (Thu, 21 May 2020)

  Changed paths:
    M filters/DBSCANFilter.cpp
    M filters/DBSCANFilter.hpp
    M filters/GroupByFilter.cpp
    M pdal/Dimension.json

  Log Message:
  -----------
  Use signed int for clustering/grouping (#3079)

Modify DBSCAN to use the standard ClusterID dimension, which is now
defined as int64. The Groupby filter is similarly instructed to evaluate
int64. This allows clustering algorithms like DBSCAN to use -1 to
indicate noise.