GIS & Remote Sensing

Ground Water Level Prediction using Geospatial Technology and Mathematical Models Ground water studies play significant role in monitoring and planning of water resources for water supply for day to day requirements. Surface water resources are limited and completely depends upon the rainfall scenario. If good rainfall then the surface water resources such as pond, lake and dam can provide water to cater population for longer period. But in case of low rainfall, the scenario will be reverse, less water availability in pond, lakes and dams to supply water. This less rainfall scenario exert the pressure on ground water availability and in areas where no proper water supply system exists, those are also dependent on ground water availability. Ground water availability and its quality plays important role in its uses for drinking and agricultural purposes. Ground water availability defined by ground water level, which defined the depth of water table. Ground water level data coll

Rainfall data Analysis Using ARC/GIS GIS software can be used to generate rainfall data to detect the change in annual precipitation. This spatial rainfall data can also be used as input data in different simulation models such as hydro-logical  modelling, runoff modelling etc.  Rainfall data collected from rainfall data collection center  and usually there are three to four rainfall stations in a city but for simulation models one requires continuous data/layer. Therefore GIS functions allow to generate continuous layer of rainfall data which can be used for simulation. Daily rainfall data was collected from the ground water reports of Rajasthan for six rainfall stations namely Chaksu, Phagi, Sanganer, Mozmabad, Tonk and Malpura. These are located in and around the Phagi tehsil, thereafter location of these rainfall station were plotted in ArcGIS.  Spatial analyst tool of ArcGIS software was used for data interpolation. Rainfall data were interpolated using inverse distan

Location of Government Schools in Phagi Tehsil Locations database mapping play very important role in management and allocation of resources as well as to find the proximity of resources for better management. Location based data allow to measure distances between spatial feature whether natural or man-made.  These location data also allow establishing relationship between spatial features through proximity analysis process in GIS. One can find the impact of availability of amenities on urban growth or find the impact of pond on changes in agriculture activities in study area. Location database are very commonly used by different app or websites such as food delivery apps to locate the delivery destination and tracking, cab services apps to locate cab and to find and tracking cab and different map based apps and website to find location of all the man-made feature for example, hospitals, schools, shopping mall/shops, public and private offices etc. By using these locations

Ground water Level Scenario Analysis using GIS-Phagi Tehsil (2012-2024) Erratic rainfall, squeezed rainy season, increase in impervious layer etc. have affected the demand and supply of water in the village/city/district/state. Therefore dependency on ground water is increase a lot for drinking, agriculture and other usage in day to day life. Due to this ground water is too much exploited and most of the area/locations in India as well as in Rajasthan became the dark zones. This ground water demand will increase in future as population is growing rapidly. This will affect the ground water quality and which leads to disease and health issues of human beings. Therefore authorities need to regularly monitor the ground water condition as well as plan accordingly to efficiently use of ground water. GIS plays important role in database generation especially in the spatial format both raster and vector. If same monitoring and mapping of ground water performed using GIS will take less

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

Elevation and Slope map using GIS Topographical information/data are very important for the planning and management of resources. These data gives surface elevation information, which plays significant role in road construction/rail alignment, also in natural resource management. As one can understand the importance of the earth's surface height for the planning and execution of any kind of project on the land. The accuracy of ground elevation data is vital for the accurate planning and execution of projects. As well as continuous availability of the ground elevation data is a very tedious process for field surveys. Usually one can get benchmarks and contours data in the name of ground elevation. But the interpretation of ground elevation from contours maps/benchmarks is a quite lengthy process to estimate continuous ground elevation data. Therefore GIS can be used to prepare a continuous layer of ground elevation for any specific area the need. To prepare such layer in GIS, sa

This article is the continuation of an earlier article on downloading and processing of Cartosat DEM. https://www.gisoutlook.com/2020/08/download-cartosat-dem-through-bhuvan.html In this article, processing of DEM is explained such as re-project, clip and fill the Gaps and remove errors present in DEM. These corrections can be performed using GIS functions . Reprojection is needed for correcting geometric errors present in DEM as well as convert the projection system one to another.  GIS tools can be used to Clip DEM and it is very important especially for watershed delineation, for this clipping boundary based on study will be used. Error present in DEM is defined as sudden extreme high  and low  values occur in comparison to surrounding values.   Step 1 –  Re-project the mosaic DEM using QGIS Here we will change the CRS from Geographic to UTM. For this click on Raster then Projections followed by Warp (Reproject) . Warp (Reproject) window will popup. Here define Input layer

Cartosat DEM Download and Mosaicing Process using QGIS This article is prepared to discuss steps to download Cartosat DEM through bhuvan portal . As this DEM downloaded in tiles so one may need more than one DEM tile for study area.  Therefore it is necessary to mosaic these tiles to make a single tile of DEM. In this steps of both processes- download and mosaic are shared to create DEM, which can be further used further for different remote sensing and GIS based applications. Such as  Agricultural Studies Wetland studies Watershed Studies Runoff and Sediment Discharge Studies Urban Sprawl Mapping Transport Studies etc. Step 1 -  Download freely available DEM data using NRSC-Bhuvan website Open weblink:  http://bhuvan.nrsc.gov.in/bhuvan_links.php From this page go to top menu option –  Open Data Archive A new window will open after clicking on Open data Archive. You need to make user id on this page, so click to  Login (on the extreme top right corner) Aft