Latest Contributions by JeffreySwain

The reason you would use UNC paths is to prevent access errors when the SOC account reaches out to pull in the source data or the overviews.  If you utilize drive letters, then the drive letters must be constant.  So if you are accessing the M drive when you create the mosaic dataset, you will have to be sure if you use that path on the Server you can still see the data.  UNC paths are preferred because they allow the server and creator to see the data the same way.  For distributed setups (data on one server, server is on another and the creator is using a different machine), the UNC path method is preferred.   As long as the machine is access by it's name and the permission is there for it to access the data, there should not be an error created through the use of UNC paths.  Here is some help documentation that discusses why you would use UNC paths.  Per the help, Another way to make your data available to all SOC machines is to use the operating system tools to share the directory in which the data is stored. Shared directories are commonly referred to with Universal Naming Convention (UNC) paths, which contain the name of the server (for example, \\myServer\data). When you use UNC paths to reference your data, all SOC machines will look to the correct machine for the data. ... View more

It looks as if the syntax change to reference rasters is causing the problem. In testing here, this syntax worked: Lookup(Raster("RasterName"),"Value"). Can you try to change your syntax to: Lookup(Raster("gnn"), "CANCOV"). For the new Raster Calculator to recognize the raster, it needs this syntax. ... View more

Simply right click the layer and then set the base height of the layer to reflect the desired layers.  It is described in the help here.  You can path to any layer, it does not have to be in the document. ... View more

The polygon volume tool will add the values of the volume to the polygons.  So you would be able to see the information added to your polygon tools.  Surface Volume tool usually works on creating a text file with the information.  So to answer your question, depending on the output you are looking for, each tool may be applicable. ... View more

What the help document is discussing is that when you use the 'table' option you will see the entries for the individual rasters and overviews in the Mosaic Dataset.  Since you can see the individual rasters in the new mosaic dataset copy, those individual rasters can be removed, queried or had functions added to them individually.  When you select the option to simply add the mosaic dataset directly as a raster dataset, then you will only see the reference to the original mosaic dataset. To make a second mosaic dataset containing only a selection from the first, there are two options: Using a Selection: 1. Add the first mosaic dataset to ArcMap. 2. Using the selection tool, select the footprints of the items you want to add the second mosaic dataset. Such as using the Select Features By Rectangle tool or opening the attribute table and making a selection in the table. 3. Open the Add Rasters To Mosaic Dataset tool. 4. Select the Table raster type. 5. Drag the mosaic dataset layer to the Source text box on the tool 6. Make any other relevant changes and run the tool. Use a Query: 1. Open the Add Rasters To Mosaic Dataset tool. 2. Select the Table raster type. 3. Expand the Advanced Options. 4. In the File Filter parameter enter an SQL query. For example, if you want to ingest everything that has an ObjectID less that 5 type: OBJECTID < 5 5. Make any other relevant changes and run the tool. ... View more

As long as the raster data added is defined correctly or specified during the add rasters to mosaic dataset, then the mosaic dataset should project it correctly into the new coordinate system. If there is a specific transformation you would like to use, you can specify it under the default tab within the properties of the mosaic dataset. ... View more

Since you have .isdef files and you indicated you are on 9.3.1, then it would be the 'stand alone' Image Server as you have described.  The Image Server extension that utilizes mosaic datasets did not exist at 9.3.1, they are new to 10.  Here is a document that explains many of the differences. ... View more

The cell size and scale of the aerial photography should be available when the imagery is purchased.  I am not sure what you mean by accuracy.   For aerial photography there may be a tag on it, that will indicate all of this information. If the information has been removed, then you will have to hope the metadata will include the focal length of the camera or scale.  Trying to reverse engineer the information without the components may be very challenging.  There are resources on the web that discuss the photogrammetric calculations. Accuracy is usually the result of a classification, which is obtained through an accuracy assessment. ... View more

While you have requested the larger number of classes, there are reasons summarized in the help that indicate why you would have less. The specified Number of classes value is the maximum number of clusters that can result from the clustering process. However, the number of clusters in the output signature file may not be the same as the number specified for the number of classes. This situation occurs in the following cases:     The values of data and the initial cluster means are not evenly distributed. In certain ranges of cell values, the frequency of occurrences for these clusters may be next to none. Consequently, some of the originally predefined cluster means may not have a chance to absorb enough cell members.     Clusters consisting of fewer cells than the specified Minimum class size value will be eliminated at the end of the iterations.     Clusters merge with neighboring clusters when the statistical values are similar after the clusters become stable. Some clusters may be so close to each other and have such similar statistics that keeping them apart would be an unnecessary division of the data. The help documentation cited is here, for the iso cluster.  I would consider the data and then take a look at the settings specified in the processing, perhaps altering the minimum size would prevent the data from being lumped together. ... View more

Lonnie, I am curious to see if ArcGIS 10 will recognize the projection since it is using GDAL for the raster utilities.  Since 10 is using GDAL to display the rasters, the location the projection information is written may be in a different location than 9.3.1 is expecting on the raster.  The workaround at 9.3.1 would be to define the raster with the Define Projection tool and then you should be able to project them. You cannot project a raster with an unknown coordinate system.  Mody, I do not think that ArcMap will recognize a coordinate system not available with the rest of the EPSG coordinate systems, simply because it is using GDAL.  If the EPSG code is correct and in a location on the raster that GDAL indicates, then it should be recognized. ... View more

In ArcScene 10, open the Table of Contents and then create a Group Layer. Then you can drag the CAD layer in from the ArcCatalog Window in ArcScene to the New Group.  Thereby creating a 'grouped' group layer.  Since you indicated you were using CAD data, that is what I used in the example.  Once the Group Layer is created, you should be able to put the CAD data in it. ... View more

After some help with Eric, I have been able figure out how to group the group layers.  The key was to create the Group Layer in the Table of Contents first and then drag in the group layer from the ArcCatalog Window.  This worked at 10 Sp 3.  Sorry for the previous confusion, I wrote ArcGIS, when I meant ArcScene. However, now I have learned the trick to do it. ... View more

Please see the attached help documentation on the polynomial transformations.  This will help explain the higher the order of transformation used, the more points required.   For example the spline transformation requires 10 points. ... View more

It now seems that you can once I have learned the trick.  Please take a look below. ... View more

Grouping layers in ArcScene does work.  I have no problem grouping the layers in ArcGIS 10 SP 3. Be sure that in the table of contents you have selected 'List by Drawing Order' in order to see the group layers.  Also if you want to be sure you are using the Beta ArcScene, please look into joining the 10.1 Beta program.  I sure you when you are working in ArcScene there, you will be using the 'Beta' product.  There is a trick to seeing the group layers in ArcGlobe, but ArcScene has no difficulty. ... View more