In terms of data management, since data is generally stored and managed based on a specific data model, and data models usually contain many specific sub-data models, such as points, lines, regions, networks, mosaic datasets, etc. Therefore, the first step of data migration is to replace other data models with the data models provided by SuperMap. In addition, these data are stored in personal, file, or database formats, so it is necessary to convert these storage media from other platforms into the corresponding databases provided by SuperMap for storage.

Therefore, data migration is divided into Data Model Migration and Geodatabase Migration.

Data Model

ArcGIS Data Model

Geodatabase is a data model that uses standard relational database technology and an object-oriented approach to represent geographic information. It supports storing and managing geographic information in tables of a standard database management system (DBMS), and organizes geographic data according to a hierarchical data object structure, including Object Classes, Feature Classes, and Feature Datasets. The Geodatabase can be regarded as a data management mode that integrates the storage and management of vector, raster, address, network, projection, and other data. Its representation of geographic spatial features is close to people's understanding of the real world.

SuperMap Data Model

In SuperMap GIS, datasets are used to store spatial objects of the same type and are one of the basic organizational units of spatial data. Currently, it supports point datasets, line datasets, region datasets, tabular datasets, network datasets, CAD, text datasets, route datasets, images, raster datasets, and many other types. For a detailed description of the SuperMap data model, please refer to SuperMap SDX+ Spatial Data Model.

Supported Data Types for Migration

Supported Data Properties for Migration

In ArcGIS, if data such as feature classes, attribute tables, or feature classes within feature datasets have configured information like domains and subtypes, this information will be automatically retained and migrated synchronously when migrating to SuperMap.

As shown in the figure below, when migrating a shoreline land classification management dataset, the domain information within the data is migrated along with it.

Figure: Domain Information Before Migration	Figure: Domain Information After Migration

Geodatabase

ArcGIS Geodatabases

ArcGIS geodatabase types include Personal Geodatabases, File Geodatabases, and Enterprise Geodatabases.

• Personal Geodatabase: It is the source data format for ArcGIS geodatabases stored and managed in Microsoft Access data files. The maximum size of this data file is 2 GB and it is only applicable to the Windows operating system.
• File Geodatabase: It is a collection of various types of GIS datasets stored in a file system folder. Each dataset is saved as a file, and the maximum file size can be extended to 1 TB.
• Enterprise Geodatabase (ArcSDE): It is a collection of various types of GIS datasets stored as tables in a relational database, with no limitations on size or the number of users. This type of database uses Oracle, Microsoft SQL Server, IBM Informix, or PostgreSQL for storage in relational databases.

SuperMap Geodatabase

SuperMap SDX+ is a spatial database engine. It can achieve integrated storage of GIS spatial geometry data and attribute data into various relational databases, enabling capabilities such as data editing, index management, and spatial querying. For a detailed description of SuperMap SDX+, please refer to SuperMap SDX+ Spatial Data Engine Special Topic Introduction.

• File-Based Engines

  The file-based engines supported by SuperMap SDX+ include: SuperMap's custom UDB/UDBX engines, Shapefile file engine, raw image files engine, vector tile file engine, etc. Among them, UDBX is an extension and enhancement of SuperMap's custom UDB engine, with more stable functionality. The UDB engine is the only file-based spatial data engine in SuperMap Objects' custom format. A data project for the UDB engine includes two files: the file with the UDB extension stores spatial data using OLE compound document technology; the file with the UDD extension is the attribute database, using the SQLite database format. Because UDB/UDBX files use compound document technology, UDB/UDBX files support the storage of both vector data and image data.

• Database Engines

  The database engines supported by SuperMap SDX+ mainly target relational database management systems such as Oracle, SQLServer, and Kingbase, as well as Alibaba's POLARDB and Huawei's GaussDB databases. It also supports PostGIS, the native spatial engine in PostgreSQL.

Supported Database Types for Migration

Related Topics

GDB Database Migration

MDB Database Migration

SDE Database Migration

SHP Data Migration