File GEODATABASE (Geodatabase) for GeoSWMM Project

When a user creates a new project in GeoSWMM, all of the types of default GIS layers are generated within a file geodatabase. A file geodatabase is a collection of files in a folder on disk that can store, query and manage both spatial and non-spatial data. Several users can use the same file geodatabase simultaneously, but only one user at a time can edit the same set of data. Multiple users can edit a file geodatabase, but they must be editing different data.

File geodatabases are made up of seven system tables plus user data. User data can be stored in the following types of datasets:

·       Feature class

·       Feature dataset

·       Mosaic dataset

·       Raster catalog

·       Raster dataset

·       Schematic dataset

·       Table (non-spatial)

·       Toolboxes

 

Feature datasets can contain feature classes as well as the following types of datasets:

·       Parcel fabrics

·       Feature-linked annotation

·       Geometric networks

·       Network datasets

·       Relationship classes

·       Terrains

·       Topologies

 

Users can store any size of data in this geodatabase. The default maximum size of datasets in file geodatabases is 1 TB. The maximum size can be increased to 256 TB for large datasets. File geodatabase size and name limits are as follows:

ü  File geodatabase size: No limit

ü  Table or feature class size: 1 TB (default), 4 GB or 256 TB with a keyword

ü  Number of feature classes and tables: 2,147,483,647

ü  Number of fields in a feature class or table: 65,534

ü  Number of rows in a feature class or table: 4,294,967,295

ü  Geodatabase name length: Number of characters the operating system allows in a folder name

ü  Feature class or table name length: 160 characters

ü  Field name length: 64 characters

ü  Text field width: 2,147,483,647

It is a great advantage for a user to be able to edit any complex or special data using the ArcGIS catalog. The reload operation of a GeoSWMM project geodatabase can be used to update the corresponding SWMM project.