This class is similar to the IlvTile, except that instead of being part of a regular grid (and therefore indexed by line and column), its bounds can be freely specified. This is particularly useful when overlapping areas are needed, for example, in case of a projected map. Note that although IlvFreeTile is a subclass of IlvTile (for compatibility reasons), the member variables row and column are not relevant in terms of tile location. They are used to locate a superclass IlvTile instance on a grid, but given that IlvFreeTile objects have bounds of their own, there is no need for line and column properties.
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