Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on site observation. It also replaces costly and slow data collection on the ground, ensuring in the process that areas or objects are not disturbed. Its uses include different areas such as natural resource management, environment, agricultural land usage & conservation, and Defense & security and many more.Knowledge Spatial provide technical expertise, Software solution and services to the customers across government, industry, and academia, with focus on Indian and foreign satellite sensors’ capabilities, reliability, and accuracy.
Remote sensing is a sub-field of geography. Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on site observation. In modern usage, the term generally refers to the use of aerial / satellite sensors technologies to detect and classify objects on Earth (both on the surface, and in the atmosphere and oceans) by means of propagated signals (e.g. electromagnetic radiation). Remote Sensing may be classified into active remote sensing (when a signal is first emitted from aircraft or satellites) or passive (e.g. sunlight) when information is merely recorded.
Passive sensors gather radiation that is emitted or reflected by the object or surrounding areas. Reflected sunlight is the most common source of radiation measured by passive sensors. Examples of passive remote sensors include film photography, infrared, charge-coupled devices, and radiometers. Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LIDAR are examples of active remote sensing where the time delay between emission and return is measured, establishing the location, speed and direction of an object.
Remote sensing makes it possible to collect data of inaccessible areas. It also replaces costly and slow data collection on the ground, ensuring in the process that areas or objects are not disturbed. Its uses include different areas such as natural resource management, agricultural land usage & conservation, and Defense & security and many more.
Some of the applications of remote sensing data :
Stereographic pairs of aerial photographs or satellite imageries have often been used to make topographic maps and large scale digital cartographic databases.
Multi-spectral sensor such as Indian Resourcesat satellites LISS-III (Linear Imaging Self Scanning Sensor) take images in multiple wavelengths of electro-magnetic radiation (multi-spectral). Maps of land cover and land use from thematic mapping can be used to prospect for minerals, detect or monitor land usage, deforestation, and health of plantations and crops. Weather satellites provides imageries for analyzing in Meteorology and climatology related phenomena.
Interferometric synthetic aperture radar Indigenous RISAT-1 data is used to produce digital elevation models (DEM) of large scale terrain. Doppler radar is used by local law enforcements’ monitoring of speed limits and in enhanced meteorological collection such as wind speed and direction within weather systems in addition to precipitation location and intensity.
Light detection and ranging (LIDAR) is well known in examples of weapon ranging, laser illuminated homing of projectiles. LIDAR is used to detect and measure the concentration of various chemicals in the atmosphere, while airborne LIDAR can be used to measure heights of objects and features on the ground more accurately than with radar technology. LIDAR has principal application in Forestry.
Hyperspectral imageries are used in various applications including mineralogy, biology, defence, and environmental measurements. It produces an image where each pixel has full spectral information with imaging narrow spectral bands over a contiguous spectral range.
Remote sensing allows to monitor risk areas in the long term, to determine desertification, environment and climate change factors, to support decision-makers in defining relevant measures of environmental management, and to assess their impacts to combat against it.
Radiometers and photometers are the most common instrument in use, collecting reflected and emitted radiation in a wide range of frequencies. The most common are visible and infrared sensors, followed by microwave, gamma ray and rarely, ultraviolet. They may also be used to detect the emission spectra of various chemicals, providing data on chemical concentrations in the atmosphere.
Organization employing the best tools and techniques to carry out projects of observing and understanding the world around us, thus expanding our knowledge of the Earth. Provide technical expertise, Solution and services to the customers across government, industry, and academia, with focus on Indian and foreign satellite sensors’ capabilities, reliability, and accuracy. Some of them from open source tecnology are mention here.
OPTICKS Digital Image Processing Software
Opticks is an expandable remote sensing and imagery analysis software platform that is free and open source. If you are interested you can learn about the history of Opticks.
If you’ve used commercial tools like: ERDAS IMAGINE, RemoteView, ENVI, or SOCET GXP, then you need to give Opticks a try. Unlike other competing tools, you can add capability to Opticks by creating an extension. Opticks provides the most advanced extension capability of any other remote sensing tool on the market.
GIMP Image Manipulation Software
GIMP is a freely distributed software for such tasks as photo retouching, image composition and image authoring.
It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.
GIMP is expandable and extensible. It is designed to be augmented with plug-ins and extensions to do just about anything. The advanced scripting interface allows everything from the simplest task to the most complex image manipulation procedures to be easily scripted.
E-foto Digital Photogrammetry Software
E-foto provides the full implementation of a digital photogrammetric workstation as free software.E-foto Software possess photogrammetric functionalities that allow the development of professional topographic tridimentional mapping projects, by using as data sources aerial photogrammetric images obtained by both analog cameras and digital sensors.