Definition of GIS,Remote Sensing and Image processing

Category
Other
Output Type
Information/Fact
TAG
GIS
Type of Message *
Message
Cover Feature
GIS is defined as Geographic Information System.It is a tool to represent and/or retrieve data spatially.The spatially linked data are generally stored in a Geo-referenced database.

Remote Sensing is a procedure to capture image of a remote object by various type of optical/thermal/sound wave active/passive sensors.Active sensors send an artificial signal (microwave or sound pulse) and capture the image by sensing the reflectance of the same where as passive sensors only detects or absorb light or any other naturally available energy signal reflected from the target object.

Whereas Image Processing can be defined as the retrieval of information from an image by converting the same into DN values shown within the pixels(units which constitutes a raster image) of the image.
Summary
Active sensor detect artificial energy (microwave) whereas passive sensors captures natural energy reflected from an object(sunlight)

Comments

Post a Comment

Popular posts from this blog

Geospatial Jobs Portal : If you are in GIS subscribe to this newsletter

In recent years, India has graduated thousands of students in the field of GIS and Remote Sensing. The issue is that these graduates are unable to find work in their field of expertise. On the other hand, many GIS start-ups have been launched. Employees with desired GIS expertise are scarce in these organizations. Today, I'd like to propose a newsletter that serves as a link between start-up companies looking for ideal employees and recent GIS graduates. The URL is https://geospatial.substack.com/?nthPub=321 This newsletter publishes Situation Wanted opportunities in the field of GIS on a regular basis. Thanks, @Mrinmoy
Read more

Five steps to convert paper maps to digitized data driven interactive spatial application

Image
Any paper maps can be converted into the digitized data-driven interactive geospatial application by following the five steps as given below : 1) Scan the map into TIF 2) Import into DIVA-GIS 3) Create shapefiles for Placemarks, Pipelines or Roads or River and Some Area like Ponds, lakes, stadiums, etc. 4) Create Attribute Tables linked to the shapefiles 5) Export the tables and the shapefiles into an AppConverter to produce interactive Geospatial Application The entire procedure or the steps of digitization of maps by DIVA-GIS is explained in the presentation that can be accessed by clicking in the link . or view the video about the same presentation. If any terms like shapefile or attribute table are not clear or known to you then see this presentation . Founding and Honorary Editor Innovative for Sustainability http://www.baipatra.ws The Water, Energy and Informatics Group
Read more

What's in the News about GIS from 1st to 8th July 2022

Image
RailTel and Esri India ink pact to offer unique Cloud-based GIS solutions Esri India Quote on India’s Biggest Drone Festival – Bharat Drone Mahotsav 2022 Lidar data collected across Yellowstone and Park County, Montana, was used to aid the response to flooding last month. Klau Geomatics Launches GNSS and IMU Processing Solution for UAV Mapping " But the main hurdles are the lack of awareness among potential users and inadequate skilled manpower  " The Geospatial Commission will prioritize rolling out the National Underground Assets Register next year, according to a recent report detailing its progress in delivering the UK’s Geospatial Strategy. With the help of cutting-edge surveying technology, the Nepal Survey Department measured the height of Sagarmatha, or Mount Everest, and will soon reveal how high the world’s highest mountain is. Access my blog or look at my homepage to know more about me. You can also subscribe to my newsletter . My Youtube Channel on GIS can be fo
Read more