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

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5
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1answer
96 views

Creating forest patches from land cover layer?

I have a land cover layer from which I've extracted the tree canopy class and set all values that are not tree to NULL. I've also converted it to a vector and exploded it to make single part features. ...
2
votes
1answer
151 views

Reclassify on land cover raster won't work

I'm new to GIS so I apologize if this question is basic but I couldn't find my answer online. I'm trying to reclassify a land cover raster from the National Land Cover Database. I want to reclassify ...
3
votes
1answer
147 views

Flow direction and catchment area polygons for utility water pipes

I'm working on a project where I need to show which direction the water would flow from a water pipe in case there is a pipe burst. I also need to show catchment polygons(area affected). This was ...
1
vote
0answers
51 views

Determining Euclidean Distance in Polygon using ArcGIS for Desktop?

I would like to ask about how to create an euclidean distance analysis from a polygon shapefile. I got a geology shapefile in which I want to create a "distance from geological boundary" analysis. ...
0
votes
0answers
29 views

Accessing Spatial Analysis in ArcGIS Online?

I have an ArcGIS Online Organization account but when I click the down arrow next to a layer I do not see the spatial analysis option. How do I get to the spatial analysis? I have watched Esris ...
2
votes
1answer
67 views

How to find local maximum using arcgis

I would like to find local maximum with the moving window 3x3 of a raster image but I don't know how to do this. Could you please suggest me the way to do this?
-1
votes
1answer
142 views

Calculating average NDVI

I would like to calculate average NDVI values. I have 3 values of NDVI: high:243 low:0 high:243 low:0 high:238 low:0 How can I use a a raster calculator to calculate the average valvue
3
votes
0answers
95 views

How to display the slopes that only facing west using ArcGIS for Desktop?

Here is what I am struggling with ... In ArcGIS for Desktop I have to Derive and symbolise areas considered susceptible to avalanche risk based on the following simple rules: areas with a slope ...
2
votes
2answers
89 views

How to calculate percentage of selected area from DEM?

I am working with elevation data and performed a local operation to convert it from meters to feet. I am interested in finding the area (expressed in percentage) that is above 4000 ft, but I have ...
0
votes
2answers
33 views

Creating new raster based on spatial extent and classes of one raster and average of another using ArcMap?

I have a raster that is split into classes and I wanted to make a new raster with this raster's spatial extent and classes but displaying the average values from a different raster. I am not really ...
1
vote
0answers
113 views

How to perform a weighted overlay analysis with categorical classed data?

I have several land use layers (vector polygons) that all contain a field about land use in different classification systems and would like to combine them to a single classification. I would like to ...
0
votes
0answers
49 views

How to minimize output raster errors using topo to raster tool

TLDR:Is there a way to specify an angle of rotation for an interpolation output based on the angle of input lines? In our line of work, we often create straight line contours that represent a sloping ...
0
votes
1answer
137 views

How to calculate average NDVI values for buffers in ArcGIS?

I would need to calculate an average NDVI value for each buffer among everal hundred buffer-areas. The buffer areas are built around observation points. I have all buffer areas in one .shp file and ...
0
votes
2answers
123 views

ArcMap Zonal Statistics not producing attribute table

I'm using the zonal statistics in spatial analyst ArcMap 10.2. The input zone is a feature (conterminous US states) and the raster (.tiff - signed integer) is biomass for the entire conterminous US. ...
4
votes
1answer
158 views

Finding maximum radius of circle within irregular polygon without using ArcGIS Spatial Analyst?

I have a problem which I think could be handled by using the toolset "zonal" / zonal geometry in the ArcGIS Spatial Analyst toolbox. However, I do not have a license for Spatial Analyst, so I am ...
1
vote
1answer
53 views

Conversion problem with 'Feature to Raster': resulting Raster not visible in ArcMap

I want to convert a Shapefile consisting of numerous point-features that each represent a specific height in my DEM to GRID-format so that i can then analyze it with Spatial Analyst. Mysteriously, ...
1
vote
1answer
48 views

Creating a raster based on a where clause

I am writing a script that deals with a raster that will need a subset of the raster outputted and the rest of the original raster needs to be "no data". To clarify, say, there is a raster and ...
3
votes
0answers
29 views

Need to run a Groundwater Analysis Based on Points to a Raster

The title sounds daunting, but this task really isn't. I have well samples over a decade in certain locations through an area. These samples contain a value of that element at that point in time. I ...
3
votes
2answers
119 views

Stitch Bathymetry and DEM data together in ArcMap

I have a question and I would appreciate it if anyone can help me. I have a DEM built from Lidar data and bathymetry survey points for a river which flows on the DEM surface. As you know, Lidar ...
1
vote
0answers
77 views

ArcGIS Solar Radiation tool says output global radiation raster empty?

I am using ArcGIS 10 with windows7 64 bit on core i7 processor I am working with ArcMap 10 solar radiation tool to create the area solar radiation map. Every time I run the tool it stops after some ...
3
votes
0answers
47 views

Elevation interpolation along a (sewer) line

Here's what I want to do. I have a vector sewer line feature class that contaings a field for the high invert elevation and one for the low invert elevation. I can turn them into a raster no problem ...
0
votes
0answers
24 views

Update Raster extent

How do you update raster's extent after you export the raster ? I forgot to enable the Date Frame rather than it's original Dataset ? Thanks.
3
votes
1answer
40 views

Fast editing in raster calculator — adding lots of images together

I need to add pictures together to make one raster. In one session there are about 150 - 200 images (named randomly - see syntax example) There are about 50 sessions (named randomly) Is there any ...
4
votes
3answers
232 views

General steps to create watershed boundary

I am a very beginner of ArcGIS. I got this CD of GIS files of a city and intend to work on watershed management. There are different file names in different formats on CD. Like .shp, .shx, .dbf, ...
5
votes
1answer
79 views

What special values can be included in the Con tool's conditional statement?

I recently read an answer to this question, which used a rather creative solution involving ArcGIS's Raster Calculator. The part that I was most interested in was that the solution's conditional ...
0
votes
1answer
39 views

How do I define 'KrigingModelOrdinary'

How and where do I define the KrigingModelOrdinary Here is the code: rasterKrig = "run{}_Krig_{}".format(counter, field) outKrig = arcpy.sa.Kriging(Stations2010o3Data__2_, field, ...
4
votes
3answers
399 views

Converting raster file from float to integer type in ArcGIS for Desktop?

I have a float type raster file (an NDVI made from ERDAS IMAGINE) and would like to convert it to an interger type raster file in order to use Focal Statistics function (Majority). Is there any way to ...
2
votes
0answers
103 views

Merge Raster Layers with Raster Calculator

I am looking to merge three raster layers together, we are only allowed to use the Raster Calculator tool in Spatial Analyst, ArcToolBox. Using ArcMap 10.2
3
votes
1answer
37 views

How many A features that fall both in the B polygons and C polygons are for each C polygon?

I have this apparently complex problem for solving in ArcGIS: Practically, I need to get the number of all yellow polygons that fall within both the green polygons and the red polygons. I need this ...
4
votes
1answer
245 views

Question about ArcGIS vs. QGIS for kernel density estimations

It appears from the QGIS documentation that the Heatmap Plugin can generate a kernel density surface from a point map and make use of the attributes of the original points to influence this surface ...
7
votes
2answers
229 views

What is the Pick tool in ArcGIS's Spatial Analyst commonly used for?

I have recently encountered the Pick tool in the Spatial Analyst of ArcGIS. I understand what the tool does; it creates an output raster using a list of input rasters and a 'position' raster which ...
3
votes
1answer
404 views

Calculating NDVI using Landsat ETM+ band values

I have sample points (shape file converted from a .xls file which contains XY coordinates,nnx,nny and canopy density) and a landsat etm+ image. First I applied 'SpatialAnalyst Tools>Extraction ...
3
votes
0answers
26 views

3D distance and topography

I have a set of points and want to find out the nearest distance to a water body (poly lines) taking into account the terrain and get a surface distance calculation. I understand that the way is to ...
2
votes
2answers
168 views

How to use OR in a CON statement, in the ArcGIS Raster Calculator?

I'm trying to compare two rasters, and create an output based on a formula like: if raster1 > 10 or raster2 < 20 then raster3 = 30 How can I specify the OR in the raster calculator's CON ...
2
votes
0answers
25 views

Characterizing territory according to its relief using ArcGIS Desktop?

I want to characterize the territory according to its relief with ArcGis 10. I'm trying to define a wide territory by its relief, but I would like to do it in an automatic or semiautomatic form with ...
0
votes
3answers
209 views

Capabilities of the Analytical Hierarchy Process (AHP) in conjunction with the weighted overlay tool

I am making a prospective map of fossil deposits using the "Weighted Overlay" ArcGIS tool. Input factor rasters are mostly topographic in nature (elevation, roughness, TPI, etc). Initially, I had ...
2
votes
0answers
97 views

Comparing two kernel density rasters for areas of interest?

The background to my question is that I have unit sales for Product A aggregated by city. I also have unit sales for Category A aggregated by city. The goal is to compare areas where Product A ...
2
votes
0answers
64 views

Spatial Autocorrelation tool vs. Incremental Spatial Autocorrelation

When you run the Spatial Autocorrelation (Monrans I) tool, you have the option of setting 'Conceptualization of Spatial Relationships'. This option isn't available for the Incremental Spatial ...
0
votes
1answer
112 views

Calculating area of solar radiation using ArcGIS for Desktop?

How can I obtain area solar radiation using ArcGIS for Desktop? I am open to any kind of suggestion as I want to give it a try.
1
vote
1answer
203 views

ArcGIS Raster Calculator output raster has one band but cannot build attribute table?

I built a raster using the raster calculator of ArcGIS 10.1 for Desktop. The properties of the output raster ("usle_1") indicate that this raster has one band. There is no attribute table but I ...
4
votes
1answer
46 views

Zonal statistics discrepency between Arc 10 versions

I've discovered a weird phenomenon using zonal statistics with a colleague at another office. We are attempting to use the Zonal Statistics as Table tool to sum the value of raster cells within ...
1
vote
2answers
44 views

Get raster expression

In Arcmap I have made a new raster with ArcToolBox -> Spatial Analyst Tools -> Map Algebra -> raster calculator. Now, months later, I have forgotten the source formula expression. How can I ...
1
vote
1answer
139 views

How to process GeoJSON data and create hive table for spatial analysis

I am using the ESRI-GIS tool for hadoop for analyzing json data generated through ESRI products like ArcGIS. But I wanted to analyze spatial data from a PostGIS table for which I made geojson ...
1
vote
1answer
220 views

How to create the attribute table for a raster that was produced by the Slope Tool (ArcGIS10)?

I use the Slope Tool (Spatial Analyst Tool – Surface) of ArcGIS10 by ASTER GDEM (that was exported to UTM projection). The program produce new raster (with slope value), but the resulting raster ...
-1
votes
1answer
34 views

How to create a buffer from a click on map on ARCMap

I'm searching a way to creating a buffer of a specified radius starting froma a click on the map.
1
vote
2answers
74 views

Why does arcpy.sa.Sample give TypeError: Sample() takes at least 3 arguments (3 given)?

I'm building a script where I'm taking a standardized CSV that one of our data processing packages consistently exports and turns it into a z-aware shp after running through Sample as well. Along the ...
3
votes
0answers
113 views

Cost Path: multiple pairs of sources and destinations

I have seen many questions related to this problem but very few answers. I am very new to scripting and using ModelBuilder, but I am trying to calculate the cost path for 200 polygons with a single ...
2
votes
1answer
45 views

Raster statistics along polygon edges

I would like to summarize raster statistics along the edge of each parcel/polygon in a shapefile. For each parcel shown below in yellow, I would like to calculate the average, min and max value of ...
0
votes
1answer
419 views

Combining two overlapping rasters (combine cells, retain both values) using ArcGIS for Desktop?

Using ArcGIS 10.2, I am trying to combine two rasters which are identically overlapping in shape and extent, but with different values and counts. As an end result I would like each cell to retain ...
0
votes
3answers
75 views

Error in Conditional Tool of ArcGIS for Desktop?

I am trying to extract stream raster from a flow accumulation raster using Conditional Tool in Spatial Analyst. Here's my input: Input Raster: FLOWACC.tif Expression: Value >= 3.5 True Raster: 1 ...