(Source: NASA)
What is Remote sensing? | What is satellite remote sensing? | What is remote sensing and its types? | Remote sensing definition | Remote sensing Vs GIS
Remote sensing (RS) is a technique for collecting information about the Earth’s surface without physical contact. It is also known as Earth observation (observing the Earth from a high altitude to take a synoptic view of the Earth’s surface by satellite or aircraft).
These satellites and aircraft carry a special camera to collect the remotely sensed imagery (data) from a distance, which helps scientists, planners and researchers to observe the Earth’s surface without touching them.
Suppose, we have to identify the extent of the flood. Is it possible for humans to observe the extent of floods? No, not at all. But with the help of remote sensing satellites, we can easily identify the flooded area.
Similarly, this technology is helpful in urban development mapping, agricultural mapping and forest fire monitoring etc. Because remote sensing satellites are constantly improving the resolution of satellite images.
How many types of Remote sensing?
Types of Remote sensing: There are two types of remote sensing
- Active sensors have their own source of energy for the illumination. This sensor emits radiation towards the target object, which has to be investigated. The advantage of an active sensor is to investigate or measure the target at any time (day or night).
- Active sensors have their own source of energy for the illumination. This sensor emits radiation towards the target object, which has to be investigated. The advantage of an active sensor is to investigate or measure the target at any time (day or night).
Active sensor vs Passive sensor
What is GIS | GIS definition | GIS Full Form | GIS Meaning?
A Geographic Information System (GIS) is a computer system that storing, managing, analyzing and manipulating the geographic data.
This technology is designated to integrate all types of landscape features such as political boundary, topography, road network etc. GIS allows users to visualize, query and overlay geo-databases.
Overlaid Remote Sensing Image
In other words, we can say that GIS is a tool for handling Remotely sensed satellite images (data) to derive solutions for decision-makers.
GIS Software List | Satellite Image Processing Software | Remote Sensing Software | GIS Mapping Software
- ArcGIS
- ArcGIS Pro
- QGIS
- IGIS (1st Indigenous Software)
- MapInfo
- Erdas Imagine
- Geomatica
- Geomedia
- ILWIS
- GRASS GIS
- SAGA GIS
- ENVI
- Google Earth Engine (GEE)
Applications of Remote Sensing and GIS:
Remote Sensing and GIS (Remote Sensing application) is widely being utilized in various fields like Agriculture, Urban Planning, Natural Resource Management, Climate Change, Weather Forecast and Flood Mapping.
