Latest Contributions by JamalNUMAN

Great idea! If ESRI manage to meet all the ideas, then i think ArcGIS will be perfect. Slow process in enhancement: too little too late! what do u think? ... View more

Unfortunately, ESRI is very slow to respond in a very basic features and functions! ArcGIS 10 and ArcGIS 9.3 are different in tools arrangement!!!!!!! but not in adding development and addind crucail tools ... View more

The issue with Combine is that it is an integer value operation. Floating point (or text) raster table values wouldn't lend themselves to the desired combinatorial operation.  So --  you would like all the fields in the output table? In command-line ArcInfo GRID there is a command MERGEVAT (it exists in 9.x MOMA, but that's a secret) that does this. It basically did a Join Field between two raster tables, dropping VALUE and COUNT from the second input. That would be a nice little tool. I just may write a Python script tool to do that.... Send it to ESRI as an enhancement request! Thank you for the answer Curtis. Actually, I'm constructing a model using the model builder (attached) in which i needed to have a tool like "combine"! in this case, it is not useful to go back to ArcInfo workstation the "Combine" tool is very crucial but: - it doesn't keep the values of the combined raster as they are - it changes the names of the fields and replace them by the name of rasters!!!!!!!!!!!!!!!!!!!! very confusing!!!!!!! I'm not sure how can i proceed with my model!!!!! i need to connect all the part of the model but i couldn't due to the unavailability of some important tools in ArcGIS !!!!!! any idea how can i proceed? regards Jamal ... View more

I think I found the loophole. The IPRIME Field in your raster is a "Double" value. The tools seem to only like Floating Point or Integer values. If you can live with your values *10 you can just make an integer field and use the field calculator. Then use the lookup tool (It works, I tried it). If you create a floating point field or keep the double and use the lookup there is an Arc10 glitch that makes 0.4 0.40000012 (or adds some random decimal to the end). Where is this data coming from? Do you have an original file/files you used to create this raster? With that I could provide some more help. So to review the loophole is: Create a new field of type integer Calculate value to be IPRIME * 10 Use the lookup tool to create a new raster based on your new integer field There ya go.... a nice roundabout method Thank you Kyle for the help. finally it did work! now i got a dissolved raster with the values of 0.2, 0.4, 0.6, 0.8 and 1 i have another raster of the values: a, b, c and d what i need now in to combine them then to add a field in which I'm going to apply the If statement below: ---------------------------------------------------------------------------- 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 ----------------------------------------------------------------------------------------- unfortunately, the combine tool switches the original values to another ones!!!!! so that i can't apply the above If statement!!!! very confusing and exhausting!!!!!!!! how can i combine these two rasters but to keep the original values to proceed in the analysis??? please, see the attached images. The second image shows the flow chart that i apply in order to derive what we call I-map. in order to derive the I-map, 4 main rasters are involved: Land use: forest, field/meadow/pasture Slope: <3.5%, 3.5%-27%, >27% Hydraulic conductivity: Type A, Type B, Type C, Type D, Type E, Type F Surface catchment: a, b, c, d then these rasters are combined according the logic illustrated in the flow chart (2nd image in the attachment) in each single step of the analysis, i got stuck!!!! ArcGIS doesn't give a smooth path to accomplish the analysis straight forward!!!! So how can i combine the two rasters but to keep the original values???? regards Jamal ... View more

Try some of the other suggestions then, there have been several others but you appear to be fixed on one, is there a reason? at all. this is the only suggestion that i got. do you have any? ... View more

Raster to Polygon only takes integer (or string) - period. This is by design since 9.0 The reason is that too many individual polygons will be created in most cases. In the case where one really wants float output, then can multiply the raster by, say 1000, and cast to integer, convert and then divide by 1000. This workflow has been repeated many, many times in this Forum. Steve Thank you for the answer. this problem is originated from trying to dissolve the raster (attached image) according the Iprime field. i was trying to have a dissolved raster with 5 values: 0.2, 0.4, 0.6, 0.8 and 1. but i couldn't find any tool to accomplish this task. i got a suggestion to convert the raster to polygons then the ploygons to raster to achieve the dissolve!!!!! nevertheless, the problem is again there. i couldn't obtain a dissolved raster with the values   0.2, 0.4, 0.6, 0.8 and 1 basically, how can i dissolve the raster according the Iprime field? ... View more

Jamal, I would contact Support and open an incident with them.  It looks like you are having issues with that dataset in multiple tools.  Without the data in hand, it's going to be difficult to guess what the problem is. the data is attached thank you Jamal ... View more

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