# Questions tagged [geoda]

program of GeoDa Center that implements techniques for exploratory spatial data analysis (ESDA)

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### Exporting spatial correlograms

Is there a way to export spatial correlograms produced in GeoDa as a pdf without taking a screenshot (that would look a bit unprofessional in the paper I am writing)?
212 views

### pygeoda - LISA for round polygon

I have just started to use pygeoda package and I have tried to calculate LISA . I had originally raster which I polygonized to have polygon for each pixel: I have applied MORAN I and LISA on the ...
• 2,149
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### Local Moran's I on spatially heterogeneously sampled dataset

I have a dataset where points are sampled in space. Values are attached to the points, and I'd like to check if these values are correlated in space with Geoda's local Moran's I. However, the sampled ...
• 191
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### Geoda OECD map question

For my undergraduate thesis I must do a spatial analysis over the OECD countries, but I cannot find a map for them, due to them being so spread apart. Funny thing, even my spatial analysis teacher ...
63 views

### Measure of "Matchingness"/Correlation between polylines [closed]

I am working with two layers of polylines that represent different modeled/representative approaches to summarizing aircraft radar tracks. I am curious if, beyond just visually inspecting them, if ...
73 views

### What is missing in my spatial lag equation model?

I worked it in GeoDa but I think something is missing. What is the right equation for a spatial lag model? In my understanding to predict a variable Y is as follows: Y = w_t_homi100 + CONSTANT + ...
• 31
1 vote
102 views

### Local or global Moran's I minimum neighbor connectivity rules of thumb and justification

I am trying to run a univariate local Moran's I (in GeoDa) and I'm questioning my spatial weights, trying to do different neighbor counts / distances in increments and evaluate my results. I was told ...
1 vote
78 views

### Comparing between two polygon class values

I have one polygon shapefile with two fields that I would like to detect their difference. the fields have the same class values: between 0-4: This is the first layer: and this is the second: I ...
• 2,149
497 views

### How do you find the appropriate spatial weight to use for a spatial analysis? [closed]

I am currently about to run a spatial regression (OLS, Lag, Error etc) for my dataset. My dataset contains 1000 randomly generated points throughout the utilisation distribution for my animals (so, ...
• 117
725 views

### LISA (local indicators of spatial association) p values in R versus in Geoda

When calculating LISA statistics in GeoDa versus using the localmoran() function in spdep, the I values are nearly the same, but the p values can be quite different. I know the two programs calculate ...
142 views

### 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 ...
• 1,166
1 vote
615 views

### Why are Moran's Index calculated in GeoDa and ArcGIS different? [closed]

I recently have found that the Moran's Index calculated in GeoDa and ArcGIS are different based on the same data and the same spatial matrix. For example, this is my testing shapefile, a point ...
• 69
691 views

### Merging shapefiles with DBF file, error with duplicate values

When I try to merge my household data file in a .dbf format with my shapefile by using key variable, I get the following error message: Chosen table merge key field IL contains undefined or ...
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522 views

### How to merge CSV and county shapefile?

I have some data in a CSV file. One of the interested variable is test done (1=done, 2=not done). There is a variable of county name in which I would like to join with a county shapefile. I only know ...
• 189
1 vote
585 views

### Projection of Boston housing data

Boston housing data provided by GeoDa center is a well-known dataset. GeoDa Center provides this data in shapefile format. A metadata file included in the download indicates that the data use ...
• 33
533 views

### Can I ignore very low levels of spatial autocorrelation in my data?

I have >1 million postcodes clustered in ~7000 middle super output areas for England and Wales which I'm analysing using MLwiN. I have used a multilevel model with random effects and have clustered ...
1 vote
2k views

### How to convert GeoDa .GAL or ArcMap .SWM file to Matlab (.dat)?

I want to convert a spatial weight matrix from either ArcMap (.SWM file) or GeoDa (.GAL file) to an .dat Matlab file. So far, I only found the STATA package spwmatrix to do this. But the command line ...
• 75
16k views

### How to do spatial correlation between two variables on ArcGIS 10.1?

I have two raster datasets and I'm trying to determine the extent of their spatial relationship. I suspect they are closely related but I would like to produce a map output to illustrate this ...
• 822
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### Bivariate Mapping (running a single variable regression and mapping r-squared value)

I am hoping to produce a bivariate map displaying the correlation between two variables (specifically percent SNAP participation by county against several social variables). I would like to produce ...
• 123
679 views

I'm trying to load around 6000 shapefiles (all the postcodes for a city) into GeoDa but it crashes everytime ("OpenGeoDa.exe has stopped working"). Their troubleshooting page details this problem but ...
988 views

### How to compare spatial patterns (crime cases vs population)?

I am looking for a way to statistically compare two spatial patterns in shape polygon data (not point pattern analysis). Let's say I have a city map divided in neighborhoods (barrios), in shape ...
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