Latest Contributions by JamalNUMAN

What is the Type for this field?  Is it String, Short, Long, Float, Double? it is double. ... View more

convert the tif to an ESRI grid using the IPRIM field but using which tool can i convert the TIF to ESRI GIRID? ... View more

It depends on what you want to do with the raster. You could just create a new raster where the field you want is the "Value" field and then just use that raster as a "zone". Or you could just change the symbology so that it represents the field you want. Another method would be to covert your raster to a polygon based on the field you want, then use the dissolve and convert back to a raster. As far as I know there is no "raster dissolve" tool. You could also use some sort of conditional statement as well if you want to dive into that. Thank you for the answer Kyle. please, have a look on the attached image that shows that i cant convert the raster to polygons according the Iprime field that contain real numbers what I'm looking for is to have a raster that has only the values: 0.2, 0.4, 0.6, 0.8 and 1. (out of the given raster) then this raster (Iprime) is intended to be combined with another raster (CtachType) that has the values: a, b, c and d. then a field is added to the combined raster and its values are calculated according to the following if statement: ------------------------------------------------------------------------------------------ if [CtachType] = "a" then Select Case [Iprime] Case .2 OP= 0 Case .4 OP= 0 Case .6 OP= 0 Case .8 OP= 0 Case 1 OP= 0 end select else if [CtachType] = "b" then Select Case [Iprime] Case .2 OP= .2 Case .4 OP= .4 Case .6 OP= .6 Case .8 OP= .8 Case 1 OP= 1 end select else if [CtachType] = "c" then Select Case [Iprime] Case .2 OP= .4 Case .4 OP= .6 Case .6 OP= .8 Case .8 OP= 1 Case 1 OP= 1 end select else if [CtachType] = "d" then Select Case [Iprime] Case .2 OP= .6 Case .4 OP= .8 Case .6 OP= 1 Case .8 OP= 1 Case 1 OP= 1 end select end if end if end if end if ----------------------------------------------------------------------------- this is why i need the resulted raster to have only the values  0.2, 0.4, 0.6, 0.8 and 1. but how can i do that? regards Jamal ... View more

use "combine" to produce the unique conditions if you don't want to do the nested "con" statements, then query for your cases.  It is all documented in the help files Thank you Patterson. i used the combine tool then i added a new field at which i applied the if statement. it did work ---------------------------------------------------------------------------------------------------- if [LANDUSE] = 1 then           if [HYDRCOND] = 1 then              Select Case [SLOPE]     Case 1        oo = .6     Case 2          oo =.4     Case 3         oo =.2     Case Else        oo =0 End Select            else           if [HYDRCOND] = 2 then              Select Case [SLOPE]     Case 1        oo = .8     Case 2          oo =.4     Case 3         oo =.2     Case Else        oo =0 End Select           end if end if else if  [LANDUSE]  = 2 then           if [HYDRCOND] = 1 then              Select Case [SLOPE]     Case 1        oo = .8     Case 2          oo =.6     Case 3         oo =.4     Case Else        oo =0 End Select            else           if [HYDRCOND] = 2 then              Select Case [SLOPE]     Case 1        oo = 1     Case 2          oo =.6     Case 3         oo =.4     Case Else        oo =0 End Select end if end if end if end if --------------------------------------------------------------------------------------------------------- Regards Jamal ... View more

Con http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z00000005000000.htm Thank you for the answer Patterson. i couldn't manage how to use the "Con" tool to fit my case! (attached). the help doesn't show what I'm looking for...! Could you please elaborate more how can i use this tool? how can i use it to apply the first condition? --------------------------------------------------------------------------------------------- if [Type] = "Forest" and [FlowType] = "TYPE D" and [Slope] = 1 then op = .8 --------------------------------------------------------------------------------------------- regards Jamal ... View more

Greate eleboration Steve. thank you Jamal Use the following 3 GP tools Create Fishnet - extent = raster extent - cell size width/height = raster cell size - number of rows/columns = number of rows/columns of raster - Geometry type = Polyline Raster To Point Feature To Polygon - Input features = Fishnet output - Label Features = Raster To Point output ... View more

thank you Eric. it did work. appreciated jamal Jamal, We intentionally dissolve the pixel boundaries (for continuous pixel values) so the output is not so large.  This is also why we do not allow you to convert float rasters to polygons.  You could potentially end up with billions of polygon records depending on the size of your raster.  I would suggest using the Create Fishnet tool that is part of core ArcGIS Desktop.  It might take a long time to process if you are going to be creating a lot of cells. If you need to have the raster value associated with the fishnet polygons, convert your raster to points and do a spatial join. Regards, Eric ... View more

thank you ERIC. it did work. now, how to say that it is solved? appreciated Jamal Jamal, Your expression is using �??wt�?� but your layer name is �??wt1�?�. Eric ... View more