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

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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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1answer
4k views

What does “You do not have necessary license to run tool” mean when ArcGIS extension installed and activated?

I just purchased ArcGIS for Home Use 10.2 and installed and activated the extensions with the codes I received from Esri. The ArcGIS Administrator says Yes for Installed and Authorized, and even has ...
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11 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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32 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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13 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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1answer
56 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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3answers
112 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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25 views

Cell by cell Raster Analysis [closed]

I have five rasters of suitable cropping areas for five crops. I am thinking of doing cell by cell analysis to see if in each cell five crops are suitable or any crop having high cell value should be ...
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33 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 ...
2
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1answer
28 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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1answer
795 views

How to create backlink raster for Cost Distance tool?

I have two polygon shapefiles and one cost surface. I need to estimate accessibility to these two sets of destinations. The part that I don't understand is whether I have to use an output backlink ...
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18 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
14 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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1answer
33 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 ...
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0answers
33 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. ...
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2answers
51 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) ...
2
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1answer
251 views

Weighted Overlay - passing parameter as text error? [closed]

For some reason when hardcoding the save path for the wieghted raster just before runtime it works perfectly. Like such... arcpy.env.cellSize = "90" arcpy.env.workspace = r'G:\Xcel\Route ...
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1answer
993 views

ArcMap 10.1 - Tabulate Area tool “doubling up” for Overlapping Buffer Zones

This question is related to a previous question I asked: Raster Version of Spatial Join (one to many) I used the Tabulate Area tool to crosstabulate values between an overlapping "buffrast" raster ...
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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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80 views

arcpy adding time to Raster Mosiac Footprint

I am trying to create a raster mosiac for use in animating data over time. The current workflow is: Create .gdb (arcpy.CreateFileGDB_management) Create Raster Mosaic ...
2
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1answer
69 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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28 views

Using ArcGIS Spatial Analyst for elevation?

I have many csv files of ~1000 points with elevation and x,y data. These points were manually recorded off of scanned images of the surveyor's drawings at an archaeological site. I have made each of ...
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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 ...
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1answer
1k views

NameError: name 'Con' is not defined

I have 365 rasters with the same extent, and I am trying to sum them together by month. I have the script below, which was working until I added the line out1 = Con(IsNull(raster), 0, raster) which is ...
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1answer
49 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
47 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
227 views

Script Error 'Invalid Pointer' in Spatial Analyst Tool [duplicate]

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 ...
2
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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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2answers
4k views

How to calculate stream order for vector data without a DEM?

I have a shapefile which contains the streams that were digitized from a satellite Image. I would like to calculate the stream order for this data. The data does not exactly match the DEM that I have, ...
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3answers
69 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
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 ...
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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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2answers
301 views

Extracting multiple values of raster to polygons using ArcGIS for Desktop?

I was hoping I could get some help on how to extract information from a land use raster using polygons. I have a layer with 157 polygons and a land use raster with multiple land use categories for the ...
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1answer
46 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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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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18 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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23 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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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 ...
2
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1answer
256 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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2answers
39 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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61 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
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1answer
103 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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2answers
87 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 ...
2
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3answers
1k views

Using Spatial Analyst Geoprocessing functions in ArcObjects?

I'm trying to run some geoprocessing functions in ArcObjects. Some of the tools I want to use are part of the spatial analyst extension. In 9.3.1 it was fairly straightforward to follow the ...
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1answer
536 views

Raster Calculator error

I'm trying to use the Raster Calculator inside ModelBuilder to get rid of null values, but I'm hitting a snag. I'm using the expression: ...
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2answers
32 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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1answer
96 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
2k views

Creating Cost Surface Raster for Least Cost Path Analysis?

I have a DEM raster and would like to carry out a cost path analysis. Among other factors such as slope, proximity rivers etc. I would also like to take elevation into consideration. According to ...
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36 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 ...
3
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0answers
61 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 ...