Showing posts with the label GIS Intro

Advantages of Geographical Information System (GIS)

Advantage of Geographical Information SystemGIS is very advantageous system/tool especially in geographic location based studies and planning. GIS is an integration of many system and methods that make GIS advantageous over the traditional process of geospatial data creation, analysis and display. GIS has several advantages over the other systems such computer aided design and drawing (CADD), automated mapping (AM) etc. 
Below are advantages over other systems Advantage over Tradition Maps (Printed Maps)Traditional Maps have to be printed and in relatively large formats. Although maps can be compiled into an Atlas but they are not seamless and one has to compare one page of Atlas with another. All the maps have to be printed at fixed scales. Maps cannot provide all the annotation details in the legend with respect to shading and place names.
Maps always have a scale bar, even though it is still not easy to calculate the lengths of features represented on the map and whereas it is difficu…

Functions and Uses of GIS

Functions of GIS
GIS comprises many functions and these functions can be used in variety of applications. The GIS functions facilitate some basic reply those are below. The GIS process provides location based information, which helps to locate the particular location of objects. The location can be defined by longitude and latitude or X/Y and this also can have attribute information such as place name etc.The GIS functions also support to find the locations under certain conditions such as industries within 5 km from the sewerage treat plant.These functions also help to assess the changes on specific location over the time.It also supports to analyze the spatial relationship among objects with their geographic locations. The functions also provide model based queries, such as optimum path, suitable land for industry development etc.
Data Collection and CaptureRemote sensing images, existing maps, tabular data, ground survey, internet etc. are used to collect data as input data to GIS pro…

Applications of GIS

Application of Geographical Information System (GIS)This article is showing application of Geographical Information System (GIS) in different fields. Geo-spatial data: It can be used to map the spatial location of real-world features and visualize the spatial relationships among them. Map features are logically organized into a set of layers or themes of information. Common considerations for organizing layers are- Feature Type: Typically, points, line and polygon features are stored in separate layers.Logical Group: Features are organized logically by what they represent.Intended use: organized application specific Geo-visualization represents a set of tools or techniques used to view, analyze, edit and assess the geographic features and their relationships on the earth’s surface. It does not only offer the possibility to show past developments, but also to visualize possible future scenarios based on current decisions.
Geo-processing is a set of information transformation tools used to…

Introduction of GIS

Geographical Information System (GIS) is an integrated tool, capable of mapping, analyzing, manipulating and storing geo-spatial data in order to provide solutions to real world problems (For example: logistics, emergency evacuation, and tax assessment, real estate analysis etc.) and help in planning for the future.

Importance of GIS GIS is a computer-based tool that allows you to integrate different kinds of geographic information such as satellite images, aerial photographs, digital maps, and global positioning system data (GPS), along with associated tabular database information. GIS not only helps you to examine and analyze geographic information at different levels of detail; but also allows the user to perform statistical analysis or spatial analysis. Predictions for the future can also be done using GIS models in the areas of land-use change, urban sprawl, habitat loss, and to predict seismic activity precisely.

Components of GIS
Fig. Diagrammatic View of GIS Components

Hardware : H…