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Questions tagged [geographically-weighted-regression]

GWR or Geographically Weighted Regression is a local version of spatial regression that generates parameters disaggregated by the spatial units of analysis.

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How to include duplicate samples (same locations, different temporal sampling) in Geographically Weighted Logistic Regression? [closed]

I want to assess local most important predictors for a specific event within a region. The same locations (grid) were all sampled in two different time occasions. I am assuming predictors to be ...
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Spatial LAG regression towards a categorical variable

This a theoretical question, so I apologize if this is not the appropriate place to ask it. Is it possible to apply Spatial LAG regression towards a categorical variable? In my experiment there are ...
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Geographically and Temporally Weighted Regression on ArcMap

I am trying to run some analysis on Arc Map (Arc-gis 10.5) using the Added-in tool Geographically and Temporally Weighted Regression. However when I input features (my file) on the input features box, ...
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55 views

Geographically Weighted Regression with overlapping polygons

Is it statistically correct (or possible at all) to calculate a spatial regression with (partly) overlapping spatial areas? I have market areas as the spatial unit with different sociodemographic, ...
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R: Inverse square distance weight matrix

I have written the following code to generate an nverse square distance weight matrix for running spatial-autoregressive econometrics models. It avails itself of the spdep R package. Is it right? s = ...
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76 views

Generate spatial weight matrix from file in ArcGIS

I am trying to create a spatial weight matrix from an existing file in ArcGIS. I need to use another file, as opposed to generate the weights in Arc, because I define non-standard weights. The ...
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628 views

Problem with aes and ggplot2 while plotting gwr/aes length

Having trouble with the following code while doing a Geo-regression MF <- read.csv("MF.csv", sep=",") modelo1 <- lm(MF$MFALC_15_2 ~ MF$MFEFF2015+MF$agro1315+MF$MEDALC+MF$density) summary(...
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I am trying to run a GWR in GWR4, i am unable to see the variables field list under the model tab

I am trying to use GWR4 for Running a GWR and GWLR model, have been able to open the data file as a csv file and see the variables. However, am unable to see the variables listed under the model tab, ...
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Google maps: weighting of data

When you create a map in Google Fusion Tables, there's an option to weight your geographical data points against data in another column. What is the math behind this weighting?
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What is the W_{variablename} variable in GeoDa's spatial lag model?

What is the W_{variablename} variable in GeoDa's spatial lag model output? The geoda workbook does not give any explanation. As far as my knowledge goes a spatial lag regression model does not need ...
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1answer
99 views

Could the result of GWR regression be valid when the number of feature class used in the analysis is not up to 30

I am using Spatial Statistics tool (GWR regression)of the ArcGIS 10.3 for my PhD research, the smallest geographical area in the study is called a ward. There are 27 wards in the study area, these ...
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192 views

GWR with dependent and explanatory variables in different files

I have a point shapefile (let's say A) with pollution measures (let's say Y). My hypothesis is that pollution at theses locations is primarily driven by nearby industrial units and not by activities ...
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1answer
284 views

How to estimate kernel bandwidth function with cross-validation gwrr package

I am relatively new to R. I am attempting to use the gwrr package because I suspect that local collinearity may be an issue in my geographic weighted regression model. If I am not mistaken, I first ...
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189 views

Small sample size for geographically weighted regression; limitations

I am studying West Nile Virus risk factors in a specific county using mosquito surveillance data over a ten year study period. The highest resolution of the mosquito data that could be obtained was at ...
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1answer
573 views

Using R to do logistic geographically weighted regression(GWR) prediction

I'm using the R package "GWmodel" to do the logistic GWR, but this package doesn't provide the prediction function for generalized GWR(Binomial/Poisson). How can I do the Logistic GWR prediction using ...
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Exploring the association between two variables on QGIS

I am doing a project on primate electrocutions. I have primate population density data - in the form of point data for each troop, and in the attribute table I have the total number of monkeys for ...
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1answer
110 views

Assesing covariate significance in geographically weighted logistic regression?

In a logistic regression the significance (p) of each covariate can be calculated. For the case of a geographically weighted logistic regression (GWLR), I currently am working on a model for event ...
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1answer
2k views

How to plot output from GWR in R

Although I've a regular r user I have only ever computed GWR in arcgis, and now I'm using R I'm just a little confused. I seem to have got my GWR results and now need to go about plotting them on a ...
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Interpolating geographically weighted regression (GWR) - fit to raster?

Using the spgwr package I followed this tutorial and found a way to interpolate the result to a raster layer (gwr on pixel/raster data using the meuse data set, further down the script). But the ...
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1answer
2k views

Geographically weighted regression with QGIS / R / etc? [closed]

I have a small project where I'd like to investigate the relationship between number of events (many thousand x-y points) in a city and the rent of each neighbourhood (around 50 x-y centroid points of ...
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Exporting Spatial Data Frame of GWR results from R

How can I export Spatial Data Frame of GWR results from R? Do I need to use readShapeSpatial? bg<-readShapeSpatial("BG_Div_NO2_Solar_Nozero.shp") df.bg <- as.data.frame(bg) df.bg.spdf <- ...
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456 views

Geographically Weighted Regression - Problem to run model with floating explanatory variables

Can anybody tell me please why I cannot run the GWR model in ArcGIS 10.3 with a floating explanatory variable? When I convert the floating explanatory variable in an integer variable, then, the ...
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273 views

GWR- interpreting standard residual and local R-square

I have run GWR for a layer with polygons. For some features the Std Residual has high value as well as the local R-square. How is this possible? If std residual is high, the predicted value will ...
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2answers
947 views

Interpreting result of Geographically Weighted Regression (GWR)?

I want to use the Geographically Weighted Regression (GWR) to model local relationships between my dependent variable and a set of independent variables. When running GWR in ArcGIS, the coefficients ...
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688 views

GWR - “significant” local regions?

I ran a Geographically Weighted Regression (GWR) model to find out, in which local regions my independent variables have a strong, moderate or weak relationship. After doing so, I only want to focus ...
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501 views

Interpreting GWR Result - Issue

I used the Geographically Weighted Regression (GWR) to find out which independent variables lead to crime and how they vary over the space. After a literature review, I ran a global Ordinary Least ...
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Performing Geographic Weighted Regression (GWR) in Java?

Is there any existing GWR (Geographic Weighted Regression) packages in Java? The packages should be able to conduct the basic GWR, the bandwidth optimation and some significance test.
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Creating georeferenced random data in Python/R? [closed]

I'm writing a dissertation on different parameter settings in GWR . In order to perform tests I'd need the availability of geo-referenced data that show some sort of spatial correlation (i.e. values ...
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1answer
471 views

Normality, Ordinary Least Squares (OLS) and Geographically Weighted Regression (GWR)

Most of the publications I have reviewed, conduct both OLS and GWR for comparison, and prior to analysis, ensure dependent and explanatory variables are normally distributed. Can someone explain why ...
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1answer
267 views

Determining degrees of freedom for Geographically Weighted Regression (GWR) in ArcMap?

I'm doing Geographically Weighted Regression (GWR) analysis in ArcMap and need the degrees of freedom for the model in order to calculate p values. The summary does not list degrees of freedom, but ...
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543 views

R geographically weighted regression with negative binomial distribution

I'm trying to find a R package that allows me to do geographically weighted negative binomial regression. I'm aware there's 'spgwr' and 'glm.nb' package. But is there a package that combines the two? ...
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1answer
614 views

Geographically Weighted Regression Steps

I am looking for either an answer or a resource that will outline the steps I need to take to perform a GWR, including screening variables and the interpretation. I have access to ArcMap with all ...
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111 views

Ordinary Least Squares Checks Prior to Geographically Weighted Regression and what to do when the Jarque–Bera Test is Significant

I have read that the following 6 criteria need to be met for the OLS model with respect to variables prior to performing a GWR on them: (Is this correct?) and ... 1) Spatial Autocorrelation (my ...
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1answer
1k views

Geographically Weighted Regression Using the Poisson Distribution

From my reading so far, GWR uses the Gaussian or bisquare distribution. My dependent and explanatory variables are rates. I was reading Chapter 12 of Spatial Statistical Data Analysis for GIS Users by ...
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1answer
146 views

Screening Variables for GWR?

I was wondering if there is a list of steps I can take to screen my variables for assumption violations prior to using them in my GWR. I have watched this video tutorial : https://www.youtube.com/...
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364 views

Null values in Geographically Weighted Regression Analysis

Some of my explanatory variables have a few null values for certain polygons. Can Geographically Weighted Regression Analysis handle these, or should I remove the whole polygon and all data (...
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110 views

Help with Geographic Weighted Regression: Condo Prices

I was working on a GWR Problem in ArcGIS to figure out the potential real estate values of Condos in a city. I thought I was following everything correctly but I keep receiving the same error over and ...
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Geographically weighted regression for GPS tracking data

I am hoping some one might be able to help me with the following question. The study I am working on has GPS locations at 4 hourly intervals of 5 lions in 3 National Parks over roughly 2 years in ...
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2answers
840 views

Conducting geographically weighted regression on a raster

I have a relatively big raster file on which I want to conduct geographically weighted regression. Size of raster ~ 2 GB and number of rows is around 100,000 One way might be to convert from raster ...
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4answers
2k views

What are the most efficient Geographic Weighted Regression packages?

What are the most memory efficient open source packages for calculating a geographically weighted regression (GWR)? I am in a situation where I need to do a geographically weighted regression on a ...
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1answer
320 views

Which spatial weighting function does ArcGIS' GWR use?

I am running Geographically Weighted Regression and originally was using ArcGIS to carry out the analysis until I read/heard mixed reviews about it. I have now tried a different programme to run it (...
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1answer
788 views

GWR Result Issues

I am working with GWR to identify if there are any relationships between 'extreme' events and disease incidence. The use of GWR has been employed because I am working in a region where local ...
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2answers
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Regression Model and Spatial Autocorrelation

I have used OLS and GWR for validating the dependencies between two distinct database. The Residual Square for GWR is 0.82 and thereby making it the right regression model to be used for determining ...