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

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0
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2answers
41 views

Calculate cells from which the feature would be visible above the skyline (horizon)

I'm trying to work out whether there is a way to do something similar to a ZTV/Visibility analysis but only include the cells from which the point (with 50m OFFSETA/height) would be visible above the ...
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1answer
36 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") ...
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1answer
28 views

Weighted Overlay Decimal Values for Evaluation Scale

I would like to do a weighted overlay of different raster datasets. I would like my evaluation scale to be from 1 to 10 with 0.1 as the incremental value. This way for example a criteria could have ...
0
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0answers
427 views

Tabulate area - Spatial Analyse

I am trying to calculate the amount (sqm) of land cover types (forest, water ect.) in 1045 buffer zones, all the same size (500m in diameter).. The buffer zones are polygons and the land cover is a ...
4
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1answer
268 views

Tabulate Area ArcGIS

I am trying to work out the relationship between the 'processing cell size' and the result from Tabulate Areas. If one uses the same as the raster cell size, and this is the same for both rasters, the ...
5
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1answer
1k views

Creating all possible polyline routes connecting many point locations around polygon obstruction using ArcGIS Desktop?

Lets say I have 30 ports on the west of an island, and 30 on the east, and need to calculate all possible shipping distances between each and every port, with the routes having to steer around the ...
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0answers
19 views

what is the appropriate method to perform spatial and non spatial analysis of survey data travel behavior? [closed]

I'm doing research on the travel behavior of students to the campus. Questionnaire survey data I have collected about socioeconomic characteristics, namely the location of residence, duration of ...
0
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1answer
24 views

When using “arcpy.gp.Int_sa” in Arcmap 10.1, what do I need to import?

My Arcpy code is not working 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 error. It ...
6
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3answers
3k views

Extract raster by mask output does not completely overlap the mask

I have a flow accumulation grid and a shapefile containing catchment areas. Now I want to do some calculations on them so I need to extract data from cells in the raster adjacent to certain catchment ...
7
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3answers
3k views

Extract Overlapping Polygon Data to Points

I have a polygon data set of corn yield collected by a combine. However, as the combine drove through the field, there was slight overlap between passes, leading to overlapping polygons within the ...
1
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1answer
94 views

Near / Near Table creates -1 values

I have two feature classes. Point feature of hand-sampled GPS locations Line feature of terrace walls digitized from aerial photograph. Because of the less than perfect ways I generated these ...
2
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1answer
224 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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2answers
179 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 ...
6
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2answers
257 views

Increasing search radius of nearest neighbors for Nibble tool?

I am working with a raster map vegetation types. I have about 20 types with unique raster code values that can be sorted into three classes: vegetation types I want to expand using the nibble ...
2
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1answer
46 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 ...
1
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1answer
349 views

How to create backlink raster for Cost Distance tool?

I have two polygon shapefiles and one cost surface. I need to estimate accessibility to these two sets of destinations. The part that I don't understand is whether I have to use an output backlink ...
1
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1answer
45 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 ...
2
votes
1answer
26 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
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1answer
722 views

ArcMap 10.1 - Tabulate Area tool “doubling up” for Overlapping Buffer Zones

This question is related to a previous question I asked: Raster Version of Spatial Join (one to many) I used the Tabulate Area tool to crosstabulate values between an overlapping "buffrast" raster ...
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0answers
31 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 ...
0
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1answer
174 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
142 views

Weighted Overlay - passing parameter as text error?

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 ...
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0answers
24 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 ...
3
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0answers
35 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
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1answer
31 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 ...
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3answers
5k views

How can I add the Spatial Analyst ArcToolBox?

I tried to add the Spatial Analyst ArcToolBox by right click and selecting 'Add Toolbox' but I cannot find in any folder the available toolboxes. They seem that they have disappered. I work with ...
0
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1answer
44 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 ...
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0answers
25 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
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0answers
54 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 ...
3
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1answer
336 views

Can ArcGIS handle missing values to create a contour map?

I am trying to create a contour map for a waterbody. It turns out that in several locations there is no data. I just don't want to use the missing values as zero in ArcGIS because it would create ...
1
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2answers
34 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 ...
3
votes
2answers
366 views

How to use Vector Ruggedness Measure (VRM) tool from ArcScripts at latest version of ArcGIS for Desktop?

I need to use the Vector ruggedness measure (VRM) tool available from http://arcscripts.esri.com/details.asp?dbid=15423. However, I am using ArcGIS 10.2 for Desktop and these tools are made for 9.0, ...
3
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1answer
576 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 ...
0
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1answer
368 views

Error while creating a slope [duplicate]

I have a elevation raster (1 arc second) downloaded from USGS site. Before adding it to ArcMap I changed the display units to meters.The projection system for this raster is GCS_1983. When I use the ...
1
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1answer
665 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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0answers
23 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
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2answers
101 views

Multiprocessing with arcpy and Solar Analyst (spatial analyst)

I need help getting multiprocessing to work with the spatial analyst tool - Solar Analyst. I have tested the multiprocessing bit and it works fine. This sample is passing it a file containing 2 lines ...
0
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0answers
28 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
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0answers
12 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 ...
1
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1answer
31 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
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0answers
17 views

Clarification on a previous Utilization Distribution Overlap Index (UDOI) answer

I'm really struggling to calculate the Utilization Distribution Overlap Index (UDOI) and could really use some clarification on a previous answer. There is a comprehensive guide to what i am trying ...
3
votes
1answer
1k 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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0answers
461 views

Raster calculator error 000539 - cannot create weak reference to 'classobj' object

I was - like many times before - trying to clip a raster with the raster calculator (raster * 1 with shapefiles as mask). Now - the following error keeps popping up: ERROR 000539: Error running ...
1
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0answers
33 views

How legitimate is smoothing raster data that has been converted from polygons?

I am interested in applying this methodology to census block data after conversion from a raster: http://rutgerscps.weebly.com/uploads/2/7/3/7/27370595/censusdatasmoothing_brief.pdf Basically, the ...
3
votes
1answer
64 views

Calculate change in canopy height over 10 years?

I want to know how many "tall" trees (greater than 30 m) fell down between 2005 and 2015. I have LIDAR imagery from 2005 and 2015 from an area where many tall trees are known to have fallen due to ...
1
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2answers
412 views

Using ArcGIS API interpolation functions (idw, kriging, splines) in my own dataset?

Does ArcGIS API provide interpolation functions, like if I want to interpolate from my own set of values? I know that ArcGIS provides functions for interpolation like IDW, Spline and Kriging etc, ...
1
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0answers
137 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: ...
2
votes
2answers
911 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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0answers
58 views

Is there PostGIS equivalent to arcpy.sa.Slice() function?

I have an existing system built on an 8.3 PostgreSQL database which uses a ArcGIS - Spatial Analyst for a couple of raster operations. The system is moving to PostgreSQL 9.2 and I'm evaluating if the ...
3
votes
0answers
23 views

Arcmap Combine tool output missing one field [closed]

I have sets of two rasters in Arcmap with identical extents and resolutions, but different values. I previously have used Combine in the Local toolset of Spatial Analyst to create a new raster with ...