Gianmarco Alberti

12 Questions 35 Answers 0 Followers

Questions related from Gianmarco Alberti

Does anyone have access to this article?

Does anyone have access to the following (quite old) article: A sample size correction for Pearson Chi-Square in 2 × 2 con... It would seems that I have no institutional access to it, and i was...

30 August 2023 6,000 1 View

How to calculate the expected number of points within some polygons under the hypothesis of random distribution?

Hello, I am looking for suggestions as to how solve what follows. Let's assume I have some Thiessen polygons built around some locations (crosses in the attached image). Some points (red dots...

12 January 2018 6,820 4 View

How to interpolate wind direction in GIS using transformation?

Hello. I have a point shapefile representing the location of weather stations; for each point, the wind speed and wind direction (in degrees) is recorded. I need to create a cotninous surface...

27 April 2017 5,993 10 View

Any info about the accessibility of the "Wind and waves atlas of the Mediterranean Sea"?

Hello. As per title, I was wondering if the Wind and waves atlas of the Mediterranean Sea is freely accessible, and if it is, from where (and/or from what institution). Best Gm

10 March 2017 3,649 3 View

Slope in degree or percent when implementing Tobler's hiking function in GIS?

Hello All, as per title, I am rather confused as to using slope raster in degree or percent when implementing Tobler function in GIS. Some sources (A, B, C) seem to point to slope degree, while...

17 January 2017 7,924 23 View

What's the reason for deriving Cohen's w from Cramer's V if the latter is already a measure of effect size?

In Sheskin's Handbook of Parametric and Nonparametric Statistical Procedures, for each categorical association coefficient (e.g., Pearson's C, Pearson's phi, Cramer's V), the Author also takes...

03 November 2016 6,046 2 View

How we can calculate the average leverage when one predictor is categorical?

In Logistic Regression (as in regression in general), when it comes to check model's diagnostics, one has to check for observations with higher-than-average leverage. From what I read in several...

30 September 2016 4,676 3 View

Does anyone know about possible function of ceramic disks from prehistoric contexts?

I was wondering if anyone has ever come across ceramic disks from prehistoric contexts, huts in particular. By ceramic disks I mean sherds from pots' wall, reworked in such a way to eventually...

01 May 2016 8,119 25 View

Is there any study on the relation between grinding tools size and household size?

Hello, I have found an interesting study in which the author elaborates on the relation between millstones (also termed metate) and handstones (also termed manos) size and their efficiency in food...

25 February 2016 3,197 4 View

Does anyone know about autocorrelation in spatial modeling by logistic regression?

I am wondering if anyone here has ever dealt with spatial autocorrelation using Logistic Regression in GIS. In the literature I have read so far, sometimes the issue is not even addressed. In...

31 July 2015 5,940 12 View

Can anyone recommend any GIS shapefiles of Mediterranean basin?

Hello, As per title, I am wondering if is it possible to find on the web a free resource for GIS shapefiles (georeferenced) of the Mediterranean basin, or even of the whole Europe and northern...

01 October 2014 6,686 9 View

Can anyone recommend a data source for Mediterranean tides and currents?

Hello. I was wondering if anyone knows about the availability of free data on tides and currents in the Mediterranean area. In particular, I am interested in south central Mediterranean (Sicily...

30 September 2014 5,995 12 View