1 / 29

GIS ＆ Internet

GIS ＆ Internet. Setting up and Maintaining Online Geographical Database. Contents. Setting up Online Geographical Database. Maintaining Online Geographical Database. Setting up Online Geographical Database. Database Geo-database Online database DBMS Metadata Clearinghouse

ull
Download Presentation

GIS ＆ Internet

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GIS ＆ Internet Setting up and Maintaining Online Geographical Database

  2. Contents Setting up Online Geographical Database Maintaining Online Geographical Database

  3. Setting up Online Geographical Database Database Geo-database Online database DBMS Metadata Clearinghouse ESRI Geodatabase SDE

  4. Database (DB) • A collection of information organized in such a way • that a computer program can quickly • select desired pieces of data

  5. Record point 6459844.23 1342624.26 Field

  6. Database Management System (DBMS) • A collection of programs that enables you to • Enter • Organize • Select data • in a database

  7. Major Enterprise DBMS Vendors IBM Corp. Informix Corp. Oracle Corp. Sybase Inc. etc. All support GIS database

  8. Geographical Database / (GIS DB) • A database for storing spatial data

  9. Online Database • Databases available • to anyone who could link up to them • by computer network worldwide

  10. Metadata • Data about data • A summary document providing content, • quality, type, creation, and spatial information • about a data set

  11. Usage of Metadata Locate, interpret and use data Provide an inventory of data assets Help determine and maintain the value of data Help determine the reliability and currency of data Support decision - making Documents legal issues Help keep data accurate help verify accuracy to support good decision – making Help determine budgets and cost savings

  12. Standards FGDC (Federal Geographic Data Committee) ISO (International Organization for Standardization )

  13. Clearinghouse • A collection of servers • Search for metadata on datasets over the web • Data: producer, user, manager

  14. Web Resources Data Server Computed Links App. Server Clearinghouse Upload data Interactive maps Metadata Documentation Register data Download Search Producer Users

  15. ESRI Metadata Services • ArcGIS, ArcCatolog • Creating, authoring metadata and • sending to a metadata service • ArcIMS • Hosting metadata service • ArcSDE • interface to RDB storing metadata documents • ArcCatolog, Metadata Explorer, Web Browsers, Z39.50 Client • Access to metadata

  16. ESRI ArcIMS Metadata Service

  17. ESRI Geodatabase & SDE • Geodatabase • A physical store of geographic information • inside a database management system (DBMS) • All data is stored together in a commercial DBMS • (IBM DB2, Informix, Oracle, or Microsoft SQL Server) • Allows multi-user access to continuous databases • through the use of versioning and long transactions • Supports advanced capabilities • Geodatabases can be accessed via the standard menus • and tools in ArcCatalog, ArcMap, and ArcToolbox

  18. SDE Allows spatial data -- points, lines polygons and their associated attributes to be stored in a standard relational database

  19. GIS Data Files DBMS HTMLJavaActiveX ArcExplorer Internet Map Server SDE Server Architecture of SDE

  20. Contents Setting up Online Geographical Database Maintaining Online Geographical Database

  21. Maintaining Online Geographical Database Data Updating Data Security

  22. Data Updating • Always backup the data before the update of the data • Always check the data before issuing a commit • Always know what rows are going to be updated

  23. Maintaining Online Geographical Database Data Updating Data Security

  24. Data passes when requested by authenticated user Additional protection on ports and protocols Web/App. Servers Limitation on ports and protocols Load balancing Block the prevalent virus Firewalls Routers Data Security Security Protection Layers

  25. Virus Scanning Latest version Updated daily Automatically clean any infected files

  26. HTTP SMTP Telnet FTP SSL TCP/ IP SSL Data Encryption SSL --- Secure Socket Layer App. Protocol Connection Protocol

  27. SSL Data Encryption A protocol providing encrypted communications on the Internet. Information exchanged between a user and GIS internet servers should not been intercepted by unauthorized third parties.

  28. Data Backups and Restores Physical data security Permissions User access levels

  29. User Access Levels System Administrator Supervisor Editor Auditor Remote Viewer Database Operator

More Related