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noamdsystematics-co-il-esridist

in Spatial Statistics2 weeks ago (Show more Show less)

What is the algorithm to generate interpolation surfaces of the independent variables using GWR?

When using GWR, based on point data, to conduct spatial analysis, interpolation surfaces are also generated for the explanatory, independent, variables. In the "how GWR works" page (How GWR works—Help | ArcGIS Desktop ), it is stated that "Parameter estimates and predicted values for GWR are computed using the following spatial weighting… (Show more Show less)

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noamdsystematics-co-il-esridist mentioned Spatial Statistics 2 weeks ago Show mention context Hide mention context

What is the algorithm to generate interpolation surfaces of the independent variables using GWR?

noamdsystematics-co-il-esridist mentioned Spatial Statistics 2 weeks ago

David.Rauch@raleighnc.gov_ral in Spatial Statistics3 weeks ago (Show more Show less)

Regression/OLS for point data?

I have been looking around online and whenever I see reference to OLS or GWR, few to no one using point (x,y) data in their tutorials. Why is this and is there a way to do a "what is the relationship between these variables" analysis without attaching the x,y point data to polygons. I am comfortable making grids or associating individual points… (Show more Show less)

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MervynLotter (to David.Rauch@raleighnc.gov_ral) 3 weeks ago (Show more Show less)

Hi David Are you using ArcGIS Pro or ArcMap? Do your point records have any abundance data associated with them. The data points need to contain numeric values that vary in abundance and across space for the ArcGIS regression methods. If you are using ArcGIS Pro, do take a look at Forest-based Classification and Regression—ArcGIS Pro |…

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

Average Nearest Neighbor

I have a question regarding the Average Nearest Neighbor analysis. Is there a scale that describes the levels of the Nearest Neighbor ratio? Are there benchmarks in the literature associated with various Average Nearest Neighbor ratio/scores? For example, can a certain ratio be described as "tightly clustered" versus a different level ratio… (Show more Show less)

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Dan_Patterson

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

There are papers eg ScienceDirect You can generate your own point distributions drawn from statistical distributions (ie bivariate normal, uniform etc) Aren't the statistics enough from those provided by the tool to assist you?

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zli784 in Spatial Statistics2 months ago (Show more Show less)

How to delete 0 data in ArcMap?

Recently I'm working on a project that needs me to calculate the LST of an image. I clipped the raster image by mask and there are many data with an invalid value (pixels outside the mask region) after calculating LST in ENVI software. How can I eliminate those data from the calculation process? Because I need to calculate the max and min as well… (Show more Show less)

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dkwiens

(to zli784) 2 months ago (Show more Show less)

See examples here (your expression would be like "Value > 0", or InRas1 > 0): OutRas = Con(InRas1, 40, 30, "Value >= 2") Con—Help | ArcGIS for Desktop

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geok_2018 in Spatial Statistics2 months ago (Show more Show less)

Choosing conceptualization of spatial relationships - hot spot analysis

Hello, I am new to this forum so apologies if this topic has been raised already. I couldn't find any previous post which actually fully helped with my case. I have circa 270 polygons of different size and shapes for some countries in Asia. A few polygons are dispersed in space, but still have neighbours. My aim is to run Hot spot analysis… (Show more Show less)

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geok_2018 (to RRuthart-esristaff) 2 months ago (Show more Show less)

Thank you! I will look into this. Best

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stephanieduce86 in Spatial Statistics2 months ago (Show more Show less)

Unnamed error with Optimized Hot Spot Analysis, v 10.5.1

Hi, I am trying to run an Optimized Hot Spot Analysis in ArcMap version 10.5.1. This tool worked for me a couple of weeks ago but now there is an error icon next to the Input Features (screen shot attached) and no matter what input layer I select (projected/unprojected/shapefile/feature class etc.) the error does not go away. It doesn't provide… (Show more Show less)

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Dan_Patterson

(to stephanieduce86) 2 months ago (Show more Show less)

If it has worked in the past with the same or similar data, perhaps something has gone bad with your install. From Windows Install/Remove programs, try a 'Repair' of the installation to see if that fixes it. If not, you may need to 'reset your application profile' last step would be an upgrade

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cy.zhu in Spatial Statistics3 months ago (Show more Show less)

Weighted Least Square when calculating errors of GWR

Hello, Does anyone have a clue of how to set the global weight for each feature when calculating the total errors of GWR using the Arc GWR tool? Thanks, Chongyang

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cy.zhu (to cy.zhu) 2 months ago (Show more Show less)

Oh I know where to set the weight for each feature. It's right on that GWR tool! I thought that's a spatial weight matrix as in the OLS tool earlier.

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

How do I map the electricity demand for a country in ArcGIS?

I am learning ArcGIS and would like to know the step by step process on how to map electricity demand of a country. I would also like to know what datasets are needed to complete this task. How do I map the electricity demand for a country in ArcGIS? gis maps electricity demand

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xander_bakker (to TabithaKay) 2 months ago (Show more Show less)

You are welcome. In case you have any question the community is there to help.

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cy.zhu in Spatial Statistics3 months ago (Show more Show less)

Control GWR coefficients

Hi All, I'm doing a GWR model but getting a little bit concerned about the overfitting problem. There's a small portion of the coefficients are negative which does not make sense to me. I'm wondering if Arc has a parameter setting to limit the coefficients to be positive and calculate the best model under that circumstances. If anyone has any… (Show more Show less)

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