# TREEDEPTH System Variable [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [System Variables](Help%20System/GSTARCAD/2019/System%20Variables/(System%20Variables).md) → [T](Help%20System/GSTARCAD/2019/System%20Variables/T/(T).md) ## Function Description: The TREEDEPTH system variable is used to specify the maximum depth, it means the number of times the tree-structured spatial index can divide into branches. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 3020 | ## System Variable Value: **0:** suppress the spatial index entirely. It may eliminating the performance improvement in large drawing. This setting could make sure all objects dealt in database order. **\>0:** open the spatial index. An integer of up to five digits is valid. The first 3 digits refer to model space, the remaining two digits refer to paper space. **\<0:** treat objects in model space as 2D objects by ignoring Z coordinates, similar as objects in paper space. This settings is suitable for 2D drawing. It makes efficient use of memory without loss of performance. **Note:** this system variable could not be used transparently. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/T/TREEDEPTH%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/T/TREEDEPTH%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/T/TREEDEPTH%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/T/TREEDEPTH%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/T/TREEDEPTH%20System%20Variable.md)