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

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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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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 ...
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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 ...
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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 ...
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1answer
25 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 ...
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30 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 ...
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1answer
43 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 ...
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23 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 ...
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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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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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24 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 ...
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52 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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1answer
63 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 ...
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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 ...
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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 ...
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63 views

Understanding Spatial Join

How do I join .shp files so one layer will contain the amount of overlapped Area from another layer (per HUC as illustrated below)? I'm trying to determine how much Area [POLY_AREA] overlaps the HUC ...
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57 views

Problem with Flow Direction in DEM

I have the following problem with Flow Direction Tool in my DEM and with such wrong calculated flow direction in the centre of DEM I am unable to delineate any watershed. What can I do?
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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 ...
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19 views

Risk Maps - Spatial Analysis

I have created a basic mining subsidence likelihood map which contains the variables of depth and distance from lineament using the weighted overlay tool. From these results I would like to create a ...
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2answers
141 views

Cost Distance Analyst In QGIS?

Are there any tools, plugins or methods in QGIS which allows for an analysis of the best path between two points using least cost path method? As shown below ArcGIS has several distance tools.
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22 views

Spatial Join Layer Derived from Zonal Raster on Original Polygon

I'm trying to do a 1:1 spatial join between polygons created from the zonal max of a slope raster on the original zonal features. The problem is that the jagged edges cause the target features to ...
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32 views

Getting all Google Earth Search Results into a KML for QGIS

This question has been asked by others before but there doesn't seem to have been a response, so maybe someone can help me here. I am using Google Earth to search for business premises in a UK city ...
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1answer
34 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
112 views

Reclassification of raster

Is there a better way to do this? I'm trying to create a script that will change classifications of a raster to: 0 for: 0,7-9,15-20,40,62-63,73,78-87,89-130,132-151,153-175,177-203,215,228,251-253 ...
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42 views

Zonal Statistics As A Table - Missing Features in Results

I have a point shapefile that includes parcel centroid features across a county in Pennsylvania. I am trying to get a sense of the percentage of forest land within half-mile and mile buffers around ...
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37 views

How do I make a constant slope elevation model in arcMap? [duplicate]

I am currently working with ArcMap to develop an elevation model of a quarry showing how the terrain at the quarry site would look post-closure. One of the requirements is that the slopes placed along ...
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1answer
44 views

Euclidean Distance between two lines

I have two lines in ArcMap 10.2.2 and was wondering if it is possible to create a raster showing the Euclidean Distance between them. Like to map each cell on one line to its nearest cell on the other ...
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66 views

How to use the multiprocessing module on python to execute a spatial join?

I have several shapefiles of the entire Amazon rainforest each with millions of polygons (they are fairly detailed and take some time to draw on ArcMap). I need each of these shapefiles to be ...
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2answers
40 views

Distance to, travel only on one surface

Looking to create a distance to wetland raster. However this travel distance must be through the water only. I have tried setting land to a high cost (e.g. 99) however doing so I have to set each ...
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2answers
46 views

Low point density analysis

I'm working on a project for a conservation plan. Part of the plan requires that areas added for conservation have less than one structure per five acres (these are pretty large, mostly undeveloped ...
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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 ...
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2answers
46 views

How does the projection of a dataset affect the results of spatial analysis?

I am planning on conducting a multi-criteria-analysis with a number of different source datasets. A number of the datasets are found in different coordinate systems and projections. Do I need to ...
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1answer
29 views

How to make sense of multi-band global radiation output raster from area solar radiation tool

So I'm running the area solar radiation tool using the time configuration and other parameters as seen here: By selecting the "Create outputs for each interval" checkbox, the global radiation ...
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47 views

How to find a least cost path through several points?

I want to do a least cost path analysis and the least cost path has to go through several different points instead of having just a start and end destination. Is this possible? I am using ArcGIS ...
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1answer
37 views

How to find out the length and friction costs of my least cost path?

I modeled different possibilities for transmission lines with the GIS tool "Cost Path". Now I would like to find out more information about my results. First of all: Where can I see the length of my ...
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2answers
28 views

Aspect Patch Count

I am using ArcMap to create aspect maps. I want to find the how many different directions the land faces (total aspect patch count) with continuous patches greater than three. So for example I want ...
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80 views

Spatial analysis using QGIS or ArcGIS for Desktop?

I am working on the spatial distribution of commercial parking public spaces. I made a database (NUMBER PARKING PLACES, NUMBER OF PARKING MONTHLY), business subjects with adresses with activity. I did ...
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1answer
64 views

Interpolate value at a specific point using kriging

Is it possible to interpolate the specific value at a point using the Kriging tool in the spatial analyst toolbox? If not, then, how can this be done in Arcgis? To my knowledge, Arcgis only produces ...
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39 views

Unusual results with Watershed geoprocessing tool

From the starting point of that I already have a flow direction raster and a pour points feature class, I get different results if I execute the geoprocessing tool Watershed using as input the raster ...
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2answers
71 views

Understanding flow accumulation

I used this youtube video: https://www.youtube.com/watch?v=FSblORbDyhc&list=PLWJ2X2wvq78QRGzl8Un5ADF0_4m5t99iD&index=11 to learn how to run flow accumulation and was successful. I realize it ...
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1answer
58 views

Obtaining ArcView 3.2 Spatial Analysis 1.1?

Is it still possible to obtain and use a copy of the Spatial Analyst 1.1 extension to ArcView 3.2 in order to finish a final project at a University?
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2answers
45 views

SplineWithBarrier (Spatial Analyst) - different results between model builder and external python script

I'm puzzled by different results I get from application of SplineWithBarrier (Spatial Analyst) using Modelbuilder and by external Python scripting: import arcpy points_shp = "pointShape.shp" ...
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82 views

Estimating parameters of a semivariogram?

I have got a shapefile of rain gauges with a field giving the precipitation amount in a particular day. I need to interpolate the precipitation values to obtain a precipitation map for a particular ...