FAQ (Frequently Asked Questions)

1. What is GIS?
​Geographic Information System (GIS) is a computer based information system designed to accept large volumes of spatial and non spatial data derived from variety of sources and to efficiently store, retrieve, analyze, model and display (output) these data according to user defined specifications.
2. How does GIS work?

GIS works by integrating various types of data, both spatial and attribute, into a digital system. It uses specialized software to store, manipulate, analyze, and display geospatial data. GIS software enables users to create maps, perform spatial analysis, query data, and generate reports or visualizations based on the data's geographic relationships.

3. What are the main components of GIS?
The main components of GIS are hardware, software, data, people and methods
4. What are the different types of data in GIS?
1. Spatial component: Where is it?
​-Vector (Point, Line and Polygon)
-Raster (Image and Grid)
-TIN

Spatial Data : Spatial data refers to data that represents the geographic locations, shapes, and characteristics of objects or phenomena on the Earth's surface. It focuses on the spatial relationships and positions of features in a given area. Spatial data can include various types of geographic entities, such as points (e.g., coordinates of a specific location), lines (e.g., road networks or rivers), polygons (e.g., land parcels or administrative boundaries), and more complex geometries. Spatial data is typically represented using coordinate systems and can be visualized and analyzed within a GIS to gain insights and make informed decisions about geographic phenomena.

2. Non-spatial/Attribute component: What is it?
Non-spatial Data: Non-spatial data, also known as attribute data or descriptive data, refers to information that provides additional context or characteristics about the spatial features. It describes the attributes or properties associated with the spatial data but does not inherently possess any spatial coordinates. Non-spatial data can include various types of data, such as textual descriptions, numeric values, categorical classifications, or any other relevant information related to the features. It is typically stored in tables or databases and can be linked to spatial data through unique identifiers. Non-spatial data is crucial for understanding and analyzing the attributes, relationships, and behaviors of geographic features in a GIS.
5. What is Vector Data?
Vector data represents geographic features as discrete objects with precise boundaries. It uses points, lines, and polygons to represent the spatial entities on the Earth's surface. Each object is defined by its geometric coordinates (x, y) and can be associated with attributes stored in a table.

Points: Represent specific locations or single entities, such as the coordinates of a building or the location of a city.

Lines: Represent linear features, such as roads, rivers, or boundaries. They are composed of a series of connected points.

Polygons: Represent enclosed areas, such as land parcels, administrative boundaries, or lakes. They are defined by a series of connected lines forming a closed shape.
6. What is Raster Data?

Raster data represents spatial information as a grid of cells or pixels of imagery, where each cell contains a value representing a specific attribute or property. It is used to represent continuous phenomena or surfaces, such as elevation, temperature, or satellite imagery.

7. What is a Web GIS Portal?
A Web GIS Portal is an online platform that allows users to access and interact with geographic information system (GIS) data and tools through a web browser.
8. What can I do with a Web GIS Portal?
With a Web GIS Portal, you can perform tasks such as viewing and querying maps, analyzing spatial data, creating custom maps, collaborating with others, and sharing maps and data online.
9. Do I need any special software to use a Web GIS Portal?

No, you don't need to install any specialized software. A web browser with internet access is all you need to access and use a Web GIS Portal.

10. How do I create an account on the Web GIS Portal?

Go to "Register now" link on the Login tab of portal's homepage, and follow the instructions to provide the required information.

11. How can I log in to the portal?
​User has to first register/create account on GIS Portal than able to access/login GIS Portal. After registration enter Username and password to login into the portal.
12. I forgot my password. How can I reset it?
​Typically, there is a "Forgot Password" link on the login page of the Web GIS Portal. Click on that link and follow the instructions to reset your password.
13. What is the usage of Map tools?

Map tools are used for zoom in, zoom out, zoom to map, draw, measure, scale and print functionalities.

14. What is the usage of GIS tools?

GIS tools are used for analysis and visualization of GIS data like changing basemap, zoom level, swipe, identify, query, coordinate search and picker, current location, around me, direction and bookmark.

15. How can I know more about Tools functionalities?

Visit help button after login into Web Application and refer user manual provided on it.

16. How can I give the feedback here?

Go to feedback tab provided on portal's home page, and follow the instructions to provide the required information.

17. How can I logout from the portal?

To logout from the portal, go to the user profile in the upper right corner and click on logout.

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