Latest Contributions by JamalNUMAN

Don't know why I asked if it was short or long, because you obviously have decimals in there.  As for why it doesn't work, when I asked early looked at the wrong Help.  I accidentally looked up the help for polygon to raster, which will use float or integer. Raster to Polygon only uses integer or string. raster_field (Optional) The field used to assign values from the cells in the input raster to the polygons in the output dataset. It can be an integer or a string field. http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001200000008000000.htm It is SP2. I'm not sure also why when we reclassify according the Iprime then the result is irrelevant!!! (attached) ... View more

Use the Lookup tool.  It will take a raster, and use a field, and make a new raster.  To output a ESRI Grid, just don't put an extension on the end of the name (i.e. instead of test.tif just call it test).  If you are just looking to go from Tiff to Grid, just use Copy Raster. What i'm looking for is to have a dissolved raster of values: 0.2, 0.4, 0.6, 0.8 and 1. please, see the attached images that show that the "lookup" too is not helpful to achieve what I'm looking for what else i may try? ... View more

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