Latest Contributions by EricRice

Hi Guillem, In ArcGIS 9.3.1 you can do a zonal histogram from the spatial analyst toolbar.  See About zonal histograms in the 9.3.1 documentation for steps and screenshots to help you along. To answer the question of, "How many yellow pixels I have in each yellow cluster", you can run Region Group.  Region Group records the identity of the connected region to which that cell belongs. A unique number is assigned to each region along with a count of the cells that were connected. Regards, Eric ... View more

Guillem, Check out the Zonal Histogram tool. This is probably a good starting point. An overview of the zonal tools Best Regards, Eric ... View more

Greetings, In Spatial Analyst, Input Raster + 0 is basically the same as copying the raster. Eric ... View more

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

Jamal, Your expression is using �??wt�?� but your layer name is �??wt1�?�. Eric ... View more

Jamal, I posted the answer in the other thread you were in today, but posting here too just in case you miss it. Con(IsNull("raster"),FocalStatistics("raster",NbrRectangle(3,3),"MEAN"),"raster") You may need to increase the neighborhood size for your case.  You may also find the Overview of the Generalization toolset useful for this case as well. Regards, Eric ... View more

Hi Jamal, I reviewed your screenshot and you are specifying FOCALMEAN which is not a command in map algebra at 10.0. Please review my earlier post wherein I provide the syntax to use at 10.0.  i.e. FocalStatistics Regards, Eric ... View more

Greetings, In ArcGIS 10, you can assign a constant value to a raster by selecting the option, "No elevation values from a surface" then in the Layer offset section you can "Add a constant elevation offset in scene units".  The layer offset is where you specify the constant value you want. Hope this helps! Regards, Eric ... View more

The Lookup tool only supports integer output. Does anyone have a workaround for floating point data in another field? Greg, The Lookup tool is not limited to integer output.  I just created a field of type Float, and populated it with floating point values.  When I use this field in the Lookup tool, I get a floating point raster as output.  Is it possible you have floating point values stored in a text field?  The documentation for the Lookup tool does state, "The output will always be of integer type".  This is wrong, and I've notified the appropriate team so they can change that sentence in the doc. Regards, Eric ... View more

Tiffany, Check out the Zonal Histogram tool. Regards, Eric ... View more

Shane, It's not possible to project a Terrain dataset.  There are two approaches: 1.  Convert to raster and project it all in one shot.  The Terrain to Raster tool honors Output Coordinate System setting in the Environment Settings. 2.  Project the source features in the geodatabase and recreate the Terrain. As for the out of memory error, please go to the Environment Settings > Terrain Dataset and turn the option "on" to mimimize memory use during analysis on terrains.  This should prevent it from giving you that error. Regards, Eric ... View more

Greetings, Esri has this enhancement request documented under NIM063903: Provide support for MrSID Generation 4 (MG4).   The implementation of the request is being targeted for the 10.1 release.  Regards, Eric ... View more

Guillem, Have you checked out the Majority Filter and Boundary Clean tools?  This section in the documentation is probably a good starting point for you. Smoothing zone edges with Boundary Clean and Majority Filter Note, these tools are licensed with Spatial Analyst. Regards, Eric ... View more