Gis Concepts 4/5

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Introduction to basic concepts on Geographical Information Systems
Autor: Msc. Alexander Mogollón Diaz
http://www.agronomia.unal.edu.co

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Gis Concepts 4/5

  1. 1. Concepts and Functions of Geographic Information Systems (4/5) MSc GIS - Alexander Mogollon Diaz Department of Agronomy 2009
  2. 2. Concepts and Functions of GIS .PPT Topic #1 Topic #2 Topic #3 1 A GIS is an information system GIS is a technology 2 Spatial Data modelling Sources of data for geodatasets Metadata 3 Geo-referencing Coordinate transformations 4 Database management 5 Spatial Analysis
  3. 3. Functionalities of GIS INPUT QUERY - DISPLAY - MAP ANALYSE STRUCTURE MANAGE TRANSFORM
  4. 4. Databases are managed with a DBMS <ul><li>DBMS = </li></ul><ul><ul><li>DataBase Management System </li></ul></ul><ul><ul><li>Software </li></ul></ul><ul><li>Management = </li></ul><ul><ul><li>Definition and update of the DB-structure </li></ul></ul><ul><ul><li>Add, remove, replace data </li></ul></ul><ul><ul><li>Secure, limit access </li></ul></ul><ul><ul><li>Retrieve specific data </li></ul></ul><ul><ul><li>Copy, ... </li></ul></ul><ul><li>MS-Access as an example </li></ul><ul><ul><li>DBMS extended with computing and reporting functions </li></ul></ul>
  5. 5. Also gDB are managed with a DBMS A/D conversion Structuring Computing functions Other functions Data collection Database Information System Managed with DBMS
  6. 6. Hybrid GIS DBMS for geometry <> DBMS for attributes polygon line point TIN categoric raster image lattice Specific (file-based) DBMS Standardised (relational) DBMS Arc- Info ArcView – dBase/Access
  7. 7. Integrated/Universal GIS DBMS for geometry <> DBMS for attributes polygon line point TIN categoric raster image lattice Standardised (relational) DBMS <ul><li>Example: </li></ul><ul><li>COTS: Personal (MS-ACCESS) and Professional (ORACLE, INFORMIX, DB2, ...) geodatabases for ArcGIS </li></ul><ul><li>FOSS: PostGreSQL with PostGIS </li></ul>
  8. 8. Questions or remarks ? Thank you …

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