Remotely sensed satellite images and data include spectral, spatial and temporal resolutions. Spectral statistics involves elements of remotely sensed image classification. The main aspect which influences the accuracy of ground object is spatial resolution. Temporal resolution helps in generation of land cover maps for environmental planning, land use change detection and transportation planning. Data integration and analysis of urban areas using medium resolution remote sensing imagery mainly focuses on documentation of built up areas or is used for differentiating between residential, commercial and industrial zones.
1. Providing a base map for graphical reference and assisting planners and engineers
The amount of details that an orthoimagery produces using high resolution satellite imagery is of immense value as it provides a detail image of the selected area along with its surrounding areas.
As maps are location-based they are specifically designed to communicate highly structured data and to give a complete picture about the whole world.There are numerous applications of satellite imagery and remote sensing data. Today nations use information derived from the satellite imagery for government decision making, civil defense operations, police, and Geographic Information Systems (GIS) in general.These days, data captured through Satellite Imagery has become mandatory and all government plans areto be submitted on the basis of Satellite Imagery data.
2. Extracting mineral deposits with remote sensing based spectral analysis
During the pre-feasibility and feasibility stages of the mineral exploration, it is important to know about the mineral potentiality of the area to be considered for mineral extraction. In such scenarios, satellite remote sensing based mapping and its integration in a GIS platform help geo scientist to map the mineral potential zones easily by saving time. With the help of spectral analysis of satellite image bands the scientist can quickly identify and map mineral availability through special indicators. This will enable exploration geologist to narrow his geo physical, geo chemical and test drilling activities to high potential zones.
3. Disaster mitigation planning and recovery
The result of a natural calamity can be devastating and at times difficult to assess. But disaster risk assessment is necessary for rescue workers.This information has to be prepared and executed quickly and with accuracy. Object-based image classification using change detection (pre- and post-event) is a quick way to acquire damage assessments data. Other similar applications using satellite imagery in disaster Assessments include measuring shadows from buildings and digital surface models.
4. Agriculture Development
With increasing population across the world and the need for increased agricultural production there is a certain need for proper management of the world’s agricultural resources.To make this happen it is first necessary to obtain reliable data on not only the types, but also the quality, quantity and location of these resources. Satellite imagery and GIS (Geographic Information Systems) will always continue to be a significant factor in the improvement of the present systems of acquiring and generating agricultural maps and resource data. Agriculture mapping and surveys are presently conducted throughout the world, in order to gather information and statistics on crops, range land, livestock and other related agricultural resources.
This information collected is necessary for the implementation of effective management decisions. Agricultural survey is needed for planning and allocation of the limited resources to different sectors of the economy.
5. 3D GIS
3D city models are digital models of urban areas that represent Terrain surfaces, sites, buildings, vegetation, infrastructure and Landscape elements as well as related objects belonging to urban areas. Their components are described and represented by corresponding two-dimensional and three-dimensional spatial data and geo-referenced data. 3D city models support presentation, exploration, analysis, and management of tasks in a large number of different application domains. 3D GIS is the instant and effective Solution for larger and remote locations where manual survey is next to impossible. Various urban/ rural planning departments require3D GIS data like, Drainage, Sewerage,
Water supply , Canal Designing BIM and may more.