topic Re: SUMMATION USING ARC MAP(RASTER CALCULATOR) in ArcGIS Spatial Analyst Questions

SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Tue, 17 Mar 2015 19:10:54 GMT

WHILE CALCULATION AN EXPRESSION HOW TO PERFORM SUMMATION WHICH IS NOT FOUND IN RASTER CALCULATOR.

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Tue, 17 Mar 2015 20:00:45 GMT

Move to the Spatial Analyst Place in order to get an answer.

Summation is accomplished using the Plus tool in ArcToolbox, spatial Analyst Tools

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DarrenWiens2 — Tue, 17 Mar 2015 20:11:09 GMT

Summation (I assume you mean adding pixel locations between rasters) in the Raster Calculator is achieved through the plus sign.

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 08:23:27 GMT

Sir i mean calculation from (i=0 to m a/b)

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 08:25:00 GMT

I mean summation of values from i=0 to i=24 (not simple addition).summation(sigma) is not found in rater calculator.

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Wed, 18 Mar 2015 08:35:58 GMT

Their is no sigma...you either select and add the grids one at a time using the raster calculator or the Plus tool within a loop in a script that you will have to write.

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:01:56 GMT

it is an equation to find sediment delivery ratio ,where equation is exponential summation of length of i th cell divided by slope of the i th cell

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Wed, 18 Mar 2015 09:12:01 GMT

Okay...You seem to be having an issue with my translation....so here are my comments and interpretations of what you need to do...

there is no automagic summation for everything button... if the tool doesn't exist, then you have to emulate it
you need to do the summation of part of an equation
hence, break your workflow down into bits, one of which is summation of whatever you want the cumulative sum down
throw the result of 3 into the equation
any equation can be automated and scripted
show your equation and a list of your inputs

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:27:54 GMT

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:29:16 GMT

but after summation i will get only one value right ? i need in raster form which contain details of each cell

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Wed, 18 Mar 2015 09:29:43 GMT

Great!!!

Now let's see what you have so far in the way of a script

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:31:16 GMT

suppose i calculate ( length / slope) value of all cells then how i get cell by cell value as in raster form

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Wed, 18 Mar 2015 09:36:05 GMT

I would search the web first using sediment yield arcmap as the search key. Anything useful has probably already been done

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:51:12 GMT

what about to solve this equation sir? is it possible?

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Wed, 18 Mar 2015 09:53:07 GMT

sir any trail version vailable for this tool EnvSys_SoilErosion?

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Wed, 18 Mar 2015 10:27:26 GMT

contact the author on their site if there is any information

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

XanderBakker — Wed, 18 Mar 2015 12:26:21 GMT

You can just download the toolbox: http://www.envsys.co.kr/~sateec/toolbox/EnvSys_SoilErosion_Toolbox_ArcGIS_ModelBuilder.zip as stated on the website (Soil Erosion / Sediment Yield ArcGIS Toolbox Kangwon National Univ. ) and if you have Spatial Analyst, you will be able to use the toolbox. No need to have a trail version.

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Thu, 19 Mar 2015 10:07:32 GMT

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

deepa_davis — Thu, 19 Mar 2015 10:08:02 GMT

Re: SUMMATION USING ARC MAP(RASTER CALCULATOR)

DanPatterson_Retired — Thu, 19 Mar 2015 10:27:51 GMT

well the error on the left pretty well sums it up...what is required? what does it say in the help for the tool? Is there anything on the website to describe what is needed? fill us in so we don't have to download and read it ourselves