6 uses of UNKNOWN in Visitors 7

pSurface::addPoint in pChart/class/pSurface.class.php

pSurface::computeMissing in pChart/class/pSurface.class.php

pSurface::drawContour in pChart/class/pSurface.class.php

pSurface::drawSurface in pChart/class/pSurface.class.php

pSurface::getNearestNeighbor in pChart/class/pSurface.class.php

pSurface::setGrid in pChart/class/pSurface.class.php