Latest Contributions by EricRice

Greetings, If it doesn't matter how you arrive at the result - here is a workflow. 1. Convert points to raster. 2. Interpolate a surface from  the points. Snap the result to raster from step 1. (same extent and cell size also) 3. Write a conditional statement that says where raster 1 is null, replace it with raster 2. Where it is not null, keep raster 1. Regards, Eric ... View more

The old Merge command has nothing to do with arithmetic.  It is (was) a mosaic operation. -Eric ... View more

Try removing the spaces and special characters in your input. -Eric ... View more

Greetings, Have a look at the Expand tool.  You can specify the river value as a zone to increase by x number of pixels, then convert (Set Null) the expanded river to nodata. Regards, Eric ... View more

Did you import the spatial analyst module? # Import system modules import arcpy from arcpy.sa import * Did you check out the spatial analyst license? # Check out the ArcGIS Spatial Analyst extension license arcpy.CheckOutExtension("Spatial") Regards, Eric ... View more

Hi Steve, Sorry to hear that the toolbox tool is not working. I'd suggest contacting Esri Support.  In the meantime you can create the images you need with the IAW window, get your temporary rasters, right click and export them to save them to disk. Regards, Eric ... View more

James, You can add the bands together, then take the average to get a single band grayscale image.  Basicaly its R+G+B/3.  You can do this quite easily with the raster calculator.  If you want to get fancy, you can use the grayscale function so the conversion to grayscale happens on the fly. Regards, Eric ... View more

Have a look at the Zonal Statistics as Table tool in Spatial Analyst.  Your roofs shapefile would be the zones.  The tool inputs single band rasters, so you'll have to run it on each band seperately, then collate the results into a single table via joins. Eric ... View more

Stephen, If you are referring to the composite bands button on the Image Analysis Window, then the answer is no.  All the buttons in that window create what is called 'function rasters' which are temporary until you save them.  You could change your windows system TEMP directory to another folder if you really want it to go somewhere else, but that is at the OS level.  You should notice in the properties of the layer that the status is temporary.  No pixels have even been written to disc.  This is why the result of the composite bands button is created so fast.  Everything happens on the fly. A full explanation can be found here: Rasters with Functions If you don't want to work with function rasters (temporary rasters), then you can run the Composite Bands tool from ArcToolbox where you are in full control of the environment settings. e.g. workspaces Regards, Eric ... View more

Hi Jamal, Please provide specific examples and I can provide comments/history. Thanks, Eric ... View more

Iterators are only available in ArcGIS 10.0.  Pre 10.0, you can right click on the tool and select Batch.  The other option is to write a loop in Python. A quick tour of batch processing Regards, Eric ... View more

Greetings, Try running Build Raster Attribute Table after the Clip operation.  Regards, Eric ... View more

I'm wondering why ESRI couldn't includes all the commands in the ArcToolbox. It's quite crucial for the user to access all the commands from one place! All of the commands have always been in ArcToolbox.  The toolbar was what was limited in functionality. It only contained a subset of tools that 3D Analyst offered. second, some times, the same command has two different names! one name in the Arctoolbox and other name in the toolbar minue! This is one of the very reasons the toolbars from Spatial Analyst and 3D Analyst had their tools removed.  Different names, different parameters, different UI's, different environments/options, all led to confusion for many users.  The full power of these extensions (analytically anyway) has always been and remains in ArcToolbox. Regards, Eric ... View more

Andrew, Put the Clip tool in a model, and use the Iterate Rasters tool to loop through the input scenes and have them all clipped to the same shapefile geometry.  The Iterate Rasters tool has two outputs: Output Raster and Name, which could be used as in-line variable %Name% in other tools (mainly Clip for your case).  This is how you get the sequentially named outputs you desire. Regards, Eric ... View more

Hi Philip, Python has no solution in 10.0.  If you have ArcGIS 10.1 beta, you can do this by calling a new GP tool called, Edit Raster Function.  In 10.1 beta there is also the concept of function templates, which you can create ahead of time and then import the whole function chain instead of looping through the tool to add multiple functions. Regards, Eric ... View more