super(context, iterationHelper);
assert keyRange.spatial();
this.iterationHelper = iterationHelper;
IndexRowType physicalIndexRowType = keyRange.indexRowType().physicalRowType();
Index index = keyRange.indexRowType().index();
Space space = index.space();
int latColumn = index.firstSpatialArgument();
int lonColumn = latColumn + 1;
// The index column selector needs to select all the columns before the z column, and the z column itself.
IndexRowPrefixSelector indexColumnSelector = new IndexRowPrefixSelector(latColumn + 1);
IndexBound loBound = keyRange.lo();