Latest Contributions by EricRice

Very frustrating that this bug has still not been addressed as of ArcGIS 10 SP3! Note that the problem occurs when you have pyramids and you map one of the fields from the Raster Attribute Table (not when you map the value itself)... It does seem that you are encountering NIM040765 as Patrick suggested, but we can't be sure until you tell us what version you built the pyramids in.  If you built the pyramids in 10.0, then you are encountering a new bug.  NIM040765 is specific to pyramids built in 9.3.x.  That bug is not open at this time.  The status is Rejected - non repro -when you build the new pyramids (OVR files) in 10.0. Regards, Eric ... View more

Noel, Run the Cell Statistics tool with Maximum or Minimum set in the Overlay statistic parameter. Regards, Eric ... View more

Hi Carma, Is the polygon selected part of a layer in the map?  i.e. shapefile or geodatabase feature class.  If yes, then that is why it's not available.  Those are not graphics.  Those are featues. You would need to turn on the Draw toolbar and create a graphic to clip to.  If you want to clip the raster to a polygon feature, you can just as easily run the Clip tool.  If a feature within the feature class is selected and "Use input features for clipping geometry" is checked, then the output clips out the areas that are selected. Regards, Eric ... View more

Tony, Just curious how many data nodes are in the TIN that you wrote to the default fgdb and are now trying to edit with Edit TIN?  Also, are you saying that you can browse to a fgdb for the output location, or did you copy/paste the fgdb path into the output parameter? Is there a reason you want a TIN over a Terrain? TIN's are not very well suited to manage large Lidar collections.  The maximum allowable size of a TIN varies relative to free, contiguous memory resources. Ten to 15 million nodes represents the largest size achievable under normal operating conditions with Win32. Regardless, it's strongly recommended to cap the size at a few million for the sake of usability and performance. Anything larger than this is best represented using a terrain dataset. Regards, Eric ... View more

Hi Marie, In terms of showing/displaying the data, you need the classified renderer to do this.  You can set class breaks at 1500 and 1600 so that range will have a specific color.  Is your data integer or float?  If you make a new raster with those values do you want the new raster to maintain the orginal values, or would you be fine with a binary output where 1 means the pixel is within those values and 0 means its not?  Depending on what you say, I'll either direct you to the Raster Calculator or the Extract by Attribute tool.  There are multiple ways to do this in ArcGIS.  I just need to know what you want for your output.  If you want to discuss your goals offline, let me know and I'll shoot you an email. Best Regards, Eric ... View more

Greetings, Please use the Contour geoprocessing tool.  I'm guessing your using the interactive contour tool from the toolbar which only creates graphics.  Technically you can convert graphics to features, but it's much easier to just run the tool. Regards, Eric ... View more

Hi Jamal, I was hoping to keep this specific to either 3D or Spatial Analyst, but I'll run with what you've provided.  The Export Data dialog has several equivalent geoprocessing tools.  Because of this, it can't have the exact same name as a single tool in ArcToolbox.  The raster > Data > Export Data dialog provides the following capabilities. Converting your input raster to another format Projecting your raster to another coordinate system Changing the cell size of your raster Clipping a raster dataset Sub setting a raster dataset with more than 3 bands, so that you just get the 3 bands being displayed. e.g. Converting 7 band landsat to 3 band landsat Permanently applying a stretch to an image (No single equivalent GP tool because it needs the renderer information to do this.) In ArcToolbox you would use these tools to mimic the Export Raster Data dialog. Copy Raster Project Raster Resample Clip Composite Bands Make Raster Layer The export dialog is more of an interactive user experience and while GP can be run from the Desktop, it is often run via scripting.  There is no way we would make a single GP tool with all of the possible parameters that could be called from the export dialog.  Regards, Eric ... View more

Greetings, The export dialog doesn't honor any geoprocessing environments.  Everything you can do with the export dialog is in ArcToolbox.  If you need to snap the output you must use geoprocessing tools and set the environment settings correctly. Regards, Eric ... View more

Hi Autumn, You're welcome!  I personally set the snap raster environment on pretty much everything I do.  It's there for you to control, and ensure pixel alignment.  For even more control, convert your zones to raster in advance as discussed in the documentation for the zonal tools.  Eric ... View more

Greetings, Please review this other thread where I explain how a cell is determined to be within the mask or not.  The same applies to the Zonal tools.  Think of the zones as masks... Your zones are also converted to rasters in the background; most spatial analyst tools will let you input features, but we internally convert to raster. http://forums.arcgis.com/threads/40549-Criteria-for-raster-cell-extraction-by-mask?p=137795#post137795 Regards, Eric ... View more

Hi Justin, I forgot the .shx part of the shapefile.  I reposted a fixed zip back in that old post.  It should work now.  Sorry. When you created the points did you specify the Z value so the resulting points were PointZ?  The lines will then be PolylineZ.  If you didn't start with 3d points, then the lines would just be 2d also, and will not intersect the surface (multipatch). When you display the lines in ArcScene are they 3d? Do they visually intersect the surface? Can you send screenshots? Do you have a maintenance contract with us so you can call Esri Support?  All of the analyst are familiar with doing this type of intersection.  Regards, Eric ... View more

Another way to evaluate the spacing would be to convert your contours to points via the Feature Vertices to Points tool.  Each point would have the z value from the contour.  Then take the points, and convert them to raster using the Point to Raster tool, with Cell Assignment Type set to Count.  The resulting raster values will show you how many points were in each cell.  Inspect the result to look for variance in density and data voids.  If the density is to high, reduce the cellsize.  If data voids are too big, increase the cellsize.  It's all about finding balance in this iterative process, but should help determine a close to optimal cellsize for interpolating. Eric ... View more

Christi, Once you get a DEM what will you be using it for?  What are the spatial resolutions/accuracies required for your project?  When you say you have 2ft contours, remember that it's only in the Z that you have 2ft resolution.  Steve's point in the Hawaii data (which I haven't looked at) is that in the X,Y some of those contours are 50ft apart. To further his point - If you have don't have 2ft resolution in x,y within your real data, then a raster with 2ft cellsizes is probably overkill.  You can get 10m DEM's for free for pretty much all of America from USGS if that resolution would fit your requirements.  If you have access to the professional photogrammetrist who derived the data, you should ask them what they think a good resolution is for the data. Also, many digital photogrammetry applications output surfaces as rasters or TIN's directly, then contours are derived from those. They may already have the raster your looking for. Another option is to create a TIN/Terrain from your contours, then convert that to raster at varying cellsizes to find an appropriate one for your needs. Regards, Eric ... View more

Though this is a very old post, I was wondering if there was a way to do this in ArcEditor 9.3.2. I've got the visualization working well enough but I'd really like to be able to get the intersection points for my 3D lines and my surface. Thank you. See the LOS workflow above.  Intersecting 3d lines with multipatches is new at 10.0, and intersecting 3d lines directly to surfaces is coming in 10.1.  Regards, Eric ... View more

Justin Forget the Construct Site Lines tool.  All we need to do is run Points to Line (using your Sort ID field as the Sort Field parameter), and Splite Line at Vertices.  I do want to point out your original points are in geographic coordinates, and the z value (altitude?) is definitely not in units of DD.  So what I did was make an assumption that altitude was meters, and projected the points to UTM meters so that x,y,z were all the same units.  Then I created the lines and split them so each would be a unique record. The attached zip file has the lines for you to check. Eric ... View more