Difference between revisions of "Geographical Information System"

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Geographical Information System (GIS) is a tool for analysis and presentation of spatial data. It is a collection of computer hardware, software and geographic data for capturing, managing, analyzing and displaying all forms of geographically references information.
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#Redirect[[Geographical Information System (GIS)]]
 
 
==What is GIS?==
 
[[Image:GISdefinition.jpg|thumb]]
 
;Simple definition : A Geographic Information System organizes large volumes of raw data into a map form for easy comprehension.
 
:GIS divides raw data into layers so it can give you a better understanding for the whole world.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
==Why is GIS unique?==
 
*GIS handles SPATIAL information
 
**Information referenced by its location in space
 
[[Image:Spatialinfo.jpg|400px|centre]]
 
 
 
==GIS functions==
 
*Data input
 
*Storage
 
*Management
 
*Analysis
 
*Output
 
 
 
===Storing data using Geodatabase===
 
*Geodatabase is a container for spatial and non- spatial data that can be organized in a certain structure.
 
*Advantages:
 
**provide a single, consolidated data storage for field measurements and all types of data used.
 
**Controlling data entry by applying validation rule on the attributes.
 
 
 
[[Image:Geodatabase.jpg|400px]]
 
 
 
==CZM and GIS==
 
*GIS stores all data relevant for the CZM
 
*GIS handles data on all spatial scales (North Egypt coast vs. a single harbour)
 
*GIS is a powerful analysis tool.
 
**Comparison of measurements from different years
 
**Overlay analysis of measurements and modelling results
 
[[Image:GISCZM.jpg|400px|centre]]
 
 
 
 
 
 
 
[[Image:GISCZM3.jpg|400px|centre|Coastal Zone management: GIS perspective]]
 
 
 
==Data types==
 
*DFS2 Data MIKE 21
 
*Dfs1 Data MIKE 21
 
*XYZ Data
 
*Wave time series & Rose
 
*Scanned Maps
 
*CAD drawing
 
'''Additional Data'''
 
*Land use
 
*Sediment classification
 
*Satellite images
 
*Geographical maps
 
*Reports (design, licenses, Site investigation)
 
*….etc.
 
 
 
 
 
==External links==
 
[http://en.wikipedia.org/wiki/Geographic_information_system Wikipedia: GIS]
 
 
 
[http://www.geo.ed.ac.uk/home/giswww.html GIS WWWW resource list] of servers likely to be of interest to the GIS community
 
 
 
[http://support.esri.com/index.cfm?fa=knowledgebase.gisDictionary.gateway GIS dictionary]
 
 
 
''8th January, Ulrik Lumborg and Caitlin Pilkington (caitlin.pilkington@gmail.com), DHI.''
 

Latest revision as of 15:54, 5 October 2021