Daily Archives: June 19, 2008


Dear Readers It is regarding the earlier post Msterious cracks…….. One Earth_Science_India group member Dr. Raed Ahmad has suggested tht these cracks are sinkholes. I am Publishing what he posted. Sinkholes are common where the rock below the land surface … Continue reading

Posted in interior of the Earth | Leave a comment

GIS:Spatial Data

SPATIAL DATA TYPES In a GIS, the Locational information is provided in maps by using Points, Lines and Polygons. These geometric descriptions are the basic data elements of a map. 1. Points: They are represented as a single ‘Dot ‘on … Continue reading

Posted in GIS, Remote Sensing 101, Statistical Techniques | Leave a comment