Latest Contributions by PrasantaBhattarai

There might be different ways to do it. Here's what came on my mind: Use Viewshed tool to create a viewshed raster. - Use All points of one of the areas as observer point feature. You can add OFFSETA field and add 1.7 for observer offset. (Here's more on Using Viewshed and Observer Points for visibility analysis) - Output from the Viewshed tool is a raster which you can use to see how many points from your target area fall under the visible/non visible area. - If you look into the output raster attribute table, the Value will tell you how many observer point can see that particular area, but it is not possible to tell which observer point can see what area/target point. --- If you are using 10, you can Iterate feature (observer points) and create individual Viewshed raster. This way, you can tell which which point from the target fall under visible/not visible area for a particular observer point. --- Hope this helps!! ... View more

Did you already try re-creating the terrain? ... View more

I would recommend you to create a terrain instead of TIN as there is a limitation on number of nodes with TINs. Once a terrain is created, you can run Terrain to Raster tool to generate a raster surface. From the help documentation: The maximum allowable size of a TIN varies relative to free, contiguous, memory resources. 10 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. ... View more

I checked the dae you uploaded and also re-created one from the shape you provided. Imported both to SketchUp 8. The one you uploaded had issue, but not the one I exported  (attached image - yellow from new Collada). I would suggest you to re-run Multipatch to Collada to generate a new .dae. Your multipatch does not have issue as I was able to export it to Collada from with no issue. Please note that I am running ArcGIS Desktop 10 SP3. ... View more

I have a set of single band tiff images that change from black line, transparent background to transparent line, black background when zoomed in past a certain point.  The opposite happens when you zoom out if the image symbology is set to have black line, transparent background when zoomed in.  I would like to have black line, transparent background at all scales.  Any thoughts on how to address this issue would be appreciated. Are these 1-Bit images? If so, there was an issue with overviews/pyramid for 1-bit images in ArcGIS 10. These raster used to display with inverted color ramp. Workaround for this is to delete the overviews (.ovr) files and build the pyramids/overviews with bilinear interpolation. This issue has already been fixed with Service Pack 2 for ArcGIS Desktop. Please make sure that you have the latest service pack installed and see if the issue still exists. ... View more

How do I saperate them now? 😛 I have these circular features in one layer. Each Circle has a unique ID. Can i Split and save these features into separate layers automatically and use them in the model you described earlier? You do not need to seperate the features into multiple feature layers. When you are using iterate feature selection in model builder, each polygon feature will be selected and used as clipping extent. The clip tool will run in multiple iteration each time selecting a different polygon feature from your layer. See more examples of using iterators in ModelBuilder on our web-help. ... View more

If in ArcGIS 10, you can use the Iterators in model builder to clip out the raster with each region. If you already have a polygon feature for these regions, you can use it. If not, Reclassify your raster to a single value and convert it to polygons using Raster to Polygon. You can then use model builder and insert > iterators > Iterate feature selection. Add Clip raster tool into model and use iterated feature as output extent. For clip tool, check the option to �??use input feature for clipping geometry�?� ... View more

If you can see image at the base pixel level, raster pyramids might not have built correctly or are corrupt. How did you build pyramids on the raster? Did you use Build Pyramid geoprocessing tool, or let ArcMap/Catalog build pyramid when you first added/previewed the raster. I understand it takes some time but you can try re-building pyramids using geoprocessing tool (Toolboxes\Data Management Tools\Raster\Raster Properties\Build Pyramids). What kind of raster is it? Bilinear interpolation or cubic convolution should be used for continuous data such as satellite imagery or aerial photography and it is recommended that you use nearest neighbor for discrete (nominal) data or raster datasets with color maps, such as land-use data, scanned maps, and pseudo color images.  You can set the pyramid resampling method from Environment Settings > Raster Storage > Pyramid resampling technique when building pyramid from geoprocessing tools. ... View more

Here's some help on color correcting raster data. You can also try creating a mosaic dataset from your raster and use color correcting a mosaic dataset. I hope this helps. ... View more

One way to do this is to create a clipping polygon to limit the output, but then I will have to manually create these polygons.  I am wondering if there is a better and more automated way to do this. Have you gone through this help documentation regarding Data area delineation from lidar points? This might help you automate the process of creating clipping polygon. ... View more

Hi everyone, It's very frustrating for me as I really need this functionality for my research. If anyone knows workarounds or other software that will do the trick I would be much oblidged too. Thanks Victor If you are still not able to run difference 3D after making sure they are closed multipatch, and you requre complex editing for your multipatch, you can export your multipatch to Collada. You can then load and edit the Collada files in SketchUp (or other 3D editing software). You can make necessary edits in SketchUp then bring it back to ArcGIS. You can use the 3D Editor > Replace with Model command to replace existing multipatch with the model that you have edited using SketchUp. I hope this helps. ... View more

Is the output workspace a geodatabase? In order for texture to appear, multipatch should reside inside a geodatabase. ... View more

You can use these custom variables (OFFSETA, OFFSETB etc) by adding them into the feature attribute table. Please see the KB article below: http://support.esri.com/en/knowledgebase/techarticles/detail/31149 ... View more

Here's one example video of Subsurface Visualization. The video shows how to create a fence diagram, cross section from borehole data using 3D Analyst in ArcScene. http://resources.arcgis.com/gallery/video/3dgis General workflow of the tools used on this video is outlined on this forum post: http://forums.arcgis.com/threads/6973-creating-cross-sections-in-arcscene ... View more

Not sure if this is giving the problem!! On your code, for: fcDICT["bndgrid"] = r"X:\gbp\Deliverables\2012\GBtools\tmpIP\bndgrid " I see that there is an extra space on the path name, ...\...\bndgrid " Try removing extra space after \bndgrid, I think it's worth trying!! ... View more