What Is GIS?
A geographic information system (GIS) is actually a system designed to capture, store, manipulate, analyze, manage, and present every type of geographical knowledge. The key to the current technology is geographic – this suggests that some portion of the info is spatial. In different words, the knowledge that’s in a way documented to locations on the earth.
Coupled with this knowledge is usually tabular information called attribute data. Attribute data is usually outlined as extra info regarding each of the spatial options. An example of this may be faculties. the particular location of the colleges is that the spatial data. extra data like the college name, level of education tutored, student capacity would compose the attribute data.
It is the partnership of these 2 data varieties that permits GIS to be such a good drawback determination tool through spatial analysis.
GIS is quite simple software. individuals and strategies are combined with a geospatial software system and tools, to modify spatial analysis, manage massive datasets, and show info in a map/graphical form.
What can we do with GIS?
GIS is used as a tool in each issues finding and decision-making processes, also as for visualization of data in an exceedingly spatial environment. Geospatial data is analyzed to determine:
- The placement of features and relationships to alternative features: At times it is of importance to map concentrations or a quantity normalized by area or total number.
Example: Mapping in an area for the number of polling booth to the density of the area.
2. Wherever the most or least of some feature exists: people map quantities, like where the most and least of a feature are, to find places that meet their criteria or to see the relationships between different places.
Example: Looking for an alcohol store in a big region like the USA, then highlighting counties on the basis of most numbered to least number.
3. The density of features in a given house: At times it is more important to map concentrations, or sorting a quantity by area or total number.
Example: Normalizing a map for population density.
4. What’s happening within a section of interest (AOI): we can make in use of GIS to find out what is happening or what is located within a specific area/region. We can find out the features of a region by creating specific criteria to define an area of interest (AOI).
Example: Mapping a region undergoing a flood situation, we can use tools like CLIP to find out the parcels fall within the flood, furthermore, we can also use attributes to parcels to determine the potential damages in the flood.
5. What’s happening near some feature or development area: we can find out what is happening in a set range of a feature or event by mapping what is nearby using geoprocessing tools like BUFFER.
Example: In a map of streets in a city we can add criteria like speed limits on different roads and streets to find out how far a vehicle can go within a set range of time.