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4

You can use Zonal Statistics as Table (Spatial Analyst) for this type of operation. The tool accepts both vector and raster data as input. You can join the results to your input feature class if you wish.


3

The error in your "RastertoPolygon" script is due to a space in the file name of one or more of your input rasters. To confirm this answer, I ran your script on a folder of raster files and it worked perfectly. I added a space to the file name of one of the rasters and it failed with the message "ExecuteError: ERROR 010328: Syntax error at or near symbol ...


3

All heights are based on or relative to the DEM being used in the analysis. The tools use specially named attributes to pull in some relevant values for the observer and targets. These are discussed in the help files, in particular Using Viewshed and Observer Points for visibility analysis. There are two in particular that apply to this situation, and two ...


2

Per this link explaining viewshed: yes, yes, and yes. The tool interpolates z-values based on the surface. Since your bridge will be a given elevation above the surface, you'd need to use an OFFSETA field to control. For the bridge itself, you'll need to do some work to calculate its distance (OFFSETA) for each point (vertice in the line). The resolution ...


2

This blog has some explanations, here is a brief excerpt from one of the answers: When you use a barrier, every IDW calculation--that's one per output grid cell--has to involve a check against the barrier file for every possible neighbor. The more features there are (you have 1088) and the more vertices they have (you have 23,938), the longer it ...


2

Because this analysis is local--the result in any cell depends only on the stack of values in that cell--we might look first to the Local Toolset for inspiration. It is best when such tools can be applied without any preliminary transformation of the data, because that avoids a potentially time-consuming loop over all the rasters. Perhaps the most general ...


2

If you are running the tool outside of ArcGIS session, in Python (or when in the Python window and the extension has not already been enabled), you will need to check out an ArcGIS Spatial Analyst extension license before running a tool. You do it with: arcpy.CheckOutExtension("Spatial")


2

You need the spatial analyst extension to run spatial analyst tools on Server. You'd see an entry like: spatialserver,100,ecp..... You can see the license matrix here. If you believe you should have spatial analyst based on what license/extensions you should have, but dont see it in that file, you should contact either Esri Customer Service or your ...


1

It sounds like you have a license for the ArcGIS Desktop Spatial Analyst Extension, but not ArcGIS Spatial Analyst for Server. You will need to purchase one to use that functionality.


1

This is more a civil engineering / grading exercise than a GIS one. I'm not sure what your raster is (imagery? a DEM?) so I will ignore that unless you provide more details. The first thing you need to do is establish what 'level' is. Do you want it absolutely flat, or with some slope for drainage? Then you need to establish how you want to level the area. ...



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