Questions tagged [kernel-density]

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

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9
votes
4answers
38k views

Measuring area of raster classes?

Are there any tools or methods in ArcMap that can measure the area of each level of the kernel density output? Note this is just a kernel density plot (not a shape file or polygon). Kernel Density ...
5
votes
2answers
887 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?
13
votes
1answer
3k views

Calculating road density in R using kernel density? [closed]

I have a large (~70MB) shapefile of roads and want to convert this to a raster with road density in each cell. Ideally I'd like to do this in R along with GDAL command line tools if necessary. My ...
1
vote
4answers
6k views

R Spatial Kernel Density Estimation

I am new on spatial kernel density estimation with r and need some suggestions. Saying, I like to estimate the density for some event occurring at a location, for example, the probability of ...
5
votes
1answer
551 views

How to use GRASS v.kernel to calculate point densities along a network?

In a road network, I need to select the segments where a minimum of 5 dots occur (1 dot = 1 address) over a distance of 100 m (the image attached illustrates my question). I'm trying to use GRASS v....
4
votes
1answer
1k views

95% contour from kernel density estimates [closed]

I am looking to calculate the 95% volume contour from a kernel density estimate to estimate an animal's home range. Normally, I work in R, but I calculated the "kernel density estimate" in ArcGIS so ...
1
vote
3answers
2k views

Simplifying land cover classification in QGIS?

I have recently completed a land use classification using over 100 ROIs for 5 different land cover classes and it has developed what looks like a highly specific spectral signature for each class. ...
1
vote
0answers
293 views

Showing specific kernel density contours using QGIS Animove?

This is more a graphics question (I calculated all the important stuff in R), but is it possible to edit the Kernel Density Estimation (KDE) output layers given by the Animove plugin to show only the ...
3
votes
1answer
1k 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 ...
2
votes
1answer
173 views

How to explain the spatial relation of forest loss hotspots with several others variables

I am doing a research in categorizing and ordering of the factor affecting/fostering the creation of the forest loss hotspots. I have following data. Point location of forest losses from which i ...
1
vote
3answers
1k views

Calculate employment density using LEHD Census Data in ArcGIS

I have data from the Census Bureau's LEHD files that record number of jobs within blocks groups. I want to convert the number of data in the LEHD into a feature that I can use to calculate block ...
0
votes
1answer
225 views

Automating Isopleths in GME?

Is there an easy way to batch generate isopleths in GME? I have a set of 109 different kernel density estimates that I need to make 50% and 95% isopleths for, but in the interest of saving time and ...