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

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Extracting pixels with value in one raster but NoData in other raster?

I have two raster A and B, and they are representing the info for Florida. Ideally A and B should have same coverage. However, due to some data processing issue, B's boundary is a bit smaller than A's....
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1answer
18 views

Do integer values in a Confidence Raster correspond with a specific probability %?

I have been using the Maximum Likelihood Tool (Spatial Analyst extension, ArcMap 10.3.1) to classify a number of rasters into "Vegetation" and "Bare Ground" classes. I'd like to have some sort of ...
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1answer
24 views

Error when running Extract by Mask Script

I am using ArcGIS 10.3 Desktop to write a script tool to, among other things, extract raster data using a mask. I keep getting these errors: ExecuteError: ERROR 000875: Output raster: C:\...
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24 views

Removing pixels in raster map using ArcGIS for Desktop?

I made a raster. I wonder how can I remove pixels with values lesser than an specific value? for example How is possible to set the value of classes from 0.92? i have searched it and i found this ...
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21 views

how to do classification when the spatial analysis toolbox is not available?

I am required to do classification on a polygon feature class based on the rage data. However, I have realised that our ArcGIS lisense does not have "Spatial Analysis" toolbox as active, therefore I ...
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7 views

What does Geostatistical Analyst use to export to vector

I have three maps I need to create and two can be created in GA while the third needs to be created in Spatial Analyst but would like all three to have a similar appearance. When I use Inverse ...
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12 views

Querying points based on multiple gdb-based layers?

I have several dozen different gdb data sets that collectively make up the areas that I'm looking at in QGIS. I have two additional shapefiles with points and I need to figure out which of those ...
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16 views

Interpreting output from PCA tool of ArcGIS for Desktop?

I am looking for some assistance on interpreting the output from a PCA run in Arcmap. My data is comprised of 6 raster bands representing biophysical elements in the marine environment (SST, ...
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36 views

Averaging large number of raster layers using ArcGIS for Desktop?

I have a large number of rasters (300+) I would like to average using Raster Calculator as is explained at How do I average a set of rasters? I know I can manually select each raster by double-...
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28 views

Using land cover data and a polygon layer to identify areas of interest

I have land cover in a raster file and a polygon layer with park boundaries. I need to take 2 of the land cover categories (trees, brush/shrubs) and look at areas with this type of cover that are ...
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13 views

Using Extract Multi Values To Points to return OBJ ID not actual attribute values?

This code extracts the OBJECTid from the rasters. Is there a way to obtain the actual attribute values? EMVTP (http://desktop.arcgis.com/en/arcmap/10.3/tools/spatial-analyst-toolbox/extract-multi-...
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18 views

Cropscape Change Analysis

I have two raster data layers from cropscape for 2014 and 2015 that have been clipped to Fresno County. I want to look at the change in almonds between these two years (if and where almonds were added ...
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22 views

Time distance by roads from specified point (raster analysis)

I just started to learn arcgis, so even simple tasks looks difficult to me. Can you give me please some guidelines how to create raster where each cell contains time distance by road from specified ...
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1answer
83 views

How to Calculate NDWI Value in Arcgis 10.1?

I want to delineate surface water feature of my Landsat raster image and also want to calculate the area of water body. I have learned through internet that NDWI can be used to delineate open water ...
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34 views

How to examine each connected pixel to select its neighbors to separate clusters?

I am trying to develop a methodology for separating pixels from one another to determine whether they belong to a city cluster or not. Starting at the center pixel of the city I want to select all ...
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15 views

Determine which Polygon Attributes are the Majority Value as Defined by Second Polygon Shapefile

I need to determine the majority soil type within a series of polygons. I have data from the USDA Web Soil Survey (properly formatted and the like). I then have another shapefile with 60+ polygons ...
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32 views

Tool to count faulty point-curve connections and number of missing connections [closed]

is there any tool in arcgis/arcmap that shows faulty point-curve connection? For example two roads should be at "+" intersection, but they are not? And second- number of missing connections due to ...
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15 views

Surface attribute only calculated for actual points and not interpolated

When I run the surface hillshade, slope and aspect in the Arc Toolbox using my raster surface it appears to be calculating the attribute only for the data points and not for the interpolated areas ...
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22 views

Creating logical function in grid using con tool?

I have a precipitation grid with values but no attribute tables. How do I redefine the precipitation such that I can create a logic operation by condition con for e.g. a) P= 400 for P<=400 b) ...
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51 views

Thinning LiDAR points to remove redundant neighbors?

I'm trying to develop a workflow in ArcGIS with 3D Analyst or Spatial Analyst to intelligently thin a grid of spot elevation points created from a LiDAR DEM. The current point spacing is 1 meter. Some ...
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22 views

Raster result is different for arcpy.sa CON and arcpy.gp.Con_sa

I have to add two rasters, one bigger than the other, but before adding I have to set the value of NODATA of smaller raster to the value of bigger raster. So i used the following code to do it: ...
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11 views

Why ModelBuilder results do not display in map? [duplicate]

I am automating river network analysis using ModelBuilder by making a tool out of the different Hydrology Spatial Analyst Tools extension. When run individually, each tool in the set of tools has an ...
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20 views

Identify adjacent and no-adjacent polygons between multiple shapefiles using R?

My spatial data are recorded multiple years, providing one polygon for a year. (Polygon is derived from raster data, so I can use rasters instead if it will be easier to run my calculations). I ...
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1answer
42 views

Selecting polygons below (downhill of) lines using ArcGIS for Desktop?

I am hoping to identify sections of a trail system which are close enough to potentially add sediments to wetlands downhill. To this end, I would like to select polygons (wetlands) that are within a ...
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17 views

Focal statistics on polygon data

I am new to GIS and I am currently preparing/extracting my spatial data to prepare for analysis in R. At the moment, I am attempting to calculate 'summed cover of my predictor variable (i.e. ...
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73 views

Nested Con statement arcpy

I am trying to combine three conditions into one con statement line: ndvi_adjusted = Raster(ndvi_raw) * 0.004 - 0.08 con1 = Con(Raster(ndvi_adjusted) >= 0, ndvi_adjusted) con2 = Con(IsNull(con1), ...
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50 views

Getting distance from nearest stream and elevation to nearest stream?

I need to know if there are simple commands for this 2 points: the distance from the nearest stream, D [m], defined as the length of the path that hydrologically connects the location under exam to ...
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1answer
35 views

Fill NoData raster cells with floating point value of closest cell

I am working in ArcMap 10.3.1 with Spatial Analyst tools. I have a raster with some large contiguous areas with NoData. I want to assign the floating point value of the closest cell to each NoData ...
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22 views

Grid cell based on thresholded image?

I have different rasters in ArcGIS (thresholded images using OpenCV) containing different shapes defined by white pixels only. For each raster, I would like to create a grid of cells attributing ...
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1answer
21 views

How to group overlapping polygon features to generate unique feature ID?

I have a group on onshore leases that are overlapping and I want to generate a field attribute so that all the polygons (or centroids of the polygons) that overlap have a unique ID so that I can ...
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2answers
58 views

Extracting (x,y) of cells overlapped with polyline in ArcGIS for Desktop

I have a grid which is made up of 100*100 cells. I want each cell to be identified by its x (1 to 100) and y (1 to 100) value . For example the cell on the top left corner must be Identified as (1,1) ...
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11 views

Bivariate Moran's I and LISA statistics using two diverse variables at different time

I'd like to use the bivariate Moran's I and LISA statistics using two diverse variables at different time. For example, Population in 1990 and firms' localisation in 2000. Please, I would like to ...
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1answer
111 views

Error in In predict.gstat in R

I am trying to do kriging by gstat pcakge through R. Here is my Code: krg<-krige(var ~ 1,data,grid,model=vgm,nmax=30) But each time I recive this warning: 1: In predict.gstat(g, newdata = ...
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9 views

Invalid Pointer…Script Error [duplicate]

After working with Spatial Analyst (using multiple tools several times each) for a certain (unclear) amount of time, any tool I open provides the same warning... A script Error has occurred on the ...
3
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1answer
64 views

Calculate visibility with polygonal visual barriers

I have the raster file for my digitial elevation model as well as a polygon shapefile with polygons representing different kinds of environments (forest, field, meadow, etc), and wouldlike to ...
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1answer
55 views

Creating SpatialPolygons in R

I am trying to do kriging with my data. But there is a problem here. I want to use krige command in gstat package. But I do not have "Spatial object with prediction/simulation locations". How I can ...
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1answer
44 views

QGIS: intersect on a single shape file

I am using QGIS version 2.14.1 (Essen). I'm trying to do some spatial analysis, including an intersect between the same shape file. Basically I have a shape file with the geometries of all the events ...
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1answer
38 views

Create a flow network from a flow direction ARC GIS

First, I created a flow_direction from a DEM, then I applied corrections to this flow direction. Now my question, how to create a flow network (order flow) from a flow direction, that I already ...
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3answers
81 views

Extracting value of raster for specific points (with X and Y coord) and write to column in Attribute Table?

I have specific points in shp file and list of rasters in the same coord system and want to extract values from rasters for each point and place these values in column in Attribute Table of ...
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1answer
55 views

Constructing LS factor for RUSLE without outliers using ArcGIS for Desktop?

I'm using the following formula in RUSLE via raster calculator to obtain a LS factor Power(Flowacc)*1/22.1,.4)*Power(sin(slope)*.01745/.09,1.4)*1.4 My expected outcome is a raster from 0 to ...
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23 views

Finding regions or zones in raster DEM of similar slope or aspect values in ArcGIS for Desktop?

I have a detailed 5m DEM for my study area. I want to find regions or zones where the slope or aspect (or preferably both) varies little. In other words, a nice evenly sloped hillside with a ...
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18 views

Reduce raster resolution and determine pixel inclusion based on % pixel overlap

I'm trying to reduce the resolution of a raster from 1m to 50m using a pixel aggregation (average) method, but I need to set a threshold for inclusion (e.g. 75% of the 1m pixels must fall within the ...
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29 views

Interpolating logarithimic values - groundwater pH

I am using Spatial Analyst to interpolate surfaces for several groundwater parameters based on point observations at monitoring bores, including groundwater level and pH. It suddenly occurred to me ...
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2answers
40 views

Arcpy Reclassify by Standard Deviation

I would need some help with the Reclassify tool. I have written a script that produces rasters which I need to reclassify. My problem is, I want the values to be reclassified by standard deviation ...
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66 views

Flow Accumulation weight grid

I currently have several rasters relating to Landcover Soil data Topographic Wetness Index (TWI) Slope They are all re-classed to % infiltration. I'm looking to use these together as a weight ...
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1answer
104 views

In ArcGIS 10.1, for what tools does Environments actually work?

As a new user, often I have used "active" (that is, not grayed out and non-functional) Environments when using ArcToolbox Tools and the operation is non-responsive. I wish I documented for my own ...
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25 views

Zonal Statistics error with specific dataset combination

A colleague and I are trying to use ArcGIS's Zonal Statistics As Table to calculate the mean value of a raster within the features of a polygon layer. This always results in error 999999 "error ...
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2answers
35 views

Converting data in table created by Zonal Statistics as Table tool back into raster file?

In arcGIS 10 I have worked on a number of raster files, from which I have created one large table by using the Zonal statistics as Table Tool. I have a result as shown below (I have more than 70,000 ...
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2answers
114 views

SetNull() failing with input raster in ArcPy?

In ArcGIS 10.3, I am trying to use SetNull to identify streams in a raster based on an existing flow accumulation raster. The process involves setting all raster cells with flow accumulation value of ...
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40 views

Create Cost Surface Raster with slope as percentage of total costs

I know there is a similar question on this website (How to Create Cost Surface Raster for Least Cost Path Analysis?) , but I couldn't find the answer that I'm looking for. I'm currently working with ...