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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16 views

Spatial Analyst tools adding extra column of NoData

I've got a script tool in ArcGIS that runs Curvature and Aspect from Spatial Analyst, and the outputs of both contain an extra column. I've attempted to set the extent in the both the tool and the ...
0
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1answer
15 views

Seeking ArcPy equivalents for SPLINE and SETWINDOW commands from ArcInfo Workstation?

I know of a list of conversions between AML and ArcPy. I was wondering if anyone knew of another resource to go between the two? In particular I am looking for a SETWINDOW (AML) function in ArcPy, ...
1
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1answer
24 views

Spatial representation of Data

I'm a new users of spatial analyses packages in R. I have created a SpatialPolygonsDataFrame which contains a number of rectangular polygons that i named "Square1" to "Square64". Until now there is no ...
1
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1answer
86 views

Is there a Highest Position tool in QGIS

I am familiar with the tool Highest Position (Spatial Analyst) in Arcgis, but I am trying to replicate this tools function is QGIS. Is anyone aware if this tool exist in QGIS (possibly under a ...
1
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0answers
17 views

Measuring error of Spatial Analyst interpolation such as spline, nearest neighbor and kriging?

I am planing to use interpolation method using spatial analyst tool and I found several methods like spline NN and kriging. I know I can do interpolation using geostatistical analyst but some ...
1
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1answer
368 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 ...
0
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0answers
15 views

Trend (Spatial Analyst) - Chi-square value

I have to calculate the slope of a line based on a dataset of points with a height value. I am doing this by calculating the slope over a raster created using the trend function (linear 1st order). ...
2
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2answers
36 views

Merge multiple SpatialPolygonDataFrame into 1 SPDF in R (analogue to “Merge” Tool in ArcGIS)

I have created 2 polygons in QGIS. Using them in R, polygons become automatically SpatialPolygonsDataFrame (SPDF). I would like to merge them into single SPDF (as is super easy in ArcGis using Tool ...
0
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2answers
25 views

different calculation results

I spend a comparison of functions of spatial analysis and Oraсle postgresql. There are two tables with the same coordinate system - tech_bridge. oracle query select ...
-1
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1answer
85 views

Field calculator (using ATAN)

How do I input the arc tan in the field calculator given the values of the fields to get the desired answer, I compare the answer of the manually computed arc tan value and the Atan Spatial Analyst ...
0
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1answer
201 views

Topo To Raster executing but not creating the raster

I am using Topo to Raster by File (ArcGIS version 10.1) via arcpy on a large stream and point dataset. Arcpy runs fine and executes without issuing any error message, however it does not create the ...
5
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1answer
305 views

Tabulate Area ArcGIS

I am trying to work out the relationship between the 'processing cell size' and the result from Tabulate Areas. If one uses the same as the raster cell size, and this is the same for both rasters, the ...
1
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1answer
762 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 ...
0
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1answer
13 views

Normalize or standardize map in ArcGIS for a Desktop?

I made a raster using the Euclidian Distance tool. How can I standardize the raster using the fuzzy membership module in arcgis (0 to 255)?
2
votes
3answers
60 views

Combining rasters to calculate total inputs

I am working on creating a map of total chemical inputs into a study area. I have several raster layers of different inputs with values stored in the attribute tables. I am having a hard time ...
1
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2answers
630 views

How to create a raster (topo to raster) with non-rectangular shape?

I'm using Arcmap 10, I need to create a raster from contour lines. These contour lines were clipped out with a certain shape with the purpose to modify them only within that shape and then create the ...
2
votes
1answer
28 views

Calculating slope for points with downhill slopes rendered as negatives in ArcGIS

I have a DEM and a series of points. I'd like to measure the change in slope along the series of points. Distinguishing between uphill and downhill slopes matter to me, and ArcGIS' slope function ...
0
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1answer
45 views

How to quantify the coverage area?

I have a task where I shall quantify AIS coverage in a predefined geographical area. The AIS is a system where automated positional data is sent from ships to base stations. I have AIS data with ...
0
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0answers
30 views

Getting area of natural neighbor interpolation using ArcGIS Spatial Analyst?

My data consists of several points in the field each with xy coordinates and height. I used 'spatial analyst tools -> interpolation -> natural neighbor' to get an interpolation map for the height ...
0
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1answer
150 views

Weighted Overlay - passing parameter as text error?

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 ...
3
votes
1answer
18 views

Problems with Reclassify and RemapRange in ArcPy?

I'm having a bit of trouble with a script that uses ArcPy. I keep getting the following error: ExecuteError: ERROR 000622: Failed to execute (Reclassify). Parameters are not valid. ERROR 000628: ...
2
votes
1answer
39 views

A way to measure whether two variables have similar spatial distributions?

I'm doing a project that's looking at a certain disease outbreak and vaccination in California counties using arcmap. I have aggregated data joins for disease outbreak rate, personal belief ...
1
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1answer
31 views

zonal statistics sum on raster with same values

I was wondering if anyone knows what exactly zonal statistics sum does if all my input value raster have the same values. For e.g. Lets say I have a finer resolution raster with 10 pixel each having ...
2
votes
2answers
2k views

How to find out the Stream Order from DEM

I have DEM Data for the study area, I want to know how to find out the stream order using DEM. I saw Stream order tool in Hydrology toolset in ArcGIS. in Stream order tool what is input stream raster ...
1
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1answer
724 views

Why does CON statement give ERROR 010240: Could not save raster dataset to (value) with output format GRID?

I am receiving the following error when trying to run the following code: import arcpy from arcpy import env from arcpy.sa import * arcpy.CheckOutExtension = "Spatial" env.workspace = ...
1
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1answer
21 views

Properly setting Extents in Arcpy Using path

I am trying to set the extents of my processing using Arcpy, but when my processing is completed, there has been no change to the extents (it results in an extent that did not go as large as I ...
3
votes
2answers
115 views

Estimating Area of farm under cultivation using NDVI?

I have shapefiles for more than 1000 farms. I want to use Hydrological model to model the water balance in these farms. Each farm is devided in to seperate parts . My problem is that the whole ...
1
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0answers
30 views

How to raster clip in outside in ArcMap?

How to raster clip in ArcMap? But I need 1 raster in outside area. Because 2 raster map. Example: Ras1=Temperature.tif Ras2=Error map.tif Clip command input raster=Ras1 Output Extent= ...
2
votes
2answers
535 views

Why does Raster Calculator return GRID ERROR-Unable to open input grid?

I'm calculating Simple Ratio (SR) from NDVI using Raster calculator in Arcgis. Here is expression I wrote in Raster calculator. SR=(1+float[NDVI_apr.tif])/(1-float[NDVI_apr.tif]) But when I ...
1
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1answer
48 views

Getting aspect and reclassifying raster files using Python in a loop

By using Python in PythonWin 2.7.3, I tried to obtain aspect files of a list of raster files in a folder(called database_Dem20) and save it to another folder, database_Dem20/testOutput. In the same ...
1
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0answers
25 views

give importance weighting to sample points in an IDW-interpolation

I am trying to make an IDW-interpolation in arcgis 10.1. In my sample file i have points with the same x,y and z values. According the arcgis-resource-site, the points are considered duplicates and ...
0
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2answers
57 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 ...
-1
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1answer
22 views

ArcGIS elevation? [duplicate]

I would like to get the elevation of different point in the digital elevation model means around 4000 points would any one please tell me how can it be possible.
8
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1answer
310 views

Any rules of thumb for neighborhood settings in Focal Statistics?

In ArcGIS 10, users can define the neighborhood in the Focal statistics tool. The moving window shape can be set to any of the following: Wedge, annulus, circle, rectangle, irregular, and weight. ...
3
votes
1answer
46 views

Spatial autocorrelation analysis (Global Moran`s I) suspicious z-score

I have a doubt concerning the Spatial autocorrelation analysis Global Moran's I, in ArcGIS 10.2. I did the analysis with 3.372 features of a defined study area, and it showed that the features are ...
5
votes
1answer
442 views

Simplifying polygons made from binary rasters using ArcGIS Spatial Analyst?

I'm using MaxEnt to produce a species presence / absence raster layer. It works fine but I have to choose a cut off point for what constitutes presence or absence. As a result I end up with a lot of ...
0
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1answer
14 views

Spatial Analyst interactive tool bar histogram bins

In ArcGIS 10.2, after I have created an histogram from the spatial analyst interactive tool bar, how do I collapse the number of bins to a smaller number?
1
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2answers
49 views

ArcInfo/ArcGIS Server Spatial Analyst not licensed

It might be me but there is something I’m not able to figure out. I created a model in ArcGIS 10 that uses (among the others) “Extract by Mask” and “Zonal Statistics as Table” as functions (therefore ...
-1
votes
1answer
43 views

Using arcpy.gp.Int_sa in ArcMap gives Error 000824: The tool is not licensed?

My Arcpy code is not working in ArcMap 10.1 because an error with the last line: Error 000824: The tool is not licensed. I have all my extensions turned on, so I don't know why I would be getting this ...
6
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1answer
1k views

Comparing extents of rasters using ArcPy?

I am writing a script that takes an input of an Area of Interest (AOI) and then walks through the base directories to find any file that has an extent that intersects with the AOI, clip it and ...
2
votes
2answers
66 views

How to access Spatial Analyst extension from stand alone script?

If I run this script: import arcpy arcpy.AddMessage(arcpy.CheckExtension("Spatial")) from arcpy.sa import Con from arcpy import env fDir=r'd:\scratch\fdir' outFolder=r'd:\aerials\images' ...
1
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1answer
132 views

ERROR 000824 while trying to run IsNull Method outside ArcGIS?

I am trying to perform IsNull function to a raster using PyScripter. This is the code I use: import arcpy import arcinfo InRaster = "C:\\data\InRaster" IsNullRa = "C:\\data\IsNullRa" ...
6
votes
1answer
3k views

ArcGIS ERROR 000824: The tool is not licensed in arcpy

I try to run the Zonal Statistic as a Table through arcpy and it gives me: ERROR 000824: The tool is not licensed. Here is the doc for the function: ...
0
votes
3answers
6k views

How can I add the Spatial Analyst ArcToolBox?

I tried to add the Spatial Analyst ArcToolBox by right click and selecting 'Add Toolbox' but I cannot find in any folder the available toolboxes. They seem that they have disappered. I work with ...
0
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0answers
82 views

Identifying dwellings/homes from imagery using ArcGIS for Desktop?

I have a task where I need to identify dwellings/homes on property lots. The data that I have is an aerial image of the town, cadastre/property boundaries, land tenure information and land-use. I ...
1
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0answers
29 views

Geographic distance from path distance calculation

Is there some way to calculate a geographic distance grid from a path distance output? I'm using arcmap 10.2 and the cost grid is based on land cover and elevation. I can use path distance to ...
0
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2answers
117 views

R Spatial Kernel Density Estimation

I am new on spatial kernel density estimation with r and need some suggestions. Saying, I like to estimate the density for some event occurring at a location, for example, the probability of ...
-3
votes
1answer
363 views

How to calculate cumulative mean in ArcGIS, ERDAS and ENVI? [closed]

I'd like to get cumulative mean value from a multiband image (4 bands). How can I do it in ArcGIS, ERDAS and ENVI?
1
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1answer
189 views

How can I multiply each band of multiband image by separate scalars using ArcGIS Desktop?

I have an image with 5 bands. I need to multiply each band of this image by different scalars one time (I'm lazy to do it one by one) and then get multiband image as a output. For example ...
0
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0answers
23 views

Why are my block neighborhoods not square?

I am running block statistic on a couple of binary rasters. Everything seems to be working fine, but the blocks are not oriented with the rumb lines of my projection. They're tilted about 40 degrees ...