GIS & Remote Sensing

GIS for Generation of Population map GIS is a versatile tool, which can be used to create, edit, analyse and display data/information as per user requirements. As it is known that GIS can be used to create data for natural resources as well as for human induced activities. But this is not limit of GIS for creation of data, instead of these GIS can be used to create demand and supply for transport system, master planning, Covid Cases mapping etc. But to create all these above GIS layers, one should have population data as a key input of GIS database in the process.  The population data can be collected by census portal or purchased from census office. Census department provide population data at all levels or unit for users such population data at state level, population data at district level, population data at city level, population data at ward level, population data at tehsil level, population data at village level etc. So one can create population data at any level as per object

  Database creation using GIS of Phagi Block, Jaipur      GIS is a versatile tool which can be used for different applications whether for natural resource management or management of manmade/human/anthropogenic induced activities. To manage resources or map, one need to have reliable source of information to use as input in GIS.       This reliable information can be collected either by physical survey or existing accurate database. These collected database can be used in GIS for creation of spatial or non-spatial database. With this different digital map layers can be generated in GIS for specific project area based on different input data formats such as survey data, field sample data, existing maps and satellite based data.      These GIS layers in the form of Map can be used for data analysis, data management as well as for planning and monitoring. It is true all the database in excel etc. can be used for data analysis, data management as well as for planning and monitoring but

Vector Data Model As discussed in raster data article that earth surface features can be created in both raster and vector format as per requirement of user.  For example wetland mapping feature such as pond can be created in both data formats, in vector as polygon and grid/pixels format in raster.  Vector Data Model is an object based approach to the representation of real world features. This data model is best suited to represent discreet objects.  In this method the entire earth surface feature including man-made and natural can be represented by only three entities in GIS . These entities name- Point Line  Polygon In this all the features in which only locations is presented than Point entity used for representation in GIS software , However for representation of all linear features, line entity used in GIS tools .  To represent any enclosed feature of earth and representation of any feature which has area entity, in that case, polygon entity is used in vector data.

Raster Data Formats used in GIS and Remote Sensing Earth surface features including man-made features can be represented in GIS and remote sensing processes as spatial data. Spatial Data in GIS and remote sensing has two primary data formats to create information Raster Vector Earliest GIS software was either Raster based or Vector based, but now most of the GIS software has data processing capabilities in both formats. Advances in computer technology have largely eliminated the boundaries between Raster and Vector data for GIS applications .  An integrated raster and vector data working environment provides many more opportunities as one can combine the mathematical methods and simulations suitable for both the formats in the analysis. Both formats have their advantages and disadvantages. RASTER DATA Raster data have become the primary source of spatial data in geographic databases and are used increasingly in a wide variety of GIS applications .   Raster data def

Geo-Spatial Data - Spatial and Non-Spatial Data Data is raw form of information, which is given to the computer for processing. However, database is an organized collection of related data. Database should be integrated, structured and shared.  So here we can say that GIS is both a database system with specific capabilities for spatially referenced data as well as a set of operations for working with the data.  GIS database consist of sets of information called Layers. Each layer represents a particular type/class of geographic data. For example, one layer may include information on the road network in an area as line layer .  Another layer may contain information on the land use in that area as polygon layer , while another records soil, elevation etc. The GIS can combine these layers into one image, showing how the road network, land use , soil, and elevation relate to one another. Engineers/ Scientists might use this image to determine areas with more urban growth/