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

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2
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1answer
40 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 ...
0
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0answers
25 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 ...
0
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1answer
23 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 ...
3
votes
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) ...
0
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0answers
13 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 ...
2
votes
1answer
131 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 = ...
0
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0answers
11 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
votes
1answer
66 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 ...
0
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1answer
57 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 ...
2
votes
1answer
46 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 ...
3
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0answers
70 views

Arcpy code only works when run in two chunks, not as one piece

I have a weird thing happening with my script. When I copy/paste it into the python cmd line within ArcMap, I get error messages. However, if I run the first part, then copy in the very last line by ...
1
vote
1answer
40 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 ...
0
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3answers
86 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 ...
1
vote
1answer
60 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 ...
0
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0answers
24 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 ...
1
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0answers
19 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 ...
0
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0answers
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 ...
1
vote
2answers
46 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 ...
0
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0answers
77 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 ...
2
votes
1answer
108 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 ...
1
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0answers
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 ...
1
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2answers
36 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 ...
0
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2answers
138 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 ...
0
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0answers
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 ...
0
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1answer
43 views

Adding field with prices based on ground use using ArcGIS Spatial Analyst?

I need to calculate the least cost path for a water pipe. The layers I have now are land use, slope, soil type and protected natural parks. Now my teacher has given me the prices of building a water ...
1
vote
1answer
38 views

Calculate elevation change in point feature class [duplicate]

I have a point feature class with 130 rows that represent the vertices of a trail I generated. I calculated the z height for each verticy/row. Now what I want to do is calculate the elevation change ...
2
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0answers
39 views

Watershed tool producing same output as basin tool for all pour points [closed]

I am using the Hydrology Tools in the Spatial Analyst Toolbox (ArcGIS 10.3) I am trying to delineate watersheds in a region in order to do spatial interpolation by top-kriging at some ungaged sites. ...
0
votes
1answer
27 views

Manually changing/suppressing z-values in Spline with Barriers interpolation that are known to be erroneous?

I've included an image of a project I'm working on. There are two layers representing sub-surface geologic formations, and these were generated using elevation borehole data (so, point data), to ...
0
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1answer
41 views

Inserting rectangle in order to surround certain area (few raster cells) using ArcGIS for Desktop?

I´ve done a suitability analysis and now I need to point to this certain area. Is it possible to select and frame certain raster cells to enlighten those? Or can somebody explain how to insert a ...
0
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1answer
20 views

Calculate zonal statistics with two different types of zones (provinces and longitude*latitude grid boxes) in ArcGIS?

I am trying to get zonal statistics in ArcGIS with two different datasets. One is a world map with zones defined as "provinces (such as the US states)" and the other is a temperature dataset with ...
1
vote
2answers
70 views

Getting similar IDW results using Spatial and Geostatistical Analysts for spatial interpolation of data with many zeros?

My data are plant biomass data from hundreds of sites. Most sites have zero biomass; these zeros are real. Thus, my data violate most assumptions of geostatistical interpolation methods (confirmed ...
1
vote
1answer
68 views

Combining information from multiple rasters into aggregate raster and populating fields accordingly

I am stuck on how to best combine the information from multiple rasters into one raster. Specifically, I am working with a time series of raster files, whereby each raster corresponds to a different ...
1
vote
1answer
38 views

Partitioning value (100 tonnes/ha) of underlying shapefile to multiple features in same shapefile in areas that overlap using ArcGIS for Desktop?

I have tried searching for an answer but can't think of a way to generalize my question to other scenarios. Looking for answers using ArcMAP 10.1. I currently have two shapefiles. One contains ...
0
votes
1answer
62 views

Full list of objects not showing up after using Zonal Statistics as Table tool?

I am using the Zonal Statistics as Table tool in ArcMap 10.1 to compute the sum of raster cell values (brown scale in below image) in a given set of polygons (red in below image). For an unknown ...
1
vote
1answer
65 views

Calculating Geometric Mean in Raster calculator

I am calculating Geometric Mean for land degradation mapping. I am applying following formula in ArcGIS 10.2- ("GW.img" * "LULC.img" * "Rain.img" * "Temp.img" * "Wind.img" * "NDVI.img" * "Livestock....
4
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0answers
73 views

Cell Statistics standard deviation values incorrect

I'm having some issues with the Cell Statistics tool in a python script I am writing. I am using 30 years worth of global cumulative annual rainfall data as input and am getting strange values in some ...
0
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0answers
40 views

Trouble shooting Incremental Spatial Autocorrelation/Hot Spot Analysis

I'm trying to do a spatial analysis of rural school closings in Brazil (ultimate objective to do OLS/GWR). I have census data from 2005 and 2014, from which I've calculated the relative percentage of ...
1
vote
1answer
41 views

“Extract by Mask” saving output as temporary file, instead of saving it in specific directory. How to remove this error?

I am using ArcGIS 10.0, while using ExtractByMask in arcpy output file is being stored as a temporary file, though the same file appears in the designated directory but it's status is temporary, which ...
0
votes
1answer
65 views

Con statement in raster calculator Arc GIS 10.3

I have four rasters (A, B, C, D) based on which my classification works. The con statement I have been using is posted below. My problem is when A_01 is 2. Area when A=2, if value of B is less than ...
1
vote
1answer
54 views

Getting 'module' object has no attribute 'ExtractValuesToPoints_sa' error in ArcPy while extracting values to points?

I am using ArcGIS 10. I am trying to extract values to point using ArcPY but getting error as Runtime error : 'module' object has no attribute 'ExtractValuesToPoints_sa' Below is what I am ...
1
vote
1answer
71 views

Script to “extract by mask” a list of raster files and list of mask

I'm new to Python so sorry for maybe trivial question esta, I have four Landsat images and each image with an area to extract by mask. How can I make this script? I've tried with this script doesn't ...
3
votes
0answers
78 views

Get counts in grid cell for multiple values

I have 500+ polygon shapefiles with nationwide coverage. Each shapefile has possible record values of 0-4. I want to get the value that intersects each grid centroid and then get a total count for ...
0
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0answers
20 views

Elevation data from floating point DEM in ArcGIS for Desktop? [duplicate]

I have acquired a DEM from local municipality. It is a float point DEM, and the elevation of each pixel is represented as simply "pixel value". What would be the correct work flow to convert this to ...
0
votes
1answer
48 views

How to prepare Rainfall erosivity map [closed]

I am trying to develop rainfall erosivity map over a study area using 30yrs period rainfall data. i have determined the rainfall erosivity R for each year, how do i use this to prepare a map showing ...
1
vote
2answers
66 views

Extract raster values around point features with kernel

I have a point layer of known landslide locations, and a raster layer (30m) of vegetation cover (categorical). My goal is to extract the prevailing raster value around the point locations. Almost all ...
2
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0answers
28 views

Using “snap pour point” to find a watershed of specific area starting from a point

I am trying to find everything downhill of a certain point in order to create a watershed of a specific area. For example, say I have a point at (x,y), and I'm interested in creating a watershed ...
1
vote
1answer
58 views

ArcGIS Focal Statistics Returns Out-of-Bounds Result

I am trying to compute a moving window maximum on a raster, such that the output is the max within a 5 mile radius. This should result in an output grid where the maximum is equal to the maximum of ...
1
vote
1answer
55 views

Viewshed analysis without observer point?

I want to find the most visible point within an area.. I don't have an observer point, I want to find it. based on the highest points, I've created scenarios and compare.. However there might be an ...
2
votes
1answer
225 views

Doing spatial correlation between two layers on ArcGIS?

I have two datasets and I'm trying to determine the extent of their spatial relationship. I suspect they are closely related but I would like to produce a map output to illustrate this relationship. ...
1
vote
2answers
176 views

Determine rasters particular area's within ranges using python

My directions: Create a script that determines what areas meet the following conditions: Moderate slope — between 5 and 20 degrees Southerly aspect — between 150 and 270 degrees Forested — land ...