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

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1answer
36 views

ArcGIS Viewshed without Observer Points

I want to create a viewshed around a LineFeature. The problem is, I have no observer points. I would like to create them with a gap of 10m around the line feature. The LineFeature should be 1m over ...
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14 views

Kernel Density Analysis using R and ArcGis [duplicate]

I am doing some Kernel Density Estimations, and like everyone elese I face difficulties with setting the bandwidth to create georeferenced rasters. ArcGis (10.1) does it just fine, but it has no ...
4
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1answer
48 views

Arcpy Cell Statistics - maximum number of input rasters

I am running cell statistics in arcpy. Essentially I am summing together a folder of grd files to create a new grd representing their sum This will eventually take place on a folder of 20,000 raster ...
4
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1answer
25 views

Using Spatial Analyst Classification in ArcGIS Engine?

I tend to use ML classification of Spatial Analyst ToolBox in ArcGIS Engine, I wrote this sample code: ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Desktop); IAoInitialize ...
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2answers
52 views

Arithmetic on rasters with variable names in Map Algebra/Spatial Analyst?

I'm a Python (and StackExchange) novice trying to figure out how to perform calculations on temporary rasters with variable names. My attempt at a minimum working example is below, but I would ...
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46 views

Cause of ExecuteError: ERROR 010067 from arcpy.sa.CostPath?

By using the code below that creates least-cost paths between several polygons, I obtain this error message: ExecuteError: ERROR 010067: Error in executing grid expression. Initalization failed ...
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23 views

Error issues when using Cut Fill operation in ArcGis 10.2

I wonder if someone is able to assist with an issue I have about a series of errors I get when using the cut/fill tool in spatial analyst, ArcGis 10.2? Someone posted a question sometime last year ...
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0answers
24 views

how manage mysql spatial polygons in parent child style

I want to store location-polygon data in a parent-child relation. I am using spatial data in MySQL and Google map for polygon. Eg: World 1.1 US 1.2 China 1.3 Japan 1.4 South Africa 1.4.1 Pretoria ...
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3answers
325 views

How to extract surface from air photo avoiding trees and buildings?

I am working with Drone air images. These are geotiff images and clearly portray trees and buildings. I need to first classify the image according to land cover distribution, then need to remove the ...
3
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1answer
58 views

Running focal statistic with iterator in ModelBuilder?

I need to extent the Value of a grid (water mirror elevation) within the nodata area until reaching a specific barrier (the limit of the watershed), in ArcGIS 10.2 for Desktop. I am using this: ...
2
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3answers
68 views

Zonal Statistics as Table Tool

I have a slope dataset. I have a polygon shapefile with territory within the extent of the slope map. I have to calculate the real surface area of this shapefile using the zonal statistics as table ...
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1answer
82 views

Calculating real surface area using Zonal Statistics as Table Tool?

I have a slope dataset. I have a polygon shapefile with territory within the extent of the slope map. how do I calculate the real surface area of this shapefile using the zonal statistics as table ...
1
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1answer
44 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" ...
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0answers
26 views

Calculating average raster values around set of points using ArcGIS for Desktop (or R)? [duplicate]

I have a 30-m elevation raster as well as a set of points that overlay the raster. For each point, I want to calculate the average elevation within a 5-km radius of the point. One way I was ...
2
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0answers
26 views

ArcMap - proportion of polygon in lon/lat grid cells

I have a polygon representing a river basin on a 1 X 1 degree lat/lon grid. I need to create a boundary using the grid cells as the boundary to best represent the outline of the basin. I would like to ...
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0answers
29 views

How to reassign the values of a raster, based on the pixels of the raster beneath it?

In ArcMap 10.2.1, I have two rasters. Raster1 shows the extent of a habitat, and each pixel contains a categorical value for its land cover type (values 1-3). Raster1 has the smaller spatial extent of ...
0
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1answer
34 views

Error with the Contour (Spatial Analyst) tool in ArcGIS

I am having an issue with the Contour (Spatial Analyst) tool in ArcGIS. When I manually run the tool in ArcToolbox, it will sometimes say that the tool has failed, giving the following error message: ...
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17 views

How to Krige with expectation of 0

I am trying to Krige in ArcGIS from point samples of a chemical concentration. Towards the center, most of the points are larger, and on the periphery, all of the points are 0. The generated raster ...
2
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1answer
32 views

strange banding in output raster after weighted overlay

I am trying to conduct a weighted overlay. I have two rasters, one is a continuous slope raster that I reclassified to have 6 classes (8bit signed integer), and one is an elevation raster that I also ...
2
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1answer
126 views

calculating zonal statistics of raster data in multiple overlapping zones and combining them into one table

The aim here is to calculate the max, min, mean, range, sum, count and std of raster data contained in areas delimited by polygons (much like what the Zonal Statistics as a Table tool from Spatial ...
1
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2answers
35 views

Feature Distance for each Raster Cell

I have a polyline layer of roads and a raster of land ownership. For each raster cell I would like to calculate the distance to the nearest road. I am on ArcMap 10.2 with Spatial Analyst and 3D ...
0
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1answer
29 views

Raster data with no values (ArcGIS)

Used a DEM raster and then used the extract-by-mask feature to shrink it to the shp file I'm working with. However, when I try to get unique values, it gives me the following error message: "The ...
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46 views

Choosing appropriate Interpolation Tool

I am interested in doing some fairly simple interpolation work in the next few weeks using ArcGIS 10.1. However, I am unsure about which interpolation tool is most appropriate for the task at hand. ...
3
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1answer
58 views

How can I create a constant slope DEM?

I wanted to create a DEM of constant slope say 1/3000. How can I proceed in ArcGIS 9.3? The area may be 1000m x 1000m or any other as per convenience.
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28 views

Trying to combine 29 zip code service areas into 10 or fewer service areas

I am tasked with coming up with 10 or fewer zip code service areas based on 29 pre-existing zip code service areas. The zip codes cover 5 counties and many service areas, obviously, overlap. The ...
2
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1answer
81 views

Obtaining average value around polygon in raster for different cross sections?

I have elevation data in a raster, river (blue line) and the flooded area (black polygon) as shown in the image below: I want to find the water depth in the flooded area (inside the black polygon). ...
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1answer
46 views

Why is my spatial join count 0 in ArcGIS Desktop?

In arcMap, I have a list of locations with lat/long. From a previous post, I learned about the Spatial Join tool to determine the amount of joins that I have. I tried to use the tool with my states ...
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58 views

What is GDAL equivalent to ArcGIS Lookup (Spatial Analyst) tool?

I use the Lookup (Spatial Analyst) tool to create several raster layers from a combined raster layer. I know ArcPy can do the same thing. However, I would like to know whether GDAL (or another ...
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81 views

How to extract NetCDF raster values to time enabled shapefiles?

Does anyone know a good way to extract NetCDF raster values to each data point from a time enabled shapefile at the correct time? I have tried using a python script tool and a loop that steps ...
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1answer
101 views

Extracting NetCDF raster values to time enabled shapefiles - what's wrong with my python script?

I'm trying to make a python script tool that extracts the values from a NetCDF raster to each data point from a time enabled shapefile at the correct time. My NetCDF raster consists of monthly sea ...
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2answers
46 views

Compare slopes between adjoining line segments

Using a DEM, I assigned slope values to individual segments in a street network feature class. In some areas the slope values seem suspect, such as where a highway overpasses a local road. Is there a ...
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2answers
103 views

Using Spatial Analyst Sample tool

I have a bunch of rasters and a point file. I need the information from ll the raster files to be added to my points. My usual workflow is to use the Spatial Analyst sample tool. It works fine and ...
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1answer
27 views

Contouring surface with barriers?

I'm using ArcGIS Desktop 9.3, and I want to contour a surface with barriers. Every time the result is a polyline contour shape file which covers only a part of the surface not the whole surface. ...
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2answers
46 views

How do I create zones using location features? [closed]

I have a list of rock art sites with a recording of every image within each site. For example, Site 1 has 4 kudu, 1 lion, 3 males and a locust; Site 2 has 2 leopards, 1 elephant and 3 giraffes; Site 3 ...
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0answers
25 views

ExtractByMask with one mask and multiple layers ArcMap

I have a multiple cost distance rasters and multiple feature layers. I need to find and join the feature layers (or associated shapefiles) that lie within a threshold of costs on the cost rasters. For ...
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1answer
31 views

Aggregate the raster from the Combine Tool in Spatial Analyst--->Local

I have a raster file created through the Combine tool (Spatial Analyst--->Local). The attribute table is showed below. Its resolution is roughly 10m. I would like to aggregate it to 50m with each ...
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2answers
82 views

Open source, Python option for Arcpy's Con tool?

I'm wondering if there is a method to perform a function similar to Arc's Con tool, using open source options in python. I have two rasters, one that shows locations of clouds and the other is just a ...
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2answers
76 views

Identifying clusters of points within a given distance

So I have a database of lats/longs representing incidents occurring on or near roadways. My goal is to identify the street block areas with the highest number of incidents in the database. I don't ...
0
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1answer
41 views

Z values all equal 0

I have just posted a similar question, but I solved part of it, however it has now lead to a new problem. I have a point layer, and have got the x,y and z coordinates from 'extract values to ...
3
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1answer
35 views

Can't save result of “Extract Values to Points (Spatial Analyst)” inside the working feature dataset!

I have a file geodatabase in which I have a feature dataset. I have some feature classes inside the feature dataset. I wonder why when I attempt to save the result of Extract Values to Points (Spatial ...
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0answers
29 views

Errors while running Region Group tool

I am getting an error while using Region Group on a large dataset. The errors are specified below: ERROR 999999: Error executing function. The table was not found. [VAT_final002] A column was ...
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2answers
184 views

AttributeError: 'int' object has no attribute 'save'

I am trying to use a conditional statement to generate a raster with binary values from a raster with probability values (floating point raster). This is easily done within ArcMap by batching the ...
1
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1answer
62 views

Need to calculate values for a cell based on surrounding landscape

I have a raster file with the urban development of a county mapped out (values: 1=urban 0=not urban). I also have a raster file with several blocks of forested land, each block of land has its own ...
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2answers
56 views

Avoid NoData after Focal Statistics Majority

I am currently working with some classified land cover rasters (containing 8 land cover classes) in ArcGIS 10.0. I would like to make them look smoother and have therefore used the Focal Statistics ...
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0answers
27 views

Using GDAL and Python to replace the Spatial Analyst TabulateArea method

Has anyone tried to phase out the use of ESRI's Spatial Analyst extension by replacing it with GDAL in Python? I have a script that only uses the TabulateArea and Statistics analysis but not much else ...
1
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1answer
29 views

How can I calculate the nearest distance to a landscape element taking the direction into account (i.e. slope direction, prevailing winds)?

I am trying to build a layer of distance to relevant landscape elements in a watershed. To be relevant, a landscape element must be downstream with respect to the runoff direction.  Clearly, I want ...
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2answers
57 views

Cell Size parameter for IDW (Spatial Analyst) tool

I am attempting to use the IDW (Spatial Analyst) tool in a Python script however I am a bit confused on what to put for the "Cell Size" optional parameter. When using the tool within ArcMap it seems ...
1
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1answer
64 views

Habitat fragmentation tool error

I am trying to calculate the habitat fragmentation of a forested region in Africa in order to protect the areas less fragmented. I have used the tool "Landscape Fragmentation Tool V2 requiring Spatial ...
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2answers
94 views

ArcGIS 10.1 calculating area out of Aspects

I have used the aspect tool to visualize the 8(+ Flat) slopes of the different directions, now I would like to get the numbers of the areas for each different direction (+Flat). Anybody knows how that ...
3
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1answer
209 views

Is Clip (Data management) or Extract By Mask (Spatial Analyst) more efficient?

I'm trying to clip down an Orthophoto to a county boundary. I've been using the Extract By Mask Tool, but this process has been running for about 12 hours! It's gone through 2 cycles already, so I'm ...