Deleted fieldblock variable and the corresponding methods because Invekos data is part of a fieldblock and not vice versa.
Renamed the 'area' methods to 'hectarArea' methods because the unit is ha and not m² in Invekos. Added methods to get the area in m² too.
Authored by: wellgis 2012-06-21
Parent: [r123]
Child: [r125]
