An environmental index is the combination of multiple sources of information (i.e., indicators of ecological responses) about an environmental system (e.g., a stream) from potentially varying attributes of that system (e.g., instream processes, ecological processes, species richness, riparian vegetation, etc.). Environmental indices are typically developed to provide an overall snapshot of some feature of the environmental system but they are also used to compare similar environmental systems. GIS can be used most effectively for environmental data analysis and planning. It allows better viewing and understanding physical features and the relationships that influence in a given critical environmental condition. Factors, such as steepness of slopes, aspects, and vegetation, can be viewed and overlaid to determine various environmental parameters and impact analysis. The information obtained from GIS help to study specific areas and monitoring can be done in and around those areas. It provides relevant information about the environmental condition and policy, including conservation programs. Maps in GIS provide the information of location and current resources.

We SPA ENVIS RP started a GIS based database creation of environmental Indices for Smart Cities across our country. Here, we use RS & GIS and satellite imagery to generate maps. We have selected four environmental parameters namely LST, NDVI, NDBI, NDWI which is common for all smart cities of India. Later on we will add more environmental parameters in the list. 

Name of the Smart City- Chennai, Tamil Nadu

Satellite Imagery Date/Month- March 2021