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

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2answers
157 views

Using floating point raster image for majority filter in ArcGIS?

I'm trying to do filter images using Majority filter in ArcGIS. My input images is a float point raster image in .img format. There is an error saying "Invalid parameters". What does it mean?
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1answer
401 views

Do I need to run regression in each samples separately?

I'd like to do smooth NDVI image by regression analysis; response of time series NDVI image to Julian date to represent the seasonal changes in NDVI as a function of Julian day. The time series NDVI ...
3
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1answer
1k views

Script to “extract by mask” a list of raster files

I'm trying to mask a group of raster files and save the new rasters in a different folder using the same name of the original files. It doesn't sound as a difficult task, but I'm having trouble ...
-1
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1answer
2k views

How to export raster value into excel or ASCII [duplicate]

I'd like to get all pixel values of time series NDVI image to find regression coefficient to smooth the abnormal NDVI value through the time. So that firstly, I want to export values of raster into ...
0
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1answer
74 views

Is there any method to choose the value of each pixel according to land cover

I have 2 images; one is land cover image (imgA) and monthly mean temperature image (imgB). I'd like to choose value of each pixel from imgB corresponding to imgA. WhaT I expected is each pixel of ...
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0answers
254 views

What does “unsupported bin funcion type” error in ERDAS mean?

I want to open a set of .img files in ERDAS which are output files of zonal statistic function in ARCGIS. Before running the function, all images can be opened in ERDAS. After calculating zonal mean, ...
3
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1answer
707 views

Expand raster extent and set expanded values using nearest neighbor sampling

I have run a hydrodynamic model which has given me a grid of surface elevations throughout a bay. I am trying to process the results in ArcMap (or QGIS if needed). My goal is to take the current grid ...
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0answers
24 views

slope in model different value than slope in stand alone script [duplicate]

When running slope(analysis) from model I receive a high value of somewhere around 71. After then exporting model as python snippet and changing only the output raster name (using same input raster) I ...
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1answer
205 views

How to measure Fracture in area using ArcGIS Cut and Fill?

I want to measure fracture in an area.I know I have to use cut and fill tool. But I wonder how to give input for this tool? it has Input before raster surface and Input after raster surface ! what ...
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1answer
613 views

How to create graph out of two layers using ArcGIS 10.1 for Desktop?

I would like to create a graph of two layers I have. on one hand its the land price of a certain area and on the other a layer with a crime rate. first of all, the layer with the land prices doesnt ...
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1answer
257 views

How to combine Boolean and Fuzzy logic?

So I have a set of 5 Fuzzy Memberships and a polygon feature class, to which I already added a yes/no field. For the final map, I need to combine/overlay all Fuzzy Memberships and the rasterized ...
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3answers
326 views

Calculate Number Of Pixels Visible From Pixel

I am looking for a way in which to take an input DEM and create an output raster whose pixel's value is the count of pixels "visible" from that location. I use ArcGIS with Spatial Analyst, but also ...
2
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1answer
257 views

Weighted Overlay - passing parameter as text error? [closed]

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 Tool\Potter\...
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0answers
42 views

How to modify extent (layer) for Fuzzy Membership analysis?

When applying the Fuzzy Membership, how do I modify the extent (layer) to which it is applied? I don't mean showing the extent, but changing the values (mid point & spread) to a different layer?
1
vote
1answer
406 views

Sample tool in ArcGIS Spatial Analyst not working?

In ArcGIS 10.1 for Desktop I am trying to use the spatial analyst tool 'sample' to extract data from several layers. I have double checked and the input location raster is in the same format and ...
2
votes
1answer
547 views

Extract/Split raster dataset by attribute (OBJECTID)

I have a raster dataset with an attribute table generated from a series of image classification (unsupervised) and processing tools (majority filter + boundary clean). The attribute table shows pixels ...
1
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1answer
149 views

Why does a raster with resolution 5x5m not create a grid with these dimensions? [closed]

I created a 5m x 5m raster using ArcGIS 10.0 Spatial Analyst from a point file. As can be seen in the screenshots of the image and the table, the resulting grid has a higher resoluation than is ...
2
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2answers
2k views

Calculate Slope of Street Segments

Using a DEM, I need to assign slope to individual segments in a street centerline feature class. It will be used to account for increased travel time for steep slopes in a network analysis. I am ...
0
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1answer
65 views

Find Distance within each Raster contiguous cell block

I was asked to find for each Individual Contiguous Forest Block the distances INSIDE of each where it would be the farthest (aka the most isolated) from each forest cell block's respective edges. I ...
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2answers
155 views

How to get neighborhood values count using a geoprocessing tool in ArcGIS?

I have a raster (black=0, red=1, and white=NoData). I am wondering if there is any tool in arcgis which can help me only count number of 0s and 1s separately in a 3*3 neighborhood. I need an attribute ...
4
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1answer
673 views

Do SAS Bridge to Esri and SAS/GIS extensions add value to Spatial Analyst and Spatial Statistics?

My organization uses SAS extensively, but has been increasing GIS use and capacity recently (that's why they hired me). I was asked to evaluate the two SAS GIS extensions Bridge to Esri and SAS/GIS. ...
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0answers
209 views

Error when labelling kriging result (contour) - the input layer is not valid

I've finished kriging, creating a contour-map, representing groundwater-height in my area. By a reason I don't know, it isn't possible to label my results. Neither can I export my data to vectors: ...
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0answers
272 views

QGIS plug-in equivalent of ArcGIS's Spatial Analyst Tools -> Overlay/ Weighted Overlay

Specifically I have 12 .bil raster files that show monthly global mean minimum temperature. I file for each month. I want to combine these to create an ANNUAL global mean minimum temperature. In Arc I ...
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1answer
932 views

how to choose stratified random sample on multispectral image

I'd like to choose random samples from multispectral image according to each Land Cover image. The multiband image has 70 bands representing land surface temperature data from MODIS. Land cover image ...
3
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1answer
914 views

Multiprocessing issues with ArcPy

I am using ArcGIS 'watershed' routine in a script which makes use of multiprocessing. This works fine, but during execution I get the message: Unable to remove directory. Possible causes: 1- Not ...
4
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1answer
235 views

Any way to perform zonal statistics on column other than value or do reclass faster?

I have to perform ArcGIS zonal statistics on a raster, but the column I am interested in is not the 'value' column. Now, I can reclass the raster so that the column of interest becomes the 'value' ...
7
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2answers
3k views

how do you identify ridges on an elevation raster?

I was wondering whether anyone might be able to tell me in layman's terms how to extract or differentiate between ridges and hilltops from 10m elevation data using ArcGIS 10.1?
2
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0answers
328 views

Watershed delineation?

I'd like to delineate the catchments upstream of the sampling points. In order to do that, I have done the following: Burn the rivers into the DEM using ArcHydro>DEM Manipulation>DEM reconditioning;...
0
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1answer
74 views

Add a field to output feature of a geoprocessing tool?

I am running the Watershed tool and RasterToPolygon tool in a loop for a number of points: flowdir = "flow.tif" flowacc = "flowacc.tif" pnts = [arcpy.PointGeometry(arcpy.Point(x=0.0, y=0.0, ID = 12))...
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1answer
50 views

How do you distribute values evenly within zones when converting polygon to raster?

I'm trying to convert a (traffic analysis zone) TAZ polygon to raster so that the population values are evenly distributed within each zone. So far, when converting the TAZ polygon, the same ...
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0answers
223 views

Fill tool creating large output files from sections of a Raster

(This raster information for one of the clipped rasters) I have a raster image representing a landscape that is about 1.3Gb. I clipped the raster into 31 sections which vary in size from 10Mb to 40Mb....
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2answers
178 views

Fill Sinks of multiple rasters in a Python expression

I have 31 rasters that represent different watersheds and I would like to use the Fill (Spatial Analysis) tool to fill the sinks of all rasters at once in Python. All the rasters have the same name ...
1
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1answer
293 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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0answers
798 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 ...
2
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0answers
283 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 ...
0
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1answer
90 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 ...
0
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1answer
378 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 ...
0
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1answer
107 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, ...
1
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1answer
1k 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 ...
3
votes
1answer
2k 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 arcpy....
4
votes
2answers
1k 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) ...
1
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1answer
225 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 ...
0
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1answer
162 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 ...
10
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4answers
2k 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 ...
2
votes
1answer
2k 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 ...
1
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1answer
539 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: Con(IsNull("%temp_ras%"),FocalStatistics("%temp_ras%",...
4
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2answers
336 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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1answer
2k views

Creating Cost Surface Raster for Least Cost Path Analysis?

I have a DEM raster and would like to carry out a cost path analysis. Among other factors such as slope, proximity rivers etc. I would also like to take elevation into consideration. According to ...
0
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1answer
137 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 "...
1
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1answer
259 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 ...