About-Layer-and-Spatial-Indexes

About Layer and Spatial Indexes

About Layer and Spatial Indexes

To receive the maximum benefit of demand loading, it is recommended that you save
any drawings that are used as xrefs with layer and spatial indexes.

A layer index is a list showing which objects are on which layers. This list is used
when the program is referencing the drawing in conjunction with demand loading to
determine which objects need to be read in and displayed. Objects on frozen layers
in a referenced drawing are not read in if the referenced drawing has a layer index
and is being demand loaded.

The spatial index organizes objects based on their location in 3D space. This organization
is used to efficiently determine which objects need to be read in when the drawing
is being demand loaded and clipped as an xref. If demand loading is turned on, and
the drawing is attached as an xref and clipped, the program uses the spatial index
in the externally referenced drawing to determine which objects lie within the clip
boundary. The program then reads only those objects into the current session.

Spatial and layer indexes are best used in drawings that will be used as xrefs in
other drawings where demand loading is enabled. Drawings that are not going to be
used as xrefs or partially opened will not benefit from layer and spatial indexing
or demand loading.

Learning AutoCad

receive the maximum benefit of demand loading, it is recommended that you save any drawings that are used as xrefs with layer and spatial indexes. A layer …Index Type, select Layer, Spatial, or Layer & Spatial and click OK. Note: If you are saving a partially open drawing that  …layer and spatial indexes. INDEXCTL set to 0 (the default) does not create an index.Index Type, select Layer, Spatial, or Layer & Spatial and click OK. Note: If you are saving a partially open drawing that  …spatial index is used to decrease the time it takes to locate features that match … In order to accomplish this, after creating the layer grid object, all shapes or …Layers with an Editing Buffer; Using Spatial Index; Writing Vector Layers; Memory Provider; Appearance (Symbology) of Vector Layers.… But what I'm interested in is, how the Layer & Spatial Index will work for you or benefit you when using with Xrefs. To understand this topic you …… INDEXCTL creates what are called Layer Indexes and Spatial Indexes in the Drawing you are referencing. So thus you would turn this Variable …