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

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133 views

What is the definition of pt_spacing on Point File Information tool?

I can't find any definition for the outputs of Point File Information tool (3D analyst), specifically the pt_spacing field. Is this the average distance between points, or the average number of ...
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324 views

Watershed delineation; how to program

I've been trying to roll my own watershed delineation program, taking a flow direction grid and pour points as input. I coded up a quick search algorithm in Python which inspects the flow direction ...
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91 views

How to add flow arrows to groundwater table map?

After I had created groundwater table map, I tried using 3D Analyst>Steepest Path to add groundwater flow arrows to the map. However, it didn't work. Would you please let me know how can I add these ...
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51 views

ArcGIS 10.1 Cost Distance Calculations

I have a study area that is a polygon feature class, and am running the Cost Distance Tool on it in ModelBuilder. However, everytime I run the tool, it only calculates a cost distance and cost ...
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114 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 ...
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65 views

Attribute names being truncated during extraction

I have 30-40 raster layers and each raster has approximately 40 columns. The attribute/column names are very long, and the beginning of each column name is the same. During the extraction process, ...
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1answer
196 views

Converting a raster to a polygon

I need to convert a raster into a polygon, and I ran into "Error 000863: Invalid GP Data Type" After searching, I saw this solution online. Basically I needed to convert the float raster to an ...
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1answer
784 views

Why does Raster Calculator (RasterCalculator_sa) give ERROR 000539 in ArcPy?

I am getting a not executed error for a raster calculator. Here is part of the output: File "C:\projectTemp\FloodAnalysis\floodxsectionanalysis.py", line 107, in makeSeemless ...
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2answers
431 views

Flow Accumulation in R

My apologies for such a general question. Is there an ArcGIS like implementation of Flow Accumulation for R? What I am trying to avoid: Using ArcGIS; Using Grass; Using RpyGEO (but will if need be) ...
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160 views

Using Area Solar Radiation tool for many rasters with different latitudes and Z values?

My problem is as follows: I want to count direct radiation for all Europe. As the Area Solar Radiation (ASR) tool allows to work only on small landscapes, I cut my raster-Europe into fragments with ...
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98 views

What extensions are included in ArcGIS 10.2 Basic Version

I wanted to purchase ArcGIS 10.2. i used its trial version for last 2 month. now i am thinking to have Basic version. My work is based on Spatial analysis. so i dont need 3d and business analyst. for ...
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937 views

What Algorithm is used by ArcGIS Watershed tool?

Does anyone know what type of algorithm is used in the ArcGIS Watershed tool (in the Spatial Analyst package)? Very little information given on Esri's website ... but I suspect it may be some kind of ...
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678 views

Only Interpolating within a polygon feature in ArcMap 10.1

I have sample points within a single polygon feature class that I would like to interpolate, likely using kriging. The problem is the sample points and polygon boundaries are many miles apart and ...
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1answer
200 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
176 views

What Spatial Analyst tool to use when comparing competitive species distributions?

A spatial analysis question: I'm trying to compare species distributions and specifically overlap between two species (Water Vole and European Rabbit) that are competitive species. I also want to ...
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65 views

Analysis of positioning polygon on polygon using ArcGIS

This might be a really complex analysis and I'm not entirely sure how possible it is but it is worth a shot. Is it possible to do analysis of positioning between either a "polygon and polygon" or ...
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92 views

ArcGIS: Least-Cost Path between points; Source Destinationissue

I am trying to find the least-cost path between 2 points. The problem I am having is that if I use point A as source and point B as destination, I get a value, but when I do the opposite i.e., use ...
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127 views

How can I choose values from stacked raster images according to location of ROI

Before I choosed ROI on land surface temperature (LST) images and obtained pixel values of LST. Now I need pixel value of another images which are stacked multi-band image. My main purpose is to ...
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62 views

Autocorrelation: Best way to assess mixed uses and building scales?

I am trying to find the best way to measure the spatial distribution and scale of "mixed-uses". i.e. the mix of different building use categories such as residential, commercial, industrial, etc. I am ...
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2answers
214 views

Delineating catchments upstream of flow sites [duplicate]

I have many flow sites and I used them to delineate catchments upstream of each flow site using Spatial Analyst Tools > Hydrology > Watershed. As you know using this tool, you'll get the catchments ...
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384 views

How I can merge three rasters with sum cell

I am working by ArcGIS 10 and I have three raster all of raster have value cell and I want output raster have the sum of pixels values
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62 views

Change slopes derived from DEM

I have a DEM for a region over which I want to simulate an ecological process. I would like to run several simulations for the same region but I want to alter the topography for the simulations. ...
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3answers
111 views

If conditional for multiple raster

I have 12 raster on NDVI. I want to use if conditional statement. Something like this : Con ...
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1answer
522 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
147 views

Can Spatial Analyst extension be used with ArcGIS Server Standard?

I have a model written in ModelBuilder that uses a number of tools in Spatial Analyst extension, e.g. Raster Calculator and Focal Statistics, etc. It runs perfectly with ArcMap. Can I publish it on ...
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57 views

How to create gaussian blur in ArcGIS for Desktop Advanced with Spatial Analyst? [duplicate]

I am trying to create a gaussian blur for a buffer polygon around a border. I have Spatial Analyst and ArcGIS for Desktop Advanced, but am not sure if it is possible. Can anyone suggest a way to ...
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122 views

Calculating rate of spread of tree species

I'm fairly new to GIS and using ArcGIS for a palaeoecology project at university. I have created a map with isolines (all in the same layer using the contour tool) which represent time of arrival of a ...
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230 views

Grid-like lines appearing after using Curvature tool

I have been attempting to use the Spatial Analyst Curvature tool with mixed results. I originally tried to use it with a raster that was projected using a 1983 Teale Albers projection and the results ...
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44 views

Spatial Analyst

does anyone know of some reasources to learn more about Spatial Analyst and raster analysis? I'd like to sharpen up for some job stuff, but I'd like to find some resources to practice on. Thanks.
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26 views

How to Compress/Stack Landscape features to examine spatial distribution and fragmentation?

I was wondering if anyone could help me figure out how to compress landscape information from multiple rasters (or polygons) into a single output. Basically, I want to explore how landscape ...
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1answer
832 views

How do I fill gaps in a raster to zero value cells?

I am trying to add some forest elevations to a DEM using ArcView. I have converted a polygon feature class of a forest into a raster with the same resolution as my DEM. Then I reclassed the forest ...
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186 views

converting vectors to raster (burning streams)

I converted my stream vector to a raster file (using polyline to raster conversion tool). I anticipated that I would get a No Data row in the raster file attribute table, so that I could use a ...
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2answers
206 views

How to calculate the distance of sites to riverways

How do you calculate the distance of about 10 sites scattered across a region to bodies of water (rivers and lakes) using ArcGIS 10.1? I have the lat/lon coordinates of the 10 sites as a point ...
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49 views

How to choose an area (of mxn metres) within a raster that have values above a certain range

I've got a raster of concentrations of iron on Mars and I want to be able to choose several areas of either m by n dimensions in metres, or just any area in m^2, that encapsulate regions that have ...
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401 views

How to make a field “Unique ID field” in ArcGIS?

I need to perform an OLS (Ordinary Least Squares) but ArcGIS asks for a unique ID field. I have a field which would be the right candidate, it's a FIPS number (12 chars), which I have made a number, ...
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1answer
68 views

How to build and pass remap for floating point raster without getting Reclassify ERROR 010255?

I am receiving the following message when executing my python script: ERROR 010255: String remap must be used with a string field. My input raster is floating point and I would like to ...
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1answer
168 views

Partially fill a sink - ArcGIS

I am trying to fill sinks but only to a certain level. For example - if I want to fill them by 5 meters - this means that a sink that is 15 meters deep - will fill only to 10 meters and a sink that ...
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2answers
763 views

Efficient way to handle NA values from analysis in R with Raster

I am not 100% sure if GIS is the correct stackexchange for this, but here we go. A problem I have been bested by: I have a raster layer of approximately 240 million cells. It could be a DEM or ...
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1answer
78 views

Elevation off Road in ArcGIS/Python

i'm using the Modelbuilder in ArcGIS 10.1 to calculate pixels depending on their slope and distance from the road. The third necessary task is to find out, if the pixel is upwards the road or ...
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2answers
419 views

Spatial Analysis - Calculate a cells elevation (height) above the nearest stream cell

I have searched for some ideas on how to formulate this analysis, but have come up short. I imagine there is a pretty straight forward answer; any help would be greatly appreciates. Data: DEM, ...
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87 views

How to choose pixel values according to each land cover class?

I would like to do following steps using two types of images (precpitation and Land cover image): select pixel values of precipitation image within each land cover classes calculate total amount of ...
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2answers
207 views

Troubleshooting why ArcGIS Model works on one PC but not another?

Do you have specific expertise you could share of examples where an ArcGIS Modelbuilder has worked on one PC but not on another? Are there any issues between different Windows versions? There is a ...
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500 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 = ...
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1answer
148 views

Measuring polyline lengths running through a raster - is this possible?

I have a reclassified raster layer with 4 values and a vector layer of polylines. I would like to discover the length of the lines running through each raster value, or the percentage of the lines ...
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315 views

Understanding percentage drop-raster (flow direction-tool)

I'm creating a Topographic Wetness Index using a python script (http://arcscripts.esri.com/details.asp?dbid=16750) As I don't want this just to be a blackbox, I'm trying to understand the different ...
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1answer
633 views

Extract Raster Values by Polyline End Points

I am looking for a way to extract elevations of end points for line data in ArcMap 10.2. I have a road dataset that I want to use as a Network Dataset in Network Analyst. I want to be able to set the ...
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1answer
410 views

PCA on correlation matrix in ArcGIS

I am trying to run a PCA on a set of normalized raster bands within ArcGIS. I would like to calculate the PCA on the correlation, not the covariance, matrix of the PCA, but Arc as far as I can tell ...
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48 views

How to perform euclidean distance analysis with coefficients? [closed]

I would like to perform an euclidean distance analysis in ArcGIS 10 for multi-points which represent seaports. The thing is these facilities have different capabilities for handling and i want to take ...
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1answer
142 views

How to best determine the future location of a Fire Station?

I have been tasked with creating a map and doing some analysis that shows the future growth (10 years) of our county. They would like to see where the future growth is likely to occur and also show ...
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1answer
125 views

Kernel Density output labeling

I have been looking for a way to try and make the output of the Kernel Density function in ArcGIS for Desktop make a little more sense to our administration. I ran the function on a sample dataset ...