GeoSpatial Knowledge Hive

Object Based Classification Using eCognition tutorials by GIS HIVE . ImageSource:PixaBay   Lab 01 Performing Image Classification On High Resolution Data on Erdas Imagine Lab 02 Introduction to eCognition Basics Lab 03 Image Segmentation using eCognition Lab 04 Object Based Classification Using Standard NN eCognition Lab 05 Rule Based Classification using  eCognition GIS HIVE intends to promote Geo Spatial Sciences awareness, for that purpose GIS HIVE has launched Youtube Channel . Here you can explore various Geospatial tutorials.

Northern Areas of Pakistan are blessed with beauty, we often hear people quoting these beautiful areas as “Switzerland of Pakistan”, “Heaven on Earth”, but these words proved there reality when for the first time I visited Northern Pakistan. It is worth mentioning that Pakistan is dependent on frozen hydrological resources. Many rivers such as River Swat, Chitral, Gilgit, Hunza, Shigar, Shyok, Indus, Shingo, Astor, and Jhelum are fed by runoff generated by melting of SC of Northern areas. Image by Aqsa kamran from Pixabay Image by Abdullah Shakoor2 from Pixabay This runoff supports agriculture . Agriculture of Pakistan is largely dependent on the snow melting phenomenon. Anomalies witnessed in glaciers and their melting patterns will have massive impact on hydrological resources because the country’s 70% of fresh water depends upon these frozen hydrological resources in the high mountains of Himalaya and Hindu Ku...

With urbanization and urban sprawl, land-use and land-cover change studies became an area of keen interest for researchers. Cause of rapid urbanization is peoples’ responses to economic opportunities. Image by  Alexas_Fotos  from  Pixabay   “Image Classification is the process of sorting pixels into a finite number of individual classes, or categories, of data based on their data file values”. If a pixel satisfies a certain set of criteria, then the pixel is assigned to the class that corresponds to that criteria. Remote Sensing generally classify data by  Supervised &  Unsupervised methodology Supervised classification is more closely controlled by analyst than unsupervised classification. In this process, analyst select pixels that represent patterns that can be identified with help from other sources. Knowledge of the data, the classes desired, and the algorithm to be used is required before you begin selecting training samples. By i...

GIS & Remote Sensing is widely used for studying Urban Dynamics Change. Many questions like what is %age increase in buildings in a city, what is direction of increase, etc.. etc.. This study explores urban change in Quetta District of province Balochistan,Pakistan.  Link for Project Image by Эдуард Ризванов from Pixabay LULC Image Of Quetta  District

How can farmer benefit from Remote Sensing Satellite Images can be used to study vegetation. Farmer can monitor health using satellite images, Using Satellite Images to calculate NDVI   Normalized Difference Vegetation Index ,  NVI   Normalized Vegetation Indice.  Example of Satellite Sensor : SMOS (Soil Moisture Ocean Salinity), can forecast crop production, depict drought as well. How it works : Near Infrared & Red Band can be used to study vegetation since in NIR band vegetation gives maximum reflection and in Red it gives minimum  Crop Monitoring can help farmers in monitoring their fields by giving them real-time information about possible risks that could threaten their crops image source:  Tata Chemicals

DigitalGlobe Free Product Samples What is the Resolution of sample imagery: You can almost see license plates with the 30 cm spatial resolution data from the newly launched Worldview-3 satellite. Download 30 cm product: Image source: http://www.digitalglobe.com/

Assigning  image  to behave as real earth position with true coordinates(lat, long) defines all three terms but there are differences. Geo-Referencing is general term that assigns a topo sheet true coordinates. Image Registration  is assigning an image coordinates on basis of another image. It is usually an image to image Georeferencing. Image Rectification  is assigning an image coordinates on basis of another vector data or shapefile or map. Share your thoughts by commenting below. Image by Free-Photos from Pixabay

  Gives an idea of population concentration based on radiance How many layers it has: Two base layers Road Bing Maps (Hybrid) Where i can use:  Research  Urban Planning  Demographic Studies  Spatial Planning  Governance  Transportation  Geo- Business  Image by  Эдуард Ризванов  from  Pixabay   Source:http://www.lightpollutionmap.info Notes: The light pollution 2010 overlay was made from "Version 4 DMSP-OLS Stable Lights Coverage". The light pollution 2014, 2015, 2016 overlays were made from "VIIRS DNB Cloud Free Composites". Data from 2010 and 2014/2015/2016 is not comparable (different satellite systems)!!! Text Source: http://www.lightpollutionmap.info/

Are you thinking to analyze how much of city is covered with vegetation or forest, there are many houses having big lawns with boundary wall how to get data, satellite images have solved this problem. You can now very easily get vegetation in your city or country using satellite images. Image by  Free-Photos  from  Pixabay   How to do it -          Download a satellite image            Get GIS Software  -          Perform analysis -          Generate a Map Your first step is to download any satellite imagery of your area from any free satellite data source such as USGS Earth Explorer   or any other.  Multi-spectral  Imagery that captures scene in many bands which are usually available free of cost. Downloading Raster Imagery using Earth Explorer Follow URL https://earthe...