AUX (Auxiliary File)
GISBox is a one-stop 3D GIS data editing, conversion and publishing platform that supports editing in multiple GIS formats such as OSGB/GEOTIFF/RVT, converting to 3DTiles/Terrain and publishing.
Introduction
**AUX file (Auxiliary File) **is a file used in GIS (Geographic Information System) to store auxiliary information (such as spatial index, attribute index, metadata, etc.) of geographic datasets, aiming to improve the efficiency of spatial query and analysis.
File Structure
- File header: defines “who you are” (version, coordinate system).
- Spatial index: quickly answer “where” (spatial location).
- Attribute index: quickly answer “what” (attribute value).
- Metadata: explains “where it comes from” (data background).
- Extension: add “extra information” according to needs.
Pros
- Speed up query: Index information significantly improves the response speed of spatial and attribute queries.
- Simplify management: Metadata storage facilitates data description, archiving and version management.
Cons
- Dependency: Strongly associated with the main geographic data file. If the AUX file is lost or damaged, the query function may fail.
- Storage overhead: Additional storage space is occupied, especially for large data sets, which may increase storage costs.
Application Scenario
AUX files can be used to store spatial index information for geographic datasets to speed up the execution of spatial queries and analysis operations. AUX files can also be used to store attribute index information to provide faster response times in attribute queries. AUX files can also be used to store metadata for geographic datasets, including a description of the data, coordinate system information, creation date, etc.
Example
- AUX file.
- Open the AUX file in the software.
