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CHAPTER 6 Geographical Information System (GIS) - Coggle Diagram
CHAPTER 6
Geographical Information System (GIS)
Definition
GIS is a system for creating, managing, analysing and mapping various types of data. GIS links data to a map by combining location data with several forms of descriptive data.
GIS Application
3) Mapping densities.
It can be difficult to tell which locations have a higher concentration than others in areas with various features. - A density map allows to count the number of features using standard unit of measurement.
As an example, maps that shows the low population density had the highest rates of unhealthy behavior where men gathered more regularly in Sri Lanka.
4) Finding what is inside.
Individual items inside the area can be detected using GIS mapping software.
To illustrated, a hurricane path can be drawn on a map as an AOI. Then it will locate things on GIS map that were unlucky enough to get caught in the path of the hurricane which it may have been affected if they are within the AOI.
2.Mapping quantities.
People map quantities, such as where the most and least are, in order to locate places that fulfil their requirements and take action or see how places are related to one another.
This adds to the information provided by directly mapping the locations of features.
For instances, the number of college students in each state is shows on the map. Its essentially a quantity map with shades of brown, and darker brown shades indicating higher values.
5) Finding what is nearby.
The connection between a particular point on the map and a location within a certain distance can be discovered using GIS mapping tools.
For instance, measuring the impact of the earthquake in Taiwan which occurred 47 km distant to finding the connection between different areas.
1) Mapping where things are.
GIS can be used to map locations.
Through automated mapping, data collecting and surveying analytic tools, GIS enables for the creation of maps.
For example, there was GIS maps that displays where different sorts of diamonds are mined in the South Africa by color-coding each type.
6) Mapping change.
GIS can be used to map changes in a locations in order to forecast future circumstances, choose a course of action or assess the outcomes of a policy or activity.
For example, when it is necessary to keep track of deforestation LandViewer shows satellite photos of an area that has been deforested. The procedure is shown by a sequnce of change detection photos.
Advantages of GIS
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GIS allow viewing, questioning, understanding, visualizing and interpreting the data into numbers of ways which will reveal relationships, trends and patterns in the form of globes, maps, charts and reports.
Geographic Information System is to provide a help in answering questions as well as solve problems through looking at the data in a way which is easily and quickly shared.
GIS technology could also be integrated into framework of any enterprise information system.
Disadvantages of GIS
It as well requires enormous data inputs amount that are needed to be practical for some other tasks and so the more data that is to put in.
GIS layers might lead to some costly mistakes once the property agents are to interpret the GIS map or the design of the engineer around the utility lines of the GIS.
There might be failures in initiating or initiating additional effort in order to fully implement the GIS but there might be large benefits to anticipate as well.