MDB is a database file used by Microsoft Access, but in a GIS context it use to be an Esri Personal Geodatabase which is based on Microsoft Access.
Table of contents
- Purpose: Store, query, and manage both spatial and nonspatial data.
- Data type: vector and raster
- Type of format: GIS
- Multi-file format: No
- File type: binary
- File extension(s): .mdb, .zip
- Originally developed by: Microsoft (1992)
- Technical description/specification: Not available
- License: Unknown
- Regulated by: Microsoft
- Status: proprietary
- Sample file(s): Personal GeoDatabases sample files
- Consumable by:
Note: Personal GeoDatabases were introduced by Esri in ArcGIS for Desktop 8.0 (1999).
Description: Original data format for ArcGIS geodatabases stored and managed in Microsoft Access data files.(This is limited in size and tied to the Windows operating system.)
Number of users: Single user and small workgroups with smaller datasets: some readers and one writer. Concurrent use eventually degrades for large numbers of readers.
Storage format: All the contents in each personal geodatabase are held in a single Microsoft Access file (.mdb).
Size limits: Two GB per Access database. The effective limit before performance degrades is typically between 250 and 500 MB per Access database file.
Versioning support: Only supported as a geodatabase for clients who post updates using checkout and check-in and as a client to which updates can be sent using one-way replication.
Platforms: Windows only.
Security and permissions: Windows file system security.
Database administration tools: Windows file system management.
Notes: Often used as an attribute table manager (via Microsoft Access). Users like the string handling for text attributes.
- File GeoDataBase: is the evolution of the personal geodatabase