Questions tagged [kernel-density]
A raster-based operation that spreads point values throughout their neighborhoods.
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12 views
Kernel Density Percentage Isopleth
I have generated Kernel Density Rasters from GPS species locations. I want to generate percentage isopleth polygons to enable me to identify core areas. I am using ArcMap10.6 and therefore cannot use ...
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0answers
24 views
Average Kernel Density as Dependent Variable in Regression
I have point pattern dataset and I estimated a kernel surface from it. I want to use a census tracts average kernel density as a dependent variable in regression analysis. Is OLS appropriate or should ...
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28 views
QGIS KDE (Heatmap) TIF file --> Open in ArcGIS in order to use Kernel Interpolation With Barriers
So I've created KDE .tif files in QGIS, but there are currently no plugins available in QGIS, which takes into account barriers when creating KDE density rasters for species.
I can bring the .tif ...
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0answers
8 views
Getting rid of colored background when using point density tool
When running the point density tool in ArcMap in the layer created there is a colored background covering a specific area. Is there a way to get rid of this?
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1answer
28 views
Calculate the class limits from the kernel density depending on the percentage of the source dataset
My goal is to make the class boundary of a kernel density dependent on a percentage of the input points.
Specifically I calculate the kernel density from 3000 points in a 50m x 50 m grid with a search ...
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1answer
48 views
Interpret a kernel density map for pollutants
I currently have a grid of values (concentration in ug/m^3) for a certain pollutant. I then converted each grid to a point to use as an input to the Kernel density analysis tool in ArcGIS pro.
The ...
4
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1answer
82 views
Postgis/Postgresql - Interpolate equadistant points based on weighted attribution similar to QGIS Interpolation(Heatmap Kernal Density Estimation)
I have equadistant vector points, that are all 400m apart but only cover certain areas of a map that have a value of (1-5). In QGIS I can run the Kernel Density Estimation with my vector points to ...
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32 views
Why do my kernel home range areas differ in size?
I'm comparing the amt and adehabitatHR packages to use for estimating home ranges for GPS tracked animals.
If I calculate the home ranges using an MCP they are identical but if I use KDE they differ ...
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22 views
Kernel density radius struggles
I have some line data (boat tracks) that represent all boat movements (24/7) for 30 days. From this dataset, I also got those fishing lines that represent actual fishing activity. So, I have 2 ...
3
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2answers
258 views
Choosing kernel density radius [closed]
I have 3 datasets with GPS points. Two of those are GPS points that represent boating activities (two different types) and the third represents turtle observations. I would like to perform Kernel ...
0
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1answer
52 views
Choosing tool to create raster with probability of occurence on each cell using ArcGIS Desktop?
I have two different datasets: 1) seal occurence (point data)
2) fishing boat tracks (line data)
First, I need to create two density maps, i.e. one for each dataset. ...
2
votes
1answer
520 views
Plotting density map of points?
I have some points and I would like to plot the density map of them.
I have tried like this:
plt.figure()
xedges = np.linspace(540000, 550000, 20)
yedges = np.linspace(5200000, 5500000, 20)
H, ...
2
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0answers
67 views
Making informative legend for Kernel Density Estimate in QGIS?
I have used heatmap (kernel density estimation) in QGIS 3.0.1 to make a heatmap of boat counts.
In my point data-each point is one boat.
Then, in my kernel, I have used a 500m radius, with 500m pixel ...
2
votes
1answer
2k views
Plotting a heat map onto background in python using kde?
I have a geodataframe with points within the united states. Each point has a geometry attribute as well as a value. I would like to plot a heat map based on these values on top the map of the united ...
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0answers
124 views
Kernel Density Estimate on point data in degrees (scikit-learn)
I am estimating point density, where I am having point coordinates in degrees, I need a raster(over the extent of these points) which provides a density estimation on each cell.
I have tried on R but ...
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0answers
38 views
Created heatmaps are not displayed
I created a few heatmaps based on 2 different shapefiles( point layers). Then I joined the data from the 2 shp files, the joined file looks perfectly fine. I created a view heatmaps based on the new ...
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0answers
43 views
Using kernel density estimates as attributes for point data? [closed]
I have spatial point data (say addresses of all inhabitants of a metropolitan area or larger region) with context data for each point like age, gender, employment status, and so on.
For each spatial ...
0
votes
1answer
216 views
Performing Weighted Overlay using vector data with no inherent values in ArcGIS Desktop? [closed]
I have been asked to do a weighted suitability analysis using all vector based polygon feature layers (8 different layers). Each layer has been ranked from 1 to 8 in order of importance.
My problem ...
2
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2answers
97 views
Tools to conduct Kernel Network Density estimation in an ESRI environment
Are there any tools or resources to conduct Network Density Estimation using ArcGIS 10.5 or ArcGIS Pro?
I've found this tool http://sanet.csis.u-tokyo.ac.jp/ but it only works on version 9 - 10.2.
5
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0answers
573 views
Why do the Heat Map (QGIS) and Kernel density estimation (SAGA) tools provide different results?
The Heat Map tool (QGIS) and the Kernel Density Estimation tool (SAGA) provide different results for the same data as shown below.
Why is this happening?
Is one of them more conceptually correct?
...
1
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1answer
33 views
Calculating Kernel Density within defined region?
I am attempting to calculate a Kernel density raster dataset from a point dataset within a defined regional boundary. However the output dataset generated is in a large square that cuts off one of the ...
0
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1answer
58 views
How to fix this Heatmap script from failing SQL expression (integer/string?) using arcpy (ArcMap 10.5)?
I have a heatmap script that will eventually print 10 PDF maps. At the moment it is failing at the SQL expression in the Make Feature Layer right before Kernel Density Raster creation because the ...
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0answers
79 views
Unique values from Kernel Density
I have calculated Kernel Density for feature class "fc" using following code:
dens = KernelDensity(fc,"NONE", 1, SearchRadius, "SQUARE_METERS", "DENSITIES", "PLANAR")
The raster attribute table:
I ...
0
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0answers
491 views
Estimate spatial kernel density from raster and output kernel values in a grid
I would like to use a raster map (find below) to estimate or create a kernel density distribution. The objective is to extrapolate the kernel density function and re-use it in order to distribute a ...
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0answers
52 views
Modelling habitat heterogeneity in space: R function
I'm working on spatial landscape simulations and I would like to simulate a landscape where habitat quality varies in space.
I did already some simulations assuming a landscape with higher habitat ...
2
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0answers
388 views
Choosing bandwidth and scaling factor for Kernel Density Estimate in ArcGIS Desktop?
I have some points that represent animal locations over the course of a few months at the scale of ~20 sqkm. I am emulating the work of previous researchers in this field, but I'm having trouble ...
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vote
2answers
659 views
Making 95% Volume Contour on ArcMap without Hawth's Tools or GME?
I have some points that represent animal locations over the course of a few months. I am emulating the work of previous researchers in this field. I'm still new to GIS, so I previously thought that I ...
0
votes
1answer
59 views
Site density related to river vicinity
I use ArcGIS 10.1. I have a shapefile with sites and another with the rivers of the area.
I would like to calculate the density of the sites related to the river vicinity. Is it possible? Which type ...
0
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0answers
131 views
From Kernel Density to a polygon that covers 80 % of points
I have a set of occurrences as points in a district. I used Kernel Density tool, to show the areas of various densities. I also want to create one polygon that covers X % of points. I've tried the ...
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0answers
300 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 ...
-2
votes
2answers
128 views
Kernel density tool does not produce an .asc output file
I have made a kernel density map in ArcGIS 10.3 and 10.5, but the output appears as an .aux file, not an .asc file (which I will need to use for occurrenceThinner). A folder appears also with a ...
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1answer
740 views
Determining search radius used in Kernel Density analysis?
When conducting kernel density analysis in ArcGIS (10.2) if you leave the search radius field blank I realise it uses a default based on an algorithm.
Is there any easy/quick way to find out what ...
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 ...
0
votes
1answer
71 views
ArcPy: Kernel Density Extend (Default + 5000 Meters)
I in my Kernel Density Loop i want the Processing Extend to be
Default + 5000m
Does anyone know how this might be done?
This is the Code:
import arcpy,os
from arcpy import env
from arcpy.sa import *...
0
votes
2answers
540 views
Problem with Search Radius (Bandwidth) of Kernel Density Estimate
My task is to do a Kernel Density estimation with a cell size of 500m and a search radius (bandwidth) of 500m.
The search radius doesn´t seem to work though.
These are the settings:
This is the ...
1
vote
1answer
150 views
Saving output in ArcPy?
The loop runs once, then i get this error message.
Runtime error Traceback (most recent call last): File "<string>", line 17, in <module> File "c:\program files (x86)\arcgis\...
2
votes
2answers
2k views
How to run for loop with unique values
Instead of two shapefiles that are saved in fcList in this loop I would like to do KernelDensity on the unique values of one shapefile.
Does anyone have an idea how this might work?
import arcpy,os
...
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0answers
49 views
Correcting for correlation of kernel density of events to that of their distance from separate feature using ArcGIS Desktop?
I have a kernel density raster of recorded events. These events are correlated to their distance from a linear feature. In other words, density is higher near this line because it is a 'starting point'...
1
vote
2answers
342 views
Saving output in ArcPy For-Loop?
How can I save the output of my For loop so that I have a different output name each time?
This is the code I´m using:
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = r'C:\...
0
votes
1answer
295 views
Kernel Density with quantity values in bands
I have very limited knowledge of ArcMap.
I am trying to use a density heat map to portray the number of incidents in an area. I have used the Kernel Density tool in ArcMap 10.1. However, instead of ...
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0answers
37 views
How to interpret v.kernel network results
v.kernel "Optionally generates a vector density map on a vector network."
I have done this for a network, but I don't understand how to interpret the output of this. Can anyone explain this? I am ...
3
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0answers
101 views
Kernel density estimate with physical boundary
I'm am using adehabitatHR to estimate the size of the foraging range of seabirds using telemetry data. Is there anyway to take into account a physical boundary, where it is impossible for the animals ...
0
votes
1answer
485 views
Network Kernel Density QGIS
I am looking to do a network based KDE to show hotspots of electrocutions along a power line network.
Does anyone know of a tool/method that I can use in QGIS to do this?
(I am also using OSX ...
2
votes
1answer
1k views
Meaning of legend value in Kernel Density? [duplicate]
I have done some analyses on the spatial distribution of traffic signs using kernel density, I used SQUARE_KILOMETERS in area unit, the output is good and clear, but I don't understand the meaning of ...
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0answers
128 views
How to use bandwidth matrix from R in Kernel Density tool in ArcMap?
I want to calculate and map kernel densities using ArcGIS (10.5 so I am unable to use GME). I calculated a bandwidth matrix using the plugin method in the ks package in R. How can I input and use that ...
1
vote
1answer
184 views
How to Iterate Across Fields as Inputs for a single tool (Kernel Density) in ArcGIS ModelBuilder [duplicate]
I am trying to make Employment Distribution of map of a given area in ArcGIS. All the employment information is in this one point shapefile from Census. Different fields show different number of ...
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0answers
81 views
Error while using kde function in GME
Not sure if anyone else has encountered this error. I'm trying to use the kde command to generate some kernel density raster layers based on a shapefile. The error reads as follows:
Error: An ...
3
votes
0answers
826 views
Heatmap Kernel Density QGIS
I am trying to understand the output of the heatmap tool of QGIS (kernel density). For this reason I created a kernel density map for a single point that has a projected coordinate system (epsg: 21781)...
0
votes
2answers
938 views
Kernel Density Tool - Can't change Area Unit?
When I pull up the Kernel Density tool in ArcMap Desktop 10.5.1 I can choose different options for the Area Unit. As soon as I choose a point input feature class, this feature becomes grayed out and ...
2
votes
1answer
2k views
Creating a Heatmap Raster GeoTIFF in R
Is there a way to create a raster heatmap (aka 2d kernel density) from point data in R which can then be exported as a geoTIFF file?
I'm able to create a heatmap in R easily using ggplot2's ...
