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            Q_ASSERT(mSaplingHeightMap);
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            Q_ASSERT(mSaplingHeightMap);
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            int pixel_index = cPxPerRU*(position.x()-mCornerCoord.x())+(position.y()-mCornerCoord.y());
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            int pixel_index = cPxPerRU*(position.x()-mCornerCoord.x())+(position.y()-mCornerCoord.y());
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            float h =  mSaplingHeightMap[pixel_index];
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            float h =  mSaplingHeightMap[pixel_index];
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            return h;
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            return h;
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    }
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    }
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    /// access to the internal sapling height map pointer
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    const float *saplingHeightMapPointer() const {return mSaplingHeightMap; }
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    /// return maximum sapling height at point 'position' (LIF-index). This call is slower but works witout a prior call
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    /// return maximum sapling height at point 'position' (LIF-index). This call is slower but works witout a prior call
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    /// to setSaplingHeightMap().
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    /// to setSaplingHeightMap().
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    float saplingHeightForInit(const QPoint &position) const;
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    float saplingHeightForInit(const QPoint &position) const;
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    /// set the height of the sapling map to the maximum of current value and 'height'.
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    /// set the height of the sapling map to the maximum of current value and 'height'.
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    void setMaxSaplingHeightAt(const QPoint &position, const float height);
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    void setMaxSaplingHeightAt(const QPoint &position, const float height);