Latest Contributions by EricRice

Hi Rob, What version of ArcGIS are you using?  In 10.1 you can readily make use of the lidar data assuming its in LAS format. You can use it to derive your own DEM/DSM.  Perhaps the .dem file you have is not a USGS .dem file?  Is it available publicly - so I could download it and have a look? Best, Eric ... View more

Rob, The DEM to Raster tool is somewhat of a legacy tool that is not needed in the past few releases.  Assuming you have a USGS .dem file format, you should be able to navigate to it in the Catalog window of ArcMap, right click it and calculate statistics.  After you have stats we just draw the data.  You'll probably have to assign a spatial reference too though.  Basically, .dem files have native support nowadays so there is no need to run the tool. Eric ... View more

See Spatial Join tool. Regards, Eric ... View more

This may be a good starting point for understanding the results. What is a z-score? What is a p-value? Without Spatial Analyst you are somewhat limited.  I suggested this because of the time constraints it appeared you were under.  There is significant reading to undertake to fully understand the Spatial Statistics Toolset.  Best, Eric ... View more

Mark, You can do a hot spot analysis with tools inside the Spatial Statistics toolset, which is part of the core product.  Have a look at the Mapping Clusters toolset.  Also check out How Hot Spot Analysis (Getis-Ord Gi*) works and the section, Visualizing Space-Time Results from Space-Time Cluster Analysis. Best Regards, Eric ... View more

Hi Patrick, There is a tool called Reverse Geocode in the Geocoding Toolset.  This should get you going. Best, Eric ... View more

Hi Joshua, Have you tried the ASCII 3D to Feature Class tool?  This will get you points that you can convert to raster or use to interpolate a raster. Best, Eric ... View more

Jason W. Have you considered running the Add XY Coordinates tool?  If the input is Z aware it will return the Z value from the Shape field as an output attribute. Best, Eric ... View more

Hi Charles, You can run the Zonal Histogram geoprocessing tool in batch mode (right click tool and select Batch) or you could throw the tool in a model and insert a raster iterator in front to loop through many rasters.  The iterator option assumes that your zone is constant for all rasters.  If the zone input changes when the input value raster changes then you should use Python because Model builder restricts itself to one iterator per model.  This tool will allow you to output to .dbf table.  Use the parameter, Output Table. Best, Eric ... View more

Hi Ryan, This is a common question.  You can find the solution via Con(IsNull) command in the raster calculator.  For details, see this Support Services blog, How to add different-sized rasters with NoData Values ,  or you can see other forums with the same question such as this one. http://forums.arcgis.com/threads/33347-Raster-Extents-Calculator-Problems When you convert the polygons to raster, you should set the extent to be the same as the DEM and the same pixel size as the DEM.  Then Con(IsNull) will give you no problems. Best, Eric ... View more

Hi Tashina, Your data is most likely using a geographic coordinate system.  TIN's should be constructed with data in a projected coordinate system.  As for ArcScene, it is interpreting the Z unit to be decimal degrees (from the GCS) so it displays like that.  You'll find it displays as you would expect if you have units of feet/meters instead of decimal degrees. Best, Eric ... View more

See TIN to Raster or Terrain to Raster tools. Eric ... View more

Greetings, TIN's have a physical limit of ~15 million data nodes. If you build a TIN with just one tile of contours, and check the properties of the TIN, how many data nodes does it have? This should help you somewhat estimate the total node count of all contour tiles. You're most likely way over 15 million since every vertice in the contour is considered a node. Ideally, you should only put 4 or 5 million data nodes in a TIN for performance reasons. You should consider building a Geodatabase terrain dataset. What is a terrain dataset? (Terrains exist in 9.3.1 even though this is the 10.1 help link) Best, Eric ... View more

Andrew, What is the coordinate system of the input? The units of the coordinate system are the units on the output distances. If you need other units, you'll have to run the Project/Project Raster tool to get desired units or make use of the Output Coordinate System in the environment settings. Is your input raster or feature? If feature, are you using Cell Size setting in the environments? Best, Eric ... View more