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anneprovencherstpierre in Spatial Statistics4 days ago (Show more Show less)

Spatiotemporal analysis of binary (presence/absence) data

Hi ! I have a dataset which is in the form of a grid, where I identified the presence or absence of a species at each grid intersect (about 10 000 in total), and this was repeated for 6 time points. I recently learned about space-time cubes and emerging hot spot analyses and thought it would be a great way to explore my data, but it seems… (Show more Show less)

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Dan_Patterson

(to anneprovencherstpierre) 4 days ago (Show more Show less)

begin with a 'sum' using cell statistics on your raster stack Cell Statistics—Help | ArcGIS Desktop A quick way of looking at the time thing beyond a sum of 0, 1, 2, 3, 4, 5, 6 is to class you first raster as 0,1, then your second, multiply by 2, the third, multiply by 4, … 4th, by 8, 5th, 16, 6 by 32. So you will have a progression of 0, 1,…

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krburton in Spatial Statistics7 days ago (Show more Show less)

Ordinary Least Squares Analysis

Hello All. I'm in serious need of assistance trying to find a properly specified OLS model. My goal: produce model to predict probability areas for archaeological sites. I have compiled over 20 independent variables (aspect, elevation, soils, cost surfaces to water, vegetation, etc.). The highest Adjusted R-squared value I have been able to… (Show more Show less)

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mctraverso in Spatial Statistics4 years ago (Show more Show less)

Field not diplaying in Quantities Symbology

Hi I am trying to create a graduate color quantities symbology for a string field in my attribute table but in the drop down menu it doesn't show up. If I go to categories>unique values it shows up in the drop down of the field values. Does anyone know why? Or what I could be doing wrong? Thanks

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jsethi14 (to elterrell) 7 days ago (Show more Show less)

Thank you though. It just worked for me too. I saved my excel as a csv with numeric fields and it worked fine. Thanks again! Jasleen sethi Business Data Analyst 334 E. Broadway, Louisville, KY 40202 Direct: 502-292-6165 Jasleen.sethi@metrounitedway.org <https://www.facebook.com/metrounitedway>[Twitter Email Templates…

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fgrattarola in Spatial Statistics1 week ago (Show more Show less)

How to do regressions with log 0 transformed data ('-Inf' value) ?

Hello ! I'm performing regression analysis (OLS and WGR) using biodiversity data, between sampling effort and species richness values. I have a country-size grid-cell data set and I want to find out how does this relationship varies in different areas of the country. Some of the grid-cells have 0 as value, because there were no organisms… (Show more Show less)

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Dan_Patterson

(to fgrattarola) 1 week ago (Show more Show less)

No problem Florencia... if it works out, you can return and mark the question answered

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brownchr in Spatial Statistics2 years ago (Show more Show less)

Introduction to Spatial Pattern Analysis Video

I am looking for a video clip posted tot he Esri site in the past that discussed various tools in the Spatial Statistics Toolbox. The link I have for the video is no longer active, and I ask if anyone knows of a live link that works or may have this video available to share via other means. The video in question is "Introduction to Spatial Pattern… (Show more Show less)

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curtvprice

(to MervynLotter) 4 weeks ago (Show more Show less)

It moved again, I found it by going to video.esri.com and searching on the title: "Simple ways to do more" Spatial Statistics: Simple Ways to Do More with Your Data Video|Esri

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ccabanero in Spatial Statistics8 years ago (Show more Show less)

fuzzy c-means cluster analysis

Hello, Does ArcGIS Desktop 10 with Geostatistical Analyst perform fuzzy c-means cluster analysis? I am currently working with a procedure that requires I export tables to the R environment to do this. Would be nice if I can stay inside ArcGIS. Thank you, Clint

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RRuthart-esristaff

(to phl1210) 1 month ago (Show more Show less)

In ArcGIS Pro we do not have a tool for fuzzy c-means clustering method. Spatially Constrained Multivariate Clustering can return frequency based probabilities of cluster membership if you use the Permutations to Calculate Membership Probabilities setting. Density Based Clustering…

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cdspatial mentioned Spatial Statistics 1 month ago Show mention context Hide mention context

Re: How serious is it to ignore warnings in Incremental Spatial Autocorrelation analysis?

cdspatial mentioned Spatial Statistics 1 month ago

Tagging: Spatial Statistics for greater exposure. Chris Donohue, GISPPreview Hide preview

cy.zhu in Spatial Statistics1 month ago (Show more Show less)

Space Time Analysis Algorithm Question

Hi all, I'm trying to understand how the space time analysis tool works. However I can't find description on what the tool uses to perform Mann-Kendall Trend test. (1) As shown in the ArcGIS Pro ToolReference website, quote:"The trend analysis performed on the aggregated variables or summary field values is based on the Mann-Kendall… (Show more Show less)

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cy.zhu (to Dan_Patterson) 1 month ago (Show more Show less)

Thank you, Dan! This is also very helpful for my future reference! -Chongyang

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carobbins in Spatial Statistics1 month ago (Show more Show less)

How to reduce sample size to one per cell of fishnet?

Hi, I am trying to reduce my sample size. I have point data and I have a fishnet. I want to keep one sample per cell. What would be the best approach for doing so? I have looked into Create Random Points, but I don't know the number of points I want the feature class to have. Despite this parameter being optional, the tool autofills 100. … (Show more Show less)

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Dan_Patterson

(to carobbins) 1 month ago (Show more Show less)

Carly, you could use a smaller fishnet size, then just summarize the data on a polygon level. It is important to mask out areas where no observations are possible or likely (ie over water etc). Since the number of counters varies on a cell by cell basis, this could also form the basis for a map.... are they there because there are lots of birds?…

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GIS_Solas in Spatial Statistics2 months ago (Show more Show less)

Relationship between point presence and population change

I'm looking for input on how best to evaluate a potential relationship between the presence of a particular type of facility in census district polygons and the population change in those districts. I have a series of population totals by district over many years while the facilities were being built throughout the area, as well as the location… (Show more Show less)

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Dan_Patterson

(to GIS_Solas) 2 months ago (Show more Show less)

There are many good texts on 'non-parametric statistics' out there, some even with spatial applications.... I won't recommend any specifics since it will start a ….but you forgot... battle

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