gis concepts 4/5
DESCRIPTION
Introduction to basic concepts on Geographical Information SystemsAutor: Msc. Alexander Mogollón Diazhttp://www.agronomia.unal.edu.coTRANSCRIPT
Concepts and Functions of
Geographic Information Systems(4/5)
MSc GIS - Alexander Mogollon Diaz
Department of Agronomy
2009
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Concepts and Functions of GIS
.PPT Topic #1 Topic #2 Topic #31 A GIS is an information
systemGIS is a technology
2 Spatial Data modelling Sources of data for geodatasets
Metadata
3 Geo-referencing Coordinate transformations
4 Database management
5 Spatial Analysis
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Functionalities of GIS
INPUT
QUERY - DISPLAY - MAP
ANALYSE
STRUCTURE
MANAGE
TRANSFORM
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Databases are managed with a DBMS
• DBMS =– DataBase Management System– Software
• Management =– Definition and update of the DB-structure– Add, remove, replace data– Secure, limit access– Retrieve specific data – Copy, ...
• MS-Access as an example – DBMS extended with computing and reporting functions
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Also gDB are managed with a DBMS
A/D conversion
Structuring
Computing functions
Other functions
Data collection Database Information System
Managed with DBMS
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polygon
line
point
TIN
categoric raster
image
lattice
Hybrid GISDBMS for geometry <> DBMS for attributes
Specific (file-based) DBMS
Standardised (relational) DBMS
Arc-InfoArcView – dBase/Access
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polygon
line
point
TIN
categoric raster
image
lattice
Integrated/Universal GIS DBMS for geometry <> DBMS for attributes
Standardised (relational) DBMS
Example: •COTS: Personal (MS-ACCESS) and Professional (ORACLE, INFORMIX, DB2, ...) geodatabases for ArcGIS•FOSS: PostGreSQL with PostGIS
Questions or remarks ?
Thank you …