A raster-based operation that spreads point values throughout their neighborhoods.

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27 views

How to output parts of layers (shapefiles) that do not intersect using ModelBuilder?

I have two layers (shape files) that I want to select what do not intersect, to after all make a kernel of it. How do I do that in ModelBuilder without scripting? If someone can help me, even ...
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34 views

Normalization of Kernel Density Estimate rasters in ArcGIS 10

I've been told by several GIS instructors that the pixel values of a Kernel Density Estimate raster output by the point KDE tool in ArcGIS 10.1 represents the probability of encountering a point, not ...
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1answer
63 views

calculate kernel density for polygons in ArcGIS

I have a population data set at the census block level. My goal is to use the data set to identify some population centers in the region based on population density. The simplest way to do it is to ...
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1answer
60 views

How do I stop Kernel Density from cutting off symbology?

I need help configuring Kernel Density so that is does not cut off symbology on hot spots. (See pic below) I'm assuming it has something to do with the extent but I could not get it to display the way ...
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1answer
55 views

95 percent volume contour

I generated, from point data, a kernel density map using GRASS, and I would like to identify the 95% volume contour in it. Is it possible in GRASS? Thank you
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1answer
71 views

Why does connect to Excel spreadsheet through ArcPy give ERROR 000582?

My ultimate goal is to automate kernel density analysis on xy data from a table. I am trying to learn Python but I am very new. I built a simple model to take table data and display xy data. When I ...
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48 views

Why does Kernel Density fail in model with ERROR 000865?

I am attempting to build a model using variables for automation. (see below) The problem I am having is when the model attempts to run the Kernel Density. It seems as if the Kernel Density will not ...
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1answer
149 views

Weighted heatmap analysis- density of points, vs density of weight variable

Was just wondering if anyone could help me with a problem. I'm trying to map wellbeing scores (out of 10), using locations from a survey of 15,000 households, using the HEatmap command in QGIS. It's ...
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31 views

How to calculate x and y variance values?

I'm trying to define the best suitable cell size to use in the kernel density estimation in the Geospatial Modelling Environment (GME) for ArcGIS. To calculate the best suitable cell size the ...
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1answer
225 views

Kernel Density Error in QGIS Processing

I have been getting this error when trying to create kernel density maps using QGIS 2.0.1 and SAGA 2.1.0. It seems to occur only when the extent is large, i.e. the entire state of Texas. If I do it on ...
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162 views

Kernel density estimator - batch

I've unfortunately just found out that Hawth's batch kernel density estimator doesn't work on ArcGIS 10.1. I've installed GME - unfortunately I can't run batches as there's not tool that will do it. I ...
3
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1answer
63 views

How to choose a GRASS kernel density function?

I'm starting to use the Grass module on QGIS, and I want to do a heatmap, so, I'm creating a new surface using the kernel function. But, GRASS come with 7 types of kernel functions, how do I know ...
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1answer
136 views

Why doesn't the Kernel Density Estimate function appear in AniMove plugin?

can anyone tell me why the Kernel Density Estimate function does not appear under my AniMove plugin in QGIS? I can only perform the MCP. I run Windows OS.
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30 views

How does changing the kernel density search radius affect the units expressed in the map legend? [duplicate]

I'm trying to understand how ArcGIS 10.1 handles kernel density values and how these values are reported in the legend. For example, the following parameters were used for the KDEs in the attached ...
2
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0answers
304 views

How to Calculate Utilization Distribution Overlap Index (UDOI) in ArcGIS

I'm interested in calculating the overlap of home ranges (=utilization distributions in my case) of a bird species using sighting coordinates. This article introduced UDOI as the best index for such ...
2
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1answer
1k views

How to display relative concentration (heatmap) of point features in ArcMap?

Please bear with me here - I'm pretty new to GIS, and I'm having a lot of confusion about all the different terms I've seen thrown around. Here's my problem: I have a large dataset of point ...
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245 views

SAGA kernel density error with Sextante Modeler

I can succesfully perform SAGA kernel density analysis with Sextante (1.0.7) in QGIS 1.8.0. But i want to built an automated tool for this job with Sextante Modeler. But i got foolish errors. This ...
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25 views

How to interprete ArcGIS kernel density units when a population parameter is specified? [duplicate]

Possible Duplicate: How to interpret GRASS v.kernel results? The attached image shows trees in a study area based on their actual height in the field. The trees are overlaying a raster ...
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273 views

How to create an error map to support an average kernel density map?

I've created an average kernel density map by running KDEs on points stacked within the same spatial extent. For example, say we have three point shapefiles representing seedlings in three different ...