Semivariogram/covariance binned and average points

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06-07-2016 02:58 PM
MustafaSikder1
New Contributor II

I am sorry if I am unaware of some very basic ideas of semivariogram. I am trying to understand the difference between binned points and averaged points. In this document (http://desktop.arcgis.com/en/arcmap/latest/extensions/geostatistical-analyst/fitting-a-model-to-the-...) it says: "Binned values are shown as red dots, and are generated by grouping (binning) empirical semivariogram/covariance points together using square cells that are one lag wide. Average points are shown as blue crosses, and are generated by binning empirical semivariogram/covariance points that fall within angular sectors."

My question is, what does it mean by "fall within angular sectors".

Any suggestion will be helpful.

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3 Replies
DanPatterson_Retired
MVP Emeritus

In the images shown on that page, the figure to the lower left is trying to whether there is any directionality in the data,  The sectors, presumably are that directional representation .  Similar information can be portrayed when looking at

Examining spatial autocorrelation and directional variation—Help | ArcGIS for Desktop

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MustafaSikder1
New Contributor II

Do you have any clue how this angular sector is calculated or can you give an example?

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DanPatterson_Retired
MVP Emeritus

they don't cite the forumlae used, but the images refer to 'brushing' on the figures to select data so you can examine the various associations... this is marginally explained in Exploratory Spatial Data Analysis (ESDA)—Help | ArcGIS for Desktop , for the tools that it covers.  I would have to dig myself, but there are many books available, just not with an arcgis basis, which I presume you really want

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