Specifies the maximum depth, that is, the number of times the tree-structured spatial index can divide into branches.
| Type: | Integer | 
| Saved in: | Drawing | 
| Initial value: | 3020 | 
|  
			  Value  | 
 
			  Description  | 
|---|---|
|  
			  0  | 
 
			  Suppresses the spatial index entirely, eliminating the performance improvements it provides in working with large drawings. This setting assures that objects are always processed in database order.  | 
|  
			  >0  | 
 
			  Turns on spatial indexing. An integer of up to five digits is valid. The first three digits refer to model space, and the remaining two digits refer to paper space.  | 
|  
			  <0  | 
 
			  Treats model space objects as 2D (Z coordinates are ignored), as is always the case with paper space objects. Such a setting is appropriate for 2D drawings and makes more efficient use of memory without loss of performance  |