I have a csv data. the X, and Y columns show bottom left corner of each grid. It is supposed to show as grid square, but it shows points. what is the problem? and is there any way I can make cell grids from these points?
from your question I am assuming that you want to create a raster grid. There are several ways to do this with a spreadsheet, I recommend using QGIS, convert the spreadsheet to a point shapefile: http://www.qgistutorials.com/en/docs/importing_spreadsheets_csv.html To convert the points to raster use the QGIS "convert vector to raster" too mentioned here: How to convert a vector layer to raster? or if you you could consider interpolating the values using the "interpolate" tool