creating raster from a csv file

mintiayele

Dear all,

I am new to arcgis (have the education Edition of arcgis) and am trying to create a raster layer from a csv file. The csv file has latitude and longitude and what I did so far is to read my csv file into arcmap and create a shape file. Then I used the spatial analysist tools, create normal raster and I think created a raster. but the raster looks like a collection of tiles with points (from my shapefile ) on top of it. Is that how it is supposed to look like? And when I read the raster in r , it is not giving me the results I expect.

Now what I cannot tell is whether what I did to create the raster is indeed right.

Suggestions appreciated
Thanks
minti

PetronilaMandeno

Dear all,

I have a followup question to my earlier request. How do I activate spatial analyst? I have added the extension but I do not see the tools icon that would take me to spatial analyst

regards
minti

Go to Customize (in the menu bar) then Extensions. Click the little box next to the extension you want to use then close the dialog box. You should be able to turn on the Spatial Analyst tool bar after that (right click on the menu bar, then scroll down the list of tool bars.

Also, the idea is to calculate the rainfall at your farms, right? That's the question you want to answer?

Once you interpolate the rainfall values over an extent that covers your farms, then you can extract the values from the interpolated surface to your farm points. (Look up Extract Point Values)