REMOTE SENSING AND GEOGRAPHICAL INFORMATION SYSTEMS PDF

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PDF | Data derived from remote sensors are increasingly being utilized as a data source in geographic information systems (GIS). 𝗣𝗗𝗙 | Now-a-days the field of Remote Sensing and Geographical Information system (GIS) has become exciting and desirable with rapidly. 𝗣𝗗𝗙 | On Sep 1, , J F Olorunfemi and others published Remote Sensing and Geographic Information System in Development.


Remote Sensing And Geographical Information Systems Pdf

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INTRODUCTION. Now-a-days the field of Remote Sensing and GIS has become exciting and glamorous with rapidly expanding opportunities. Remote sensing and geographic information systems (GIS) are among the many useful Japanese manual(phonotadousmo.cf). 2. Abstract Remote sensing and Geographic Information Systems (GIS) play a fundamental role in hydrological applications. In this paper the most commonly used.

Ravindranet al. Google Scholar Prakash, R.

Pratap, Kamaleshwar, Ravindran, K. Pp — Google Scholar Roy, A. A discussion on Precembrain of Central India, Geol. India, spl. Google Scholar Singh, L.

Faster and more efficient: A GIS system is more efficient in terms of data processing due to the elaborate components in the system used to analyze the data. It requires less person, time and money: A GIS system is self-sufficient and can be used to analyze large datasets with much less time, money and resources.

A single person can analyze huge amounts of data to produce more complex information. Mostly used for data analysis: A GIS system is mostly used to analyze complex data and interpret the huge datasets into more meaningful information that can guide decision making.

Has a more simplified user interface: A GIS system is used by end users who can see a more simplified user interface that allows anyone to learn how to interpret the tons of data in the system. Is an ideal tool for communication between different departments: A GIS system is easy to use which makes it ideal to be used as a tool of choice to communicate between different departments because the interface is easily understood.

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Geographic information system

Share this: Applications of GIS in Tourism. Applications of GIS in Business.

Your thoughts here. The scale of a map and geographical rendering area representation type[ clarification needed ] are very important aspects since the information content depends mainly on the scale set and resulting locatability of the map's representations. A quantitative analysis of maps brings accuracy issues into focus. The electronic and other equipment used to make measurements for GIS is far more precise than the machines of conventional map analysis.

Main article: GIS file formats GIS data represents real objects such as roads, land use, elevation, trees, waterways, etc. Real objects can be divided into two abstractions: discrete objects e. Traditionally, there are two broad methods used to store data in a GIS for both kinds of abstractions mapping references: raster images and vector. Points, lines, and polygons are the stuff of mapped location attribute references.

A new hybrid method of storing data is that of identifying point clouds, which combine three-dimensional points with RGB information at each point, returning a " 3D color image ". GIS thematic maps then are becoming more and more realistically visually descriptive of what they set out to show or determine.

Data capture[ edit ] Example of hardware for mapping GPS and laser rangefinder and data collection rugged computer. The current trend for geographical information system GIS is that accurate mapping and data analysis are completed while in the field. Depicted hardware field-map technology is used mainly for forest inventories , monitoring and mapping. There are a variety of methods used to enter data into a GIS where it is stored in a digital format.

Special Issues

Existing data printed on paper or PET film maps can be digitized or scanned to produce digital data. A digitizer produces vector data as an operator traces points, lines, and polygon boundaries from a map.

Scanning a map results in raster data that could be further processed to produce vector data. Survey data can be directly entered into a GIS from digital data collection systems on survey instruments using a technique called coordinate geometry COGO.

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A current trend in data collection gives users the ability to utilize field computers with the ability to edit live data using wireless connections or disconnected editing sessions. This eliminates the need to post process, import, and update the data in the office after fieldwork has been collected.

This includes the ability to incorporate positions collected using a laser rangefinder. New technologies also allow users to create maps as well as analysis directly in the field, making projects more efficient and mapping more accurate.

Remotely sensed data also plays an important role in data collection and consist of sensors attached to a platform.

Differences between remote sensing and GIS

Sensors include cameras, digital scanners and lidar , while platforms usually consist of aircraft and satellites. Aircraft measurement software, accurate to 0. Helikites are inexpensive and gather more accurate data than aircraft. Helikites can be used over roads, railways and towns where unmanned aerial vehicles UAVs are banned. Recently aerial data collection is becoming possible with miniature UAVs.

Soft-copy workstations are used to digitize features directly from stereo pairs of digital photographs.Thematic maps in respect of geology, geomorphology. It supported a national coordinate system that spanned the continent, coded lines as arcs having a true embedded topology and it stored the attribute and locational information in separate files.

It can cope with unlimited and frequent data edits: A GIS system is designed to accept and analyze large amounts of data at any given time due to the large capacity of the software and an elaborate personnel system used to analyze the data. More robust and resistant to damage: Traditionally, there are two broad methods used to store data in a GIS for both kinds of abstractions mapping references: raster images and vector.

However, during , the recorded cases were 3, with 2 deaths up to February, Google Scholar Prakash, R. It therefore requires more skilled personnel to interpret the interface.