Latest Contributions by TimothyHales

Looks like there may be a few bugs related to this issue.  I would suggest contacting Esri Support to have this problem looked into further. ... View more

Another thing you might try is to create an ArcGlobe document and drape the imagery over the elevation data.  Then save and published the ArcGlobe document as a globe service. ... View more

Here is a link that describes this process.  They exported the TIN to VRML and then used Python to convert the VRML to STL. http://gis.ess.washington.edu/data/vrml/index.html ... View more

Glad to hear that worked.  Just out of curiosity, what LizardTech product did you use? ... View more

You cannot drape imagery onto a DEM within a mosaic dataset.  The draping process is a 3D function which does not apply to the mosaic dataset functions.  The Shaded Relief function does not make the raster 3D but applies symbology to give the visual effect of it being 3D. What are the raster or mosaic dataset functions? You can take the elevation mosaic dataset into ArcGlobe and then effectively drape the imagery. ... View more

There are a few things that you could try.  You could use LizardTech, but that would require obtaining additional software.  Converting the MrSID images to tiff before mosaicking should work.  Another thing to try is creating a raster catalog or mosaic dataset and then using either the Raster Catalog to Raster Dataset tool or Export Raster to Different Format for the mosaic dataset. ... View more

I am not sure what may be causing the strange output.  Instead of creating a layer file, try using the layer in ArcScene with the extrusion as the input to the Layer 3D to Feature Class tool.  All of the 3D layer properties may not be being saved correctly to the layer file. ... View more

Josh, The MrSID format is a highly compresses raster dataset that is a proprietary format from LizardTech.  The compression can easily cause a 1GB raster to become 20GB when uncompressed.  When you are mosaicking the MrSID images they are being uncompressed  before being processed to the new format.  You are probably going to have a difficult time trying to accomplish this task depending upon the file size.  I would suggest checking the uncompressed size of each MrSID image to get an idea of the total size of the output file.  If the total size of the raster seems reasonable to be processed, then there may be other issues specific to the software or system settings.  -Timothy ... View more

Anna, Your sample points and pour points are different.  The pour points are usually the high values from a flow accumulation raster.  In essence it is the lowest point along the boundary of a watershed.  Once you manually determine these points then you can use the Snap Pour Point tool to snap the points to the highest value in that particular are of the point.  Check out the following documents for more information: How Watershed works Understanding drainage systems -Timothy ... View more

To add to my previous post... You can used the Hydrology toolset within Spatial Analyst to calculate the upslope contributing area with probably the Flow Direction tool.  It all depends on what exactly you are looking for.  There are some other tools within the Hydrology toolset that may be helpful to your project. The slope can be be calculated by using the Slope tool within the Surface toolset. ... View more

You should not have to create the multipatch file.  As long as you set the extrusion so the layer displays in 3D within ArcScene then the layers should carry the 3D properties to KML.  Make sure the 'Return single composite image' option is not checked as this will create a raster overlay image.  If that does not work, you can use the Layer 3D to Feature Class tool to convert it to a multipatch to see if you are getting any different results.  Before using this tool, make sure that the 3D properties have been set so that they display correctly in 3D. ... View more

Hi Anna! Yes, the Spatial Analyst extension tools are what you should be using.  You can either clip the DEM to the boundary or you can set the processing extent to the boundary in the environment settings of the tool.  You will need to first calculate the slope, upslope contributing area and topographic wetness index.  Then with these rasters use the Extract Values to Points tool to get the values of the underlying raster for each point. I hope this helps.  Let me know if you have any questions. -Timothy ... View more

Try using the Layer to KML tool from ArcScene.  The 3D properties from the layer will export to the KML.  I just tested this process on a multipatch feature class and the KML opened in Google Earth in 3D.  Make sure you properly setting the reference scale or they may not display correctly.  Look at the 'Setting 3D display properties' section in Preparing your map documents in ArcGIS for KML publishing for some additional tips. ... View more

Hi Kate, What is the uncompressed size of your input data?  What geographic area does this data cover?  You may need to process the data in subsets. -Timothy ... View more

The .ovr file is the new overview pyramid file that is created in ArcGIS 10.  In prior version of ArcGIS the .rrd file was created for the pyramids.  These file improve the raster display performance. You can use the Build Pyramid tool and define within the Pyramid Environment settings to set the compression. ... View more