Contents
Why do we use GIS?
A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earth’s surface. By relating seemingly unrelated data, GIS can help individuals and organizations better understand spatial patterns and relationships.
What does spatial View mean?
Spatial views are database views that contain a single spatial column. They are useful in organising your spatial data with other attribute data in a predefined way, in the same database or another database. They are also READ-ONLY, hence spatial views can not be edited via ArcMap.
How does versioning work in an ArcSDE geodatabase?
Versioning allows multiple users in a multiuser geodatabase to edit the same data without applying feature locks or duplicating data. As you edit the ArcSDE geodatabase, you work within your own view or geodatabase state; no one else sees your edits until you save them. In other words, two editors who edit simultaneously see only their own edits.
Can you have more than one geodatabase in ArcGIS?
With a file geodatabase, it is possible to have more than one editor at the same time provided they are editing in different feature datasets, stand-alone feature classes, or tables. The file geodatabase was a new geodatabase type released in ArcGIS 9.2. Its goals are to do the following:
What kind of data structure does ArcSDE use?
It is open and interoperable across multiple database management systems (DBMS) (Oracle, SQL Server, DB2, Informix, and PostgreSQL). It is standards based, using as its native data structure the OGC binary simple features standard and the ISO spatial type (for Oracle, IBM DB2, IBM Informix, and PostgreSQL only).
Is the ArcGIS Server still part of ArcSDE?
Beginning with ArcGIS 9.2, ArcSDE technology is still included in ArcGIS; however, it is no longer a separate product. Instead, ArcSDE technology has been integrated into both the ArcGIS Server and ArcGIS Desktop products.