Latest Contributions by JamalNUMAN

Jamal, Please send a screenshot of 'B' layer properties so I can see the extent values.  Please do the same for Elevation.  What happens if you add Elevation to a blank map, then add B to it?  Does B overlay Elevation?  If layer B has the same extent values as layer A that you uploaded to this forum, that would explain the issue.  You can't add two rasters together if they don't line up with one another. Eric Thanks a million! My issue is solved. The problem that the created random layer is not lined up with the elevation raster (as you have advised)! I have to set the extent of the �??random raster�?� to be the same as the elevation raster! Now it is working! Appreciated Jamal [ATTACH=CONFIG]15050[/ATTACH] ... View more

try sending your output to a folder rather than a geodatabase also ensure that both files have the same projection Many thanks. Quite frustrating. I set the output to be in a folder, [ATTACH=CONFIG]15046[/ATTACH] I make the two raster on the same coordinate system [ATTACH=CONFIG]15049[/ATTACH] But still the error is there!!!! [ATTACH=CONFIG]15047[/ATTACH] What might be further there? it remains to say that the B raster is derived from the "create random raster", does this matter? [ATTACH=CONFIG]15048[/ATTACH] ... View more

First, you have to tell me what you mean by "not working".  Is there an error?  Is the output wrong?  Have you tried running the Plus tool instead?  Eric Many thanks Eric for the prompt answers. please, have a look on the sort of errors i got on the screenshots below [ATTACH=CONFIG]15001[/ATTACH], [ATTACH=CONFIG]15002[/ATTACH] best Jamal ... View more

Dan, The link is working for me for some reason...That is how I knew his syntax was correct. Eric then could you guess why it is not working Eric? I've attached the two raster in my previous post. thanks jamal ... View more

Jamal when I click on the link in your initial thread, that is error message I got.  Usually you have images in your threads but not this time. Sorry about that. I�??m attaching the screenshot to this post. Many thanks for the help. [ATTACH=CONFIG]14996[/ATTACH] I couldn't attach both rasters as the size of one of them is more than 2MB. however, the link below might work: http://www.mediafire.com/?pk6tp1n5zomd3ho Best Jamal ... View more

invalid link error Thanks Dan. but why it is invalid? ... View more

Yes, it is valid for feature classes since they use ObjectID too.  For additional details on geodatabase limits you can review File geodatabase size and name limits Many Thanks Eric. this is quite useful. best Jamal ... View more

Jamal, Please follow the steps in the knowledge base article to resolve this issue. HowTo:  Compute the histogram with all the unique values, when using the classified renderer Regards, Eric Many thanks for the help. I�??ll try it and let you know [ATTACH=CONFIG]14873[/ATTACH] Best Jamal ... View more

You should be able to do this with the Lookup function similar to one of your other forum posts:What is wrong with this syntax when using the �??raster calculator�?�?. "P_rec" * Lookup("I_rec","I_factor") Many thanks for the help Timothy. The syntax you have provided solved my issue. [ATTACH=CONFIG]14850[/ATTACH] ... View more

Jamal Because the environment shows up does not mean that it is supported. Random numbers in the environment, for example, are not supported when you do CopyFeatures. The tool's help lists which environments are supported. Also, MASK is supported by nearly all the tools in the Spatial Analyst toolbox, all the Geostatistical Anlyst tools that output raster (but only from 10.1 onwards). The tools in the Conversion toolbox and the Raster tools in the DataManagement toolbox, for example,  also do not support mask. I hope this helps you better understand which tools support mask. Steve Many thanks for the elaboration Steve. Very useful. Best Jamal ... View more

Hi Jamal, According to the Help, it doesn't look like it uses the Mask environment variable. Topo to Raster (Spatial Analyst) If you look at the bottom under Environments, you will see that Mask is not listed. Patrick. p.s. To better direct questions dealing with Spatial Analyst tools, it is better to post in the Spatial Analyst forum, not the ArcGIS Desktop - General forum.  Same goes for raster data, it is better to post in the Imagery and Raster forum and not the ArcGIS Desktop - General forum. Many thanks for the answer Patrick. Please, have a look on the screenshot below and let me know what do you think? [ATTACH=CONFIG]14820[/ATTACH] ... View more

The maximum possible ObjectID value is 2,147,483,648. The ObjectID field is maintained by ArcGIS and guarantees a unique ID for each row in a table.  This is the limit of records in a table in theory.  However, since raster attribute tables outside of a geodatabase are maintained/created as .dbf files, they are subject to the 2gb limit on disk just like a shapefile's attribute table would be. Regards, Eric Many thanks for the prompt answer Eric. This is very useful elaboration. Is this valid in case of the attribute tables of feature classes (point, polyline, polygon)? What about their maximum number of records and columns that they can take? ... View more

Hi folks, I wonder if any of you out there know what the theoretical limit on the number of records which can be stored in a raster value attribute table is? I am building a series of stepwise combination rasters which may yield in excess of 2 million unique combinations. I know you can select the option not to build a raster attribute table when the number of unique values is greater than a number you specify (65,536 the default) by going to Tools - Options - Raster Tab - Raster Attribute Table, but I wondered whether there is a limit on the number of records which can be generated, or whether this limit is governed by the size of the attribute table stored on disk (2GB)? Any input appreciated... Dave Hi Dave, did you figure out the maximum number of record the attribute table of the raster can have? thanks Jamal ... View more