Questions tagged [kernel-density]
A raster-based operation that spreads point values throughout their neighborhoods.
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18 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
24 views
Understanding the 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 ...
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0answers
220 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
28 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
184 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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1answer
103 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 ...
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0answers
49 views
Difference between/uses of kernel and line density?
I am reading up on density calculations and their variants, and situations to which they might each be applied.
I have read the article on differences between point line and kernel density
I was ...
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1answer
47 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 ...
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35 views
ArcGIS-GME error when using “kde” tool
I need to estimate home ranges and I want to use the KDE with the plug-in bandwidth, using ArcGIS 10.1 + GME.
I get an error when I run the command and I believe it may be related with the output ...
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0answers
77 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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63 views
Assessing density of land use changes in QGIS?
I have 3 shapefiles, each one represented by polygons that show the changes in land use that took place over two years (for example 1955/1988 - 1988/2013 - 2013/2017). Each of these polygons is formed ...
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2answers
82 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
274 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 ...
3
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1answer
566 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
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1answer
45 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 *...
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2answers
265 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
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1answer
86 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
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2answers
495 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
32 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
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2answers
131 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
182 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
27 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
82 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
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1answer
278 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
567 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
103 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
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1answer
93 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
53 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
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0answers
563 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
538 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 ...
1
vote
1answer
821 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 ...
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0answers
661 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 ...
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0answers
170 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
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1answer
139 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 ...
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0answers
37 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 ...
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0answers
87 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 ...
1
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1answer
680 views
Kernel density and polygons
need a work around to produce a kernel density map of polygons (national parks system) layer at 30m grid cell and 500m bandwidth. the kernel density tool in ArcGIS 10 does not work with polygons.
...
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0answers
149 views
Conducting kernel density on shapefile containing 600,000 points in ArcGIS Desktop
I have an shapefile with 600,000 points (they are air parcels). The only parameter that is in the attribute table of this shapefile is X and Y coordinates. A part of this attribute table is like this: ...
2
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1answer
126 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 ...
0
votes
1answer
142 views
Publish Kernel Density Layer Which is Transparent
I am using ArcGIS Pro 1.4 to publish web layers which are the result of a kernel density operation. I am using mining data from MRDS for China. The raster layers were created and published to AGOL ...
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0answers
57 views
Point Density Percentage Changes
I'm hoping to find out the methodology for mapping increases and decreases in point based occurrences from multiple tables.
Eventual output: A map displaying point density/kernel density increases ...
1
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1answer
136 views
Near analysis by group
I am performing a Near analysis by group (https://blogs.esri.com/esri/arcgis/2010/09/16/nearbygroup/) on points:
Points following each others linearly represent structures. They have same attribute. ...
3
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2answers
197 views
Mapserver - Kernel Density Layer - weight
I have created a map file broadly as shown below. I then created 6 points as in the DATA_TABLE. The 3 on the left have val 100 and the three on the right have val 1.
When I view this layer it renders ...
2
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1answer
150 views
How to enable LSCV bandwidth on AniMove 1.4.2 (QGis 2.14.4)?
I'm trying to make some Kernel Analysis for animals home range and the option "LSCV" of bandwidth selection isn't appearing, the plugin give me only three options (rule of thumb (Scott), rule of thumb ...
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0answers
126 views
Calculating density using information linked to polygons?
I'm fairly new at GIS and am using ArcMap to calculate the population density of lizards on an island. On our island, we have about 80 trees, and each tree is mapped as a polygon on a single layer. We ...
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0answers
126 views
Using Ripley's K-Function and Kernel Density Estimation?
Having issues applying Ripley's K-Function and Kernel Density to apply to ACLED (Armed Conflict Location & Event Data) point pattern analysis.
The issues relates to how do you know the correct ...
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1answer
355 views
Kernel Density Arcpy?
I have 3 point feature classes (test30, test90, test180) in a scratch.gdb. I would like to create a kernel density raster for each dataset. I would like the output of the kernel density raster to be ...
2
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0answers
392 views
R code for Kernel Density Estimation
During the process of doing kernel density in R, using UK crime data as data set.
Below is the work I have done so far but encounter some issues:
library(ks)
library(raster)
data1<-subset(data,...
-1
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1answer
352 views
Overlap between two kernel densities in ArcGIS for Desktop? [duplicate]
I have two different kernel reclassified raster files and I would like to find the overlap area between them, what I should do?
I have tried Boolean operators and map algebra and it does not work.
0
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1answer
238 views
kde.points SpatialPixelsDataFrame to geojson
I have a multiple projected spatialpixelsdataframes produced from kde.points() and would like to use it in a leaflet map.
Basically the same as Brunsdon example with the New Haven crime data, except ...
