Questions tagged [kernel-density]
A raster-based operation that spreads point values throughout their neighborhoods.
121
questions
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0answers
24 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 ...
0
votes
0answers
16 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
96 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
33 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
81 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
36 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 ...
1
vote
1answer
334 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 ...
1
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0answers
48 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
32 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 ...
1
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0answers
24 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
122 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
votes
2answers
75 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.
3
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0answers
265 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
vote
1answer
21 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
votes
1answer
54 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 ...
1
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0answers
73 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
37 views
QGIS Heat Map output not correct
Fairly new to QGIS here. I'm having trouble creating a heat map in QGIS3 from a set of points.
I've followed what others have done online (e.g.: https://www.youtube.com/watch?v=o9Gqrr5cYrY) but in my ...
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0answers
86 views
Understanding output of Kernel Density Estimate from AniMove?
I found the AniMove plugin for QGIS to do the Home Range Analysis for Dolphins.
I load all the points of the sighting, and perform the task using the plugin. I got the contour as polyline, and ...
0
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0answers
366 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 ...
1
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0answers
39 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
votes
0answers
332 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 ...
0
votes
2answers
409 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
54 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
118 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
254 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
113 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 ...
1
vote
1answer
501 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
904 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
68 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
459 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
127 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
1k 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
...
0
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0answers
44 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
250 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
262 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 ...
1
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0answers
31 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
votes
0answers
98 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
409 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 ...
1
vote
0answers
123 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
139 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 ...
1
vote
0answers
73 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
741 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
802 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
1k 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 ...
4
votes
1answer
1k views
Spatial interpolation from categorical data in R
I have a spatial point data set, where each point represents a person pronouncing a word in a specific fashion. Let's say I have six different pronunciations.
In an earlier iteration, I aggregated ...
1
vote
0answers
190 views
Calculating Kernel Densities Using A Loop in Geospatial Modeling Environment
I'm currently trying to loop through my shapefile of telemetry locations to calculate kernel densities using the 'PLUGIN' bandwidth. I tried the following code in R to create a script that can be ...
-1
votes
1answer
198 views
Network Based Kernel Density estimation Guiding Module for ArcGIS Desktop?
I need a guidance module for performing Network Based Kernel Density Estimation in ArcGIS 10.5. When I was going through several answers here, I saw Nearest Neighbor Analysis for route events about an ...
1
vote
0answers
39 views
Seasonal changes in habitat use from radio tracking data - how to analyse?
I've been given some data to analyse on deer movements. I have data for the movements of 10 deer over a year period. There are 35 GPS locations per dear for each season (4 seasons).
I would like to ...
1
vote
0answers
119 views
Boundary of output raster for kernel density tool not congruent w shapefile boundary [closed]
I am using the Kernel Density tool in ArcGIS Desktop 10.4.1 to visualize population density around two metro area transit lines. According to ESRI: "The Kernel Density tool uses an algorithm to ...
