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7

To close a multipatch feature, it must completely enclose a volume. Multipatch features created with the Interpolate multipatch to polygon (using a surface) tool can likely not be closed. (Unless you extrude between 2 TIN surfaces which should produce a closed multipatch. Personally, I have not had a lot of success using "Extrude Between" with complex ...


7

Any OpenGL card should work well, whether NVidia or AMD. This quote from ArcGIS Desktop Help, gives a basic discussion of what graphics card you should buy for 3D Analyst: Which graphics card should I buy? A good OpenGL-compliant graphics card with at least 64 MB of texture memory is recommended. Most desktop systems come equipped with power ...


6

Viewshed analysis calculates the number of observers that can see a given location. No identification is given as which observers can see that location. The result is simply a single numeric value. If you have 10 viewpoints, then your resultant raster will have values in the range 0 - 10. Observer Points calculates visibility in the same way but the ...


6

You're not actually 'reprojecting' the data (the coordinate system, that is), you're simply multiplying it by a constant (as in the 'times' tool in ArcGIS) to change the pixel values from one number to another, so you can use the QGIS Raster Calculator to do this.


5

I think in the end i will stay with the USGS Envison system. Their stand visualization system in fact has a geographical component, but prior to the visualization you have to format your data locations corresponding to your plot size. First create a tbl file with the following parameter (From the Tbl2svs help) The following example shows a stand ...


5

You can build a terrain dataset from points or lines as well as ASCII grids. No need to convert to LAS points, all you need is a multipoint feature class (which can be created from any of the above).


5

From your diagram it appears that you're interested in the points where the change in gradient is the most. Since the gradient of a line measures the rate of change (i.e. can be considered the derivative), then the gradient of the gradient is the rate of change of the gradient (i.e. can be considered the second derivative). So from this assumption we can say ...


4

Check out the NVS Vector Stream Tool which ... is a user-friendly ArcCatalog (9.3.x) Toolbox geoprocessing tool which simply assigns a numeric order to segments of a poly line feature class. Unlike the Spatial Analyst Tools for Hydrography, this tool solely uses vector stream data instead of raster stream data accompanied by a flow direction ...


4

From my experience (also not a remote sensing expert), it's very hard to get accurate building outlines. If it is not a huge area, it might be worth manually tracing the buildings and then doing a spatial join with the LIDAR data to get the building heights.


4

There's a distinct possibility that ArcScene is running up against the default Win32 process limit of 2GB. Originally, due to this limitation, ESRI was designing their 3D products to max out at around 20 million points. Update: ESRI support note on the TIN size limitation (~15 million, dated 2008)


4

Spatial Analyst is a module within arcpy which allows the from _ import * syntax. 3D is not a module so you can't import it that way.


4

You can try the Virtual Terrain Project. The goal of VTP is to foster the creation of tools for easily constructing any part of the real world in interactive, 3D digital form. This goal will require a synergetic convergence of the fields of CAD, GIS, visual simulation, surveying and remote sensing. VTP gathers information and tracks progress ...


4

According to the licensing information, they probably share the same algorithms Licensing Information ArcGIS for Desktop Basic: Requires 3D Analyst or Spatial Analyst ArcGIS for Desktop Standard: Requires 3D Analyst or Spatial Analyst ArcGIS for Desktop Advanced: Requires 3D Analyst or Spatial Analyst And it can't be done without one of those two ...


4

First you need to enable the extension (if you have the license for this): Create TIN (3D Analyst) http://resources.arcgis.com/en/help/main/10.2/index.html#//00q90000001v000000 You can search for this:


4

you can do this with the raster calculator, but probably not as easy as a sum because you probably have NoData values where there is no forest . In this case, here is a more robust method : Con(IsNull("converted_polygon"), "DEM", "DEM" + "converted_polygon" )


4

If your application is running inside of ArcGIS your product license should handle the activation of extensions for you. Failing that you can always use ArcObjects to check out the required extensions. How to use extensions (ArcObjects) Extensions provide additional functionality to applications. Before using the functionality provided in an ...


4

Perhaps one of these two methods will work for you: ArcMAP Select by Location 3D relationships and ArcScene Select by 3D Box How about Inside 3D (3D Analyst)? Since the output of Extrude Between is a feature class with multipatch 3D features, can you use this tool to identify the 3D Point features which are within the resulting soil horizons? Can you ...


3

According to the ArcGIS Resource Center the tool: Tests each multipatch to see if it completely encloses a volume. Then adds a new field with a flag for each multipatch feature in the input layer or feature class indicating if that feature is closed or not. It could be that changing the order of the vertices closes the volume while others don't and ...


3

The only way we found to get a triangular mesh with existing topology into ArcGIS was to use the arcpy.LandXMLToTin_3d function. It's a bit crazy to have to write out a LandXML file just to get your TIN into Arc, but it works. Here is a Python Toolbox for ArcGIS10.1 that accesses data on a triangular mesh from an ocean model, and brings it into ArcGIS as a ...


3

When features are added to a TIN, there needs to be some way to define where their heights come from. If you are inputting 3D features, you can specify the Shape field as the height source. This indicates the z-values will be taken directly from the feature geometry. When adding 2D features, you can reference a numeric field. You can also specify None, in ...


3

There is no difference between Viewshed-3D and Viewshed-Spatial in terms of functionality. As per page 7 of the functionality matrix here: http://www.esri.com/library/brochures/pdfs/arcgis-server-functionality-matrix.pdf You can add extensions to ArcGIS Server Standard. You'd have to add one of those extensions to do Viewshed. My answer above was for ...


3

Canadian Hydrographic Service may be your only choice, I'm afraid. LIO is supposed to have line and point bathymetry data, but their login and search tools are going off into hyperspace for me right now. My friend was lucky in that the lakes he was interested in had just had a very detailed survey in advance of the G8, and CHS (apparently) don't maintain ...


3

Work with "Terrain" in ArcGIS instead of standard TIN. Then you will have the option of saving several "resolutions" and your rendering will be less of a problem. When zooming out, it will show a rough resolution, when zooming in, the resolution will increase. http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//005v00000002000000.htm.


3

If you do not care about what happens between your two ends (not that this is dangerous for long roads in hilly regions), here are the steps : 1) feature vertices to points (ask for START and for END) 2) extract values to points (for both sets of points, don't forget to check the "interpolate" box) 3) join by attributes (based on ID) the starts and the ...


3

I would use this approach: Add flood deep to DTM to create a new surface raster (use Plus (3D Analyst) tool). Drape the flood raster to the new surface.


3

I had the same problem using some SRTM DEMs. Besides from using some later and more correct version or another data source, I'd recommend setting all values below some chosen threshold (that will only select the hole pixels) to NoData (=erase them) and then re-interpolating them according to the surrounding pixels so that there will at least be no excesses.


3

It is possible to turn borehole logs (XYZ points) into 3D polylines. I wrote a sript a few years ago that did just that but it was with ArcObjects. Each group of points had a unique value and I just looped and constructed 3D lines using the points as ToPoint and FromPoint and assigned soil type attribute to each line. Once complete I symbolized on soil type ...


3

The raster quality is deliberately downgraded to increase display speed. See the Rendering tab of the raster layer properties in ArcScene and crank up the slider bar second bottom.


2

I'm going to guess that the "around 20%" where your CPU utilization is maxing out is really 16% ... because you may only be actually using one of the six cores. ArcScene may not be able to effectively utilize more than one core at a time for a single session. ArcScene just may not be the right tool, depending on what it is you're trying to do. If you ...


2

http://edndoc.esri.com/arcobjects/9.2/java/api/arcobjects/com/esri/arcgis/globecore/IGlobeViewUtilProxy.html#queryVisibleGeographicExtent%28com.esri.arcgis.geometry.IEnvelope%29 There's the answer. QueryVisibleGeographicExtent - pass in an empty Envelope Class and it returns the extent.



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