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What is spatial index in ArcGIS?
ArcGIS Pro uses spatial indexes to improve spatial query performance on feature classes. When you create an empty feature class or import data to create a feature class in a geodatabase from ArcGIS Pro, a spatial index is created on the feature class. The spatial index is used when querying and editing data.
Which types of spatial indexes are applied by ESRI’s ArcMap?
Types of spatial indexes Personal geodatabases. File geodatabases. Geodatabases in Db2. Geodatabases in Oracle, if the feature class contains an Esri ST_Geometry or binary geometry storage field.
What is a spatial index used for in geospatial databases?
A spatial index is a data structure that allows for accessing a spatial object efficiently. It is a common technique used by spatial databases. Without indexing, any search for a feature would require a “sequential scan” of every record in the database, resulting in much longer processing time.
Why do I need spatial index in ArcGIS?
Usage ArcGIS uses spatial indexes to quickly locate features in feature classes. Identifying a feature, selecting features by pointing or dragging a box, and panning and zooming all require ArcMap to use the spatial index to locate features. By default, ArcGIS creates and maintains a spatial index for geodatabase feature classes.
When to add a spatial index in ArcSDE?
Adding a new spatial index to an ArcSDE feature class is a server-intensive operation. It should not be done on large feature classes when a large number of users are logged in to the server. ArcSDE feature class, file geodatabase feature class, or shapefile to which a spatial index is to be added or rebuilt.
Can a geodatabase feature not have a spatial index?
For a geodatabase feature class to not have a spatial index, you must explicitly remove it using the Remove_Spatial_Index tool. The Spatial Grid 1, 2, and 3 parameters only apply to file geodatabases and certain ArcSDE geodatabase feature classes (those that use SQL Server binary storage, DB2, Oracle binary storage, or Oracle ST_Geometry).
How to add spatial index to a shapefile?
Adds a spatial index to a shapefile, file geodatabase, mobile geodatabase, or enterprise geodatabase feature class. Use this tool to either add a spatial index to a shapefile or feature class that does not already have one or to re-create an existing spatial index.