Nhóm thực hiện: nhóm 1 Nguyễn Ngọc Trường Trần Minh Khang Bùi Quốc Huy Nguyễn Ngọc Linh Nguyễn Thành Phương Trần Hưng Nghiệp Đoàn Đình Phúc

1. DEFINITIONS of geodatabase 2. ELEMENTS of geodatabase 3. TYPES of geodatabase 4. OBJECTS of geodatabase 5. TRANSACTIONS of geodatabase 6. XML of geodatabase 7. ARCHITECTURE of geodatabase 8. DESIGNING of geodatabase

What is the geodatabase? A geodatabase is a database designed to store, query, and manipulate geographic information and spatial data. It is also known as a spatial databasedatabase

 In addition to being a physical instance of a collection of datasets, each geodatabase has some key additional aspects: Geodatabases have a comprehensive information model for representing and managing geographic information. Geodatabase software logic provides the common application logic used throughout ArcGIS for accessing and working with all geographic data in a variety of files and formats. Geodatabases have a transaction model for managing GIS data workflows.

 The geodatabase storage model is based on DBMS principles leveraging a series of simple yet essential relational database concepts.

 Key concepts include Data is organized into tables. Tables contain rows. All rows in a table have the same columns. Each column has a type, such as integer, decimal number, character, date, and so on. Relationships are used to associate rows from one table with rows in another table. This is based on a common column in each table. Relational integrity rules exist for tables. For example, each row always shares the same columns, a domain lists the valid values or value ranges for a column, and so on.

 For ArcSDE geodatabases that are held in relational databases, a number of additional DBMS capabilities also apply: SQL, a series of relational functions and operators, is available to operate on the tables and their data elements. The SQL operators are designed to work with the generic relational data types, such as integers, decimal numbers, dates, and characters.

 The geodatabase application logic includes support for a series of generic GIS data objects and behaviors such as feature classes, raster datasets, topologies, networks, address locators, and much more.

This multitier geodatabase architecture is sometimes referred to as an object- relational model.

 Pesently, all DBMSs include spatial type support for geodatabases using ArcGIS as follows: Oracle using the ArcSDE Spatial Type (ST_Geometry) or optionally the Oracle Spatial type IBM DB2 using the Spatial Extender Geometry Object Informix using the Spatial DataBlade Geometry Object PostgreSQL using the ArcSDE Spatial Type (ST_Geometry) or PostGIS geometries Microsoft SQL Server using Microsoft spatial types, geometry and geography