Showing the values in grids

[MuhammadhKhalid]

Hi everyone,

I have my Rainfall data on points as shown in the following diagram. 

I want them to be show in 3km X 3km grids as shown the following diagram.

I also want the values in these grids as shown in the above, (ie - in regular interval like 0-10, 10-20 ) and the area percentage of these values.

Can you please say me what tool I have to use and how to use them.

Any help is highly appreciable.

[DanPatterson_Retired]

if you have an advanced license, you can do a direct conversion specifying the cell size the same as your interpoint spacing using Point to Raster—Help | ArcGIS for Desktop 

if not, you can use Create Fishnet—Help | ArcGIS for Desktop to create square polygons centered about your points, then spatially join the points to the polygon to bring your attributes over.

The classes and symbology, just use standard tools as covered in the help topics

The clipping is the same, but with the raster, you may want to mask out the exterior area to blend in with the background if you choose.

[MuhammadhKhalid]

Hi Patterson

Thank you for your quick reply. I was able to use the Point to Raster tool. But the out put comes as either 3.40282e+038 or -3.40282e+038. Even though the  output layer is shown under the table of content I'm unable to see anything in the work-space. I think there are some problem with the units. But I dont know how to correct it. Can you please help me. 

Also if I want the output in 3km X 3km grids whats the value I should give in output cell size field ? I mean do they have to be given in meters as 3000?

[MuhammadhKhalid]

Following is the data source of my input file to Point to raster tool

[DanPatterson_Retired]

go the symbology tab for the raster, look at its histogram... what you are seeing is a stretched range... change the symbology so it isn't stretched and do a manual classification to make it look correct.

[MuhammadhKhalid]

Following is my symbology and its not changing from streched to others.

 

If I try to change it to classified it says following message and if I give ok to it, its not changing and again in stretched.

[MuhammadhKhalid]

Hi 

Without giving any processing extent I now gave the cell size as 0.05 and I'm getting nice grids and can change symbology. What is the problem for this behavior and what is my cell size for the value 0.05?

[DanPatterson_Retired]

because your cell size is 0.05 degrees.

when check the symbology, go to the Histogram option to see the real data distribution, never rely on the legend or what the symbology shows to figure out what data values you actually have.

stretched is pretty well useless, unless you know what you are stretching

[MuhammadhKhalid]

Thank you Patterson 

But i don't want the grids in degrees. I want it in 5km x 5km grids. How can I do it?

[DanPatterson_Retired]

You seem to have missed my previous response...

you want a projected raster, you could do the projection first using the Project  tool
Alternately you can use the Project Raste tool on the raster.
My preference would be the first option

The links are in the actual post.  Decide what format you want first (ie projection cell size etc) then worry about symbology... it is the least of your worries... I prefer first name as well