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

learn more… | top users | synonyms

1
vote
0answers
10 views

Adding separate distance files to calculate total distance in ArcGIS

I have two raster files: A raster of distance-to-outlet for a creek. Value = 0 at creek outlet (white), and the maximum value is at the beginning of the creek (black). A raster of Euclidean ...
2
votes
0answers
25 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
votes
1answer
22 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
vote
1answer
29 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 ...
2
votes
1answer
90 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 ...
2
votes
0answers
19 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 ...
0
votes
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
votes
2answers
41 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
votes
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 ...
2
votes
3answers
61 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 ...
0
votes
1answer
14 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
1answer
29 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
votes
1answer
48 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
votes
0answers
31 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 ...
3
votes
1answer
19 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
41 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
vote
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 ...
1
vote
1answer
22 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 ...
1
vote
0answers
31 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= ...
3
votes
2answers
117 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
vote
1answer
49 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
vote
0answers
26 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 ...
-1
votes
1answer
23 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.
0
votes
1answer
15 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?
2
votes
2answers
67 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' ...
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 ...
0
votes
0answers
83 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
vote
0answers
30 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
votes
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 ...
0
votes
2answers
128 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 ...
0
votes
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 ...
0
votes
1answer
48 views

Incorporate treeline in viewshed analysis

I have performed a bare-earth viewshed analysis of a roadway corridor using a DEM, but upon further inspection on Google Streetview, realize that part of the road has dense trees along it. I need to ...
0
votes
1answer
43 views

Zonal Statistics as Table output is missing some polygons ONLY when run from Python script

I have a raster file from which I am attempting to calculate mean values for polygons defined in a shapefile. Using the Zonal Statistics as Table tool from within ArcGIS works great. My shapefile ...
1
vote
2answers
60 views

Viewshed Analysis for bridge polyline observer feature

I am using the Viewshed tool in ArcGIS 10.2 to determine the cells from a DEM that are visible from a highway corridor that has a bridge crossing a river (my observation feature). My question is in ...
0
votes
1answer
139 views

Failed to execute (RastertoPolygon) Syntax error at or near symbol SPACE

I'm converting series of raster to polygon using RastertoPolygon in arcpy. #import the module import arcpy from arcpy.sa import * from arcpy import env arcpy.CheckOutExtension("Spatial") ...
-1
votes
1answer
44 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 ...
2
votes
1answer
105 views

Extract raster value to polygon

I am trying to extract raster values within multiple polygons. It would be nice if I could choose between say the maximum or an average raster value within the polygon. For example, I have created ...
2
votes
1answer
31 views

Why does the use of barrier lines significantly increase idw processing time?

The IDW tool's documentation states that using barrier lines will significantly extend the processing time. It does not explain why this happen. Is anyone able to provide an insight into the inner ...
1
vote
0answers
41 views

Combining information from one raster with another raster

I have two rasters, A and A1. Raster A is the image below that is greenish and has the following attribute table: The table has two fields that I need: Value and class_name Raster A1 is the ...
1
vote
1answer
53 views

Interpolating points conditionally

I have two sets of data. One comprises all home sales in a given area, where each data 'point' is actually a polygon representing the lot that was sold. The other set comprises arrests made in the ...
0
votes
0answers
38 views

Explanation for ArcGIS Cut/Fill tool error

I am curious if anyone has experienced a similar error (and found a solution) when trying to run the Spatial Analyst/3D Analyst CutFill tool? The problem is as follows: When executing the tool on ...
2
votes
1answer
37 views

Sequential rasters - when did point x change

Using ArcGIS 10.1 with Spatial and 3D Analysts, and Python 2.7 I have a series of reclassified rasters in which every cell is either one or zero. I need to programmatically create a single raster ...
0
votes
1answer
53 views

What steps would I take to determine the area amount of soil that needs to be excavated to level an area?

I have contour lines, a raster, and a shapefile of the area that needs to be leveled. I have clipped the contour lines and the raster image to the shapefile of the area that needs to be excavated. I ...
1
vote
0answers
47 views

Zonal statistics (and other tools) will not output all records in ArcGIS for Desktop? [closed]

Using ArcGIS 10.3 for Desktop, whenever I use zonal statistics, only about 90-95% of the records actually show up in the results. The remainders are blank though, if I navigate to that polygon, there ...
0
votes
0answers
81 views

Raster Calculator Addition - missing output. ArcMap 10.2.2

I'm currently undertaking multi-criteria analysis and have 5 raster inputs which I would like to add. I have done this before on a previous project with no issues. When I add the 5 layers, only 4 are ...
1
vote
2answers
52 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
vote
0answers
30 views

Heat Map with species distribution [closed]

what I am trying to do is to generate a heat map depicting the spatial distribution of certain species found in a lake, in association with their sex. For example, species_a+male or species_b+female ...
0
votes
0answers
36 views

Spline tool using arcpy

Trying to use an arcpy script to operate the spline interpolation tool in spatial analyst on point data that represents soil sample points. When background processing is enabled I get an error of ...
1
vote
1answer
40 views

Arcpy - handling intermediate raster files

I have 8,760 (24*365) GRID rasters in a directory. I'd like to use use FocalStatistics analysis to reassign cells to the maximum of a 5x5 window/kernel and extract the resultant values at points ...
1
vote
0answers
15 views

How to classify land cover with MMU 25hac

By using the 30 meter resolution of landsat TM & ETM+ data, I want to create the land use/ land cover map. I have read in several studies to first decide about the minimum mapping unit (MMU) that ...