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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)?
michl317's user avatar
4 votes
2 answers
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 ...
ReutKeller's user avatar
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2 votes
0 answers
76 views

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 ...
Lucien S.'s user avatar
  • 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 ...
Omega Rowl's user avatar
2 votes
0 answers
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 ...
Jonathan Bressler's user avatar
3 votes
0 answers
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 + ...
geohitan's user avatar
1 vote
0 answers
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 ...
user29922's user avatar
1 vote
1 answer
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 ...
ReutKeller's user avatar
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0 votes
1 answer
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, ...
Redskies421's user avatar
3 votes
0 answers
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 ...
user2905280's user avatar
0 votes
1 answer
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 ...
LMB's user avatar
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1 vote
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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 ...
Boorn's user avatar
  • 69
3 votes
1 answer
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 ...
sd1984's user avatar
  • 39
0 votes
1 answer
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 ...
KubiK888's user avatar
  • 189
1 vote
1 answer
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 ...
Tky's user avatar
  • 33
4 votes
1 answer
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 ...
Thirst for Knowledge's user avatar
1 vote
1 answer
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 ...
Peter's user avatar
  • 75
5 votes
2 answers
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 ...
MyFamily's user avatar
  • 822
2 votes
0 answers
466 views

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 ...
Zizah's user avatar
  • 123
2 votes
2 answers
679 views

GeoDa crashes when loading shapefiles

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 ...
Thirst for Knowledge's user avatar
7 votes
3 answers
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 ...
FVb's user avatar
  • 349
8 votes
1 answer
2k views

Modifying Bivariate Moran's I /LISA to include self?

I am using GeoDa's Bivariate Moran's I function to examine patterns of collocation between two variables at the county level (call them A and B for now). I know that, having run the analysis I can ...
csfowler's user avatar
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