Spatial Analyst is a extension within ArcGIS that provides a range of spatial modeling and analysis tools.

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Raster classification based on different attribute? [duplicate]

I have a raster based on value, I want to convert it into another raster based on a different attribute for e.g. area, what is the function?
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41 views

Calculate the frequency of classes of neighbouring raster cells

I'm struggling with a problem when working with a raster dataset of biotope types: For each cell I would like to find out the frequency of classes in the adjacent cells, e.g. from the 8 neighbouring ...
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56 views

Calculating watershed using snap pour points?

I am trying to calculate a watershed layer and have followed instructions from this previous question: General steps to create watershed boundary I have combined all these steps and run it as one in ...
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33 views

How to calculate spatial GINI coefficient for land use

I am interested in calculating an index of agricultural land inequality for Brazil. I'm thinking that a GINI coefficient would be a good approach given traditional uses of GINI. I have a data set for ...
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34 views

CellStatistics is not defined error

Code : >>> import arcpy >>> ras1 = arcpy.Raster(r'D:\IMD\test_converted1961.img') >>> ras2 = arcpy.Raster(r'D:\IMD\test_converted1961_fliped_ud1.img') >>> result = ...
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1answer
190 views

Script Error 'Invalid Pointer' in Spatial Analyst Tool

I have ArcGis 10.3 (previously 10.2 version) running on Windows 10 (previously Windows 8). My GIS licence is provide by my company where I have an intership, so I can't just uninstall/install back the ...
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64 views

con statement outputs using arcpy.sa.Con doesn't ignore NoData

In ArcGIS 10.2, using the Con tool, I ran a conditional statement to return RasterA where RasterB value >0. That worked fine. Transferring the code into python, the statement reads something like: ...
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2answers
57 views

I have slope raster and that is categorized with slope in percentage(%) but my script not successful

I have slope raster and that is categorized with slope in percentage(%) my condition is if slope <= 1 then m = 0.2 1 < slope <= 3 then m = ...
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7 views

Changing raster values in ArcGIS for Desktop? [duplicate]

I'm performing a water outflow analysis in ArcGIS. I have converted a Polygon and a Line to a raster (surface and streams). Now i want to change the values in these rasters so the water pixels have ...
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2answers
103 views

Extracting multiple Subdataset from hdf files to geotiff format using ArcPy?

I have 165 hdf files(monthly data) of EVI(Enhanced Vegetation Index) , I need to convert them to a geotiff format. In ArcMap 10.1 I can only extract the data one file at a time. I have this python ...
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1answer
40 views

Filling raster gaps in ArcMap based zone layer?

I have the following raster layer that has data gaps. I can use focal statistics to fill them: Con(IsNull("raster"), FocalStatistics("raster", NbrRectangle(5,5, "CELL"), "MEAN"), "raster") However, ...
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95 views

Average value of polygons within a set distance from a point

I have two vector layers: one polygon and one point layer. The polygon layer has a value from 1 to 10. I am trying to find the average value for all polygons within or partly within a 1-mile radius of ...
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72 views

ArcMap Spatial Analyst - Kernel Density Estimation Produces Blank Rasters

My problem is with the Kernel Density operation in Spatial Analyst. ArcMap produces blank rasters for some reason when given a normal point feature class as input. I had no problem creating the ...
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16 views

arcgis extensions for GWPCA [duplicate]

Dose anyone knows if there is any toolbox or extension for calculate GWPCA (geographic weighted principal component analysis) in arcgis ? I know there is package for that in R but i dont know anything ...
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1answer
80 views

How to handle temp files created during Extract by Mask (Spatial Analyst)?

I have three scripts running simultaneously that processes raster data in several directories. The problem I am encountering is that ArcGIS is creating a temporary grid file called 'Extract_recl1' ...
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44 views

Raster Calculator subtraction giving wrong difference

I'm performing a pretty simple subtraction: The values of the resulting raster are correct for some pixels: But many pixels are calculated wrong: Which settings do I have to change to get ...
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1answer
21 views

appending country names to route feature class

I have a polyline feature class made up of multiple segments. This feature class overlays a polygon feature class representing the countries through which this polyline is going. For each segment, I ...
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37 views

Figuring out if points are the same in FME

So I am working on a project using spatial point data in FME. Both files contain 500 points and the hope is they are all the same. To figure out if any are different I was thinking of using ...
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46 views

Zonal histogram script VALUE row suffix problem

I'm running 2 Python scripts. The first it is to apply Zonal Histogram to several rasters. The second it is for saving the Zonal Histograms to a text file. My problem is when the first script creates ...
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18 views

How to find mean and standard deviation of MCAR model using mcmc methods

I perform analysis of spatial data with MCAR model and I use spbayes package, the problem what I find is how to find 1.mean and standard deviation of the model.and then make the histogram of mean and ...
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1answer
23 views

Number of events within each elevation class

I'm trying to model how elevation affects fire events for an AOI, I have run my cluster analysis for the fire events and right now I'm trying to calculate how many fire events fall within each ...
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29 views

Can I interpolate but follow the trend of another surface?

I have a point data set will a fairly low sample density and a raster that should loosely correlate with the values of the points. For example, this could be elevation and temperature readings. I want ...
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38 views

raster calculator (spatial analyst) tool not working in arcpy [duplicate]

I am using arcpy and while running the script it is unable to find RasterCalculator() method? Even after imporiting arpy module >>> RasterCalculator("IDSI_2002.img + ...
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3answers
55 views

Checking where values are the same between 2 rasters

I am working in ArcGIS 10.3 and I am trying to discover where the output of two different models agree. two models were run for the risk of contamination with a carcinogenic toxin. The output of each ...
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1answer
53 views

Determining raster intersection using ArcGIS for Desktop?

Using Arc 10.2.2 with Spatial Analyst, I need to determine the spatial intersection of two rasters (both rasters are in the same coordinate system, and are aligned to the same snap raster). The two ...
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51 views

Arcpy.sa NoData issue with saving TIFF

Similar to the poster here, I am attempting to convert numerical NoData values to actual NoData cells. The solution in the linked question doesn't work for me, however, as when I use the save method ...
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2answers
119 views

“ERROR 010214: Unable to read STA of…” while running Arc Hydro Geoprocessing Tools

Today I tried running the Combined Terrain with Unknown Sink and Stream Locations Tool from the Arc Hydro Toolset (version 10.3.0.58, ArcMap 10.3). As input I used a DTM with values between -10 and 19 ...
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1answer
62 views

Average of raster elevation based on polygon boundaries

I am attempting to extract and calculate the average height of buildings using LiDAR converted to raster elevation data. I've created a DSM to cover the entire area and I am trying to extract just the ...
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1answer
88 views

Too many zones for Zonal Histogram?

I have 45 tif tiles each of 20-50MB and a single shp file with about 4000 polygons. I want to run zonal histogram in Arcmap 10 to get the number of pixels with each value for each polygon. If I ...
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1answer
143 views

Creating Heatmap from attribute value of point features in ArcGIS for Desktop?

I've run through tutorial from ArcGIS on how to create a heat map using Spatial Analysis. Based on the example, point features are scattered around the map and we need do the following to generate ...
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1answer
34 views

Writing only final raster with intermediate bands going to disk using ArcPy?

I have a raster with 4 bands. I would like to create a new raster (its individual bands called new_band) from this raster (its individual bands called old_band) in with : new_band1 = old_band1 * 2 ...
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43 views

How to create separate viewsheds for individual points?

I have a feature class with 3000 points. My goal is to have a viewshed, at each point, clipped to 50m and 500m buffers. I want to be able to look at the percent visible/not visible for each point. I ...
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69 views

Viewshed analysis on building

I'm trying to run a viewshed analysis of building. My original building layer was a vector which had a height attribute. I converted this to raster and added my elevation layer to my building raster ...
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57 views

Is there a difference between tools with same name in the ArcGIS 3D Analyst and Spatial Analyst toolboxes?

There are several of the same tools within the 3D Analyst and Spatial Analyst toolboxes (for example, Reclassify and Visibility). Is the same tool being accessed regardless of whether it is found ...
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49 views

applying Image regression in landsat image

I have two different date of Landsat image.I want to do change detection using image regression method.Is it possible to do image regression in Erdas Imagine or ARCGIS? How can I develop a model for ...
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1answer
87 views

Slope (Spatial Analyst) output shapefile having weird values

I'm trying to calculate the slope for a raster layer using ArcMap 10.2 and the Slope (Spatial Analyst) function. The raster I'm using is an NED 10m mosaic DEM, and the mosaic's datum is in WGS 1984. I ...
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59 views

Watershed delineation for multiple points in a single shapefile

I have a shapefile with 23 points along a 11 km river and I wish to create upstream watershed boundaries for each point without having to split the shapefile into 23 individual points. I have snapped ...
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1answer
73 views

Grouping points using grouping analysis to look at raster characteristics within overlapping buffers?

I want to extract averages from raster data that fall within buffer zones around a village point. The problem is that the villages are pretty close together in some places and I need to come up with ...
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1answer
88 views

Resample not changing the cell size

I am trying to use the Resample tool in Spatial Analyst to go from a 1kmx1km grid to a 500mx500m grid for increased resolution of my land use data. My cell size is 0.008, and I want a 0.004 cell ...
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1answer
78 views

ArcGIS method for declustering a spatial dataset?

I have previously asked this question but perhaps was using the wrong terminology. I would like to run some type of cell declustering on a spatial dataset. Is there a tool for doing this in Arc? ...
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47 views

Errors when using Spatial Analyst to Extract Values to Points?

I have a raster that I have classified into three slope positions and a points layer of bird nest locations. I'd like to add the layers together and use this to determine which of the three slope ...
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2answers
86 views

Alternative to nested Con statements in python

I have a nested con statement that I'd like to put into a script, as it's hard to follow in its current form. The raster it produces is incorrect, so it'd be easier to debug in a script. The ...
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18 views

Merging line features to produce bicycle friendly streets connectivity layer?

I was wanting to produce a connectivity of bicycle friendly streets layer. For my analysis, bicycle friendly streets are off-road cycle paths, local roads and on-road cycle paths. I have separate: ...
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1answer
70 views

Check if night hours (TimeWithinDay; AreaSolarRadiation)

I am creating a script that uses AreaSolarRadiation. Currently arcpy gives a cryptic error during the night hours. arcgisscripting.ExecuteError: ERROR 999999: Error executing function. Failed to ...
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40 views

Distance Analysis from single point to multiple points on vector layers

Is it possible to do the following in QGIS: Create a text file that plots the distance from a single point (stored in one layer) and multiple points (stored in another layer). I have tried to use ...
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2answers
127 views

Selecting Specific Elevation Areas Contiguous to the Coastline for Coastal Flood Mapping

This is less a problem than an inquiry into a better way of doing something. I am curious how people might go about selecting, say, all areas less than or equal to 10 feet (from a DEM) that are ...
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1answer
223 views

Create largest circle (maximum radius) inside a polygon in ArcGIS for Desktop?

I am trying to create the largest possible circle inside a polygon including its perimeter and area size. I created via minimum boundary geometry the smallest possible circle outside a polygon (see ...
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1answer
57 views

Adding multiple rasters produces unexpected results. I have set the data extent to the same in all rasters

I am trying to add three rasters together. I'm trying to figure out where I am going wrong so I am going to list out what I am doing: I have Raster_1, Raster_2 and Raster_3. Raster_1 and Raster_2 ...
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12 views

Maximum Distance Nearest Neighbor and a Unknown Coordinate [duplicate]

Is there a way to solve this problem using ArcGIS? What coordinate within the blue polygon (2-dimensional) maximizes the distance between the unknown coordinate and the nearest neighbor (neighbor = ...
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61 views

Tabulate Area 2 Tool not returning correct area

I am having trouble with the output of the "Tabulate Area 2" tool in the following update: http://blogs.esri.com/esri/arcgis/2013/11/26/new-spatial-analyst-supplemental-tools-v1-3/ I have a layer of ...