This document provides an overview of concepts and functions of geographic information systems (GIS). It discusses how GIS is an information system that uses spatial data and modeling. It also describes the key functionalities of GIS, including input, query, display, analysis, and management of geospatial data and transformations. Databases that store geospatial data are managed through database management systems to allow for definition, updating, retrieval, and other functions for both vector and raster data in GIS.

1. Concepts and Functions of Geographic Information Systems (4/5) MSc GIS - Alexander Mogollon Diaz Department of Agronomy 2009

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. Functionalities of GIS INPUT QUERY - DISPLAY - MAP ANALYSE STRUCTURE MANAGE TRANSFORM

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. 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

8. Questions or remarks ? Thank you …