Questions tagged [geostatistical-analyst]

Geostatistical Analyst is an ArcGIS for desktop extension, that provides a suite of tools for spatial data exploration and surface generation.

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votes
3answers
1k views

Is kriging an exact interpolation method?

Can kriging be an exact* method? For example, when optimized with the Geostatistical Wizard? Or in any other way? (as far as I know, "normal" kriging isn't an exact method). *exact: predictions at ...
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0answers
855 views

Creating landslide susceptibility map using logistic regression and ArcGIS Desktop? [closed]

My project is to build a landslide susceptibility map using logistics regression. I have generated the following maps so far: slope map, hill shade, curvature, elevation, road buffers, river buffers ...
2
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2answers
1k views

Geostatistical Analyst raster export looks completely different

I'm having trouble trying to re-create how a Kriged layer looks when interpolated using Geostatistical Analyst. I like the level of generalization (smoothness) of the filled contours in the "temporary"...
2
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1answer
472 views

Cross-validation and optimal p power in IDW

I use the "Geostatistical Wizard" in ArcMap 10 to do my interpolations. For example, when I do IDW and I want to decide for the optimal p power or the optimal number of neighbors that will contribute ...
6
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1answer
1k views

Classical or robust variogram for incorporation into generalized linear model

I'm modeling counts of organisms over time at eleven locations. I'd like to account for temporal autocorrelation in the counts, assuming it's present. As the data are not equally spaced in time, I'...
1
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2answers
917 views

Why do the range of values change when I export geostatistical layer to raster?

I did an interpolation of soil pH using 232 data points in geostatistical analyst with IDW, RBF and ordinary kriging. For all 3 methods, the range of pH values change (become smaller) after I export ...
0
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1answer
89 views

Improving Geostatistical Analyst Wizard performance?

I have performed CoKriging using Geostatistical Analyst in ArcGIS 10. When I tried to export the prediction to raster, the process became so slow. Is there a way to make the exporting faster?
1
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0answers
36 views

Verifying time-invariance for spatial gradients of air pollution?

I have data from a network of NO2 passive samplers. Measurement are repeated in the same positions in different years. I need to verify if spatial gradients in air pollution remain constant in time, ...
1
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1answer
134 views

Wind turbine placement optimization and loss on surrounding house value

I am doing a geostatistical placement optimization study on where would be the optimal placement of a wind turbine in a Danish region. One of the variables taken into account is the cost on the value ...
1
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1answer
178 views

How to show GeoStatistical Analyst Layer in web map using ArcGIS Javascript API?

I have created a "GeoStatistical Analyst Layer" with "Diffusion Interpolation with Barriers" tool and then I published it on the ArcGIS for Server. How can I show this layer in my web map application ...
2
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0answers
61 views

Is there any statistical method to proof if the method is suitable or not [closed]

I have recently done a phenological study using threshold method from MODIS NDVI images. But I'm suffered that I don't have any situ observation (ground truth) data to do validation. Is there any ...
3
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0answers
40 views

Finding closest anticorrelated polygon or automate what is learned in semivariogram?

I am trying to do spatial autocorrelation of sorts based on a layer of polygons of mean rainfall data. I want to see how rainfall deviates from a certain point on the landscape. Essentially, I want to ...
1
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1answer
176 views

Set a theoretical (not empirical) variogram in ArcGIS Geostatistical Analyst

I'm trying to do some Unconditional Gaussian Simulations using the Gaussian Geostatistical Simulation tool (see here). However, I don't have any data that I am doing this from - just a theoretical ...
2
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1answer
135 views

Examining the covariance between biodiversity and other variables

I have som problems with an analysis and would be very grateful for any answers or suggestion. The background is: - I want to examine the covariance between ecosystem services in an area. I don´t ...
2
votes
1answer
457 views

ARCGIS10: updatelayer results in error - LayerObject: Get attribute renderer does not exist

I'm quite new in using python in Arcgis 10. I wanted to use the symbology of a geostatistical layer in the TOC in another geostatistical layer in the TOC. Therefore, one should use arcpy.mapping....
2
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1answer
738 views

Diffusion/Kernel Interpolation with barriers? [closed]

I need to interpolate water quality data in a rather small area with peninsulas, islands and developed coastline that will act as barriers between my testing/sampling points. I understand I have to ...
1
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1answer
503 views

IDW: Default Maximum Distance and Coincident Points

The ArcGIS Help file says the Default Maximum Distance, when using the Variable Search Radius in IDW, is the extent's diagonal, however, no value is automatically filled in the corresponding box after ...
19
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2answers
10k views

Minimum number of samples for kriging interpolation

I get some data with number of specimens with a request to interpolate it using kriging method. After some investigation it appeared that kriging results (performed in ArcGIS Geostatistical Analyst ...
1
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2answers
5k views

Difference between Geostatistical Analyst and Spatial Analyst toolboxes for interpolation?

I did interpolation on point data using "Geostatistical Analyst" tool. It gives me surface layer. Then I exported this layer into raster image (by right click on this layer=>export data into raster) ...
3
votes
0answers
155 views

Which geostatistical tools to use to determine surface changes over 40 years?

I have a data from the Weather station with SWEmax (snow water equivalent) collected over 40 years. I need to interpolate the data over my river's watershed and then, somehow, determine the ...
4
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1answer
666 views

Statistical analyses for survey against raster?

I am somewhat of a newbie to geostatistical analyses, but pretty familiar with GIS and remote sensing packages. I was wondering if anyone had suggestions on appropriate geostatistical analyses for a ...
7
votes
1answer
2k views

Explaining different Standard Deviation results from same data in ArcGIS Desktop and MS Excel?

I have done some interpolation in Geostatistical Analyst in ArcGIS and I got the Standard Deviation (SD) a bit different from the SD that I calculated in Excel Spreadsheet. What algorithm does each ...
4
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1answer
825 views

Regression with Nominal and Categorical Data

I am doing a project looking at the prevalence of a weeds in an area. As an example, I have the following layers: Weeds Layer (polygons) {categorical data} Each polygon represents a point or polygon ...
1
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1answer
1k views

How to convert Geostatistical analyst (GA) file to Raster FAST?

I have been trying to convert a number of Geostatistical analyst files that i were created using Geostatistical wizard in ArcGIS 10. I want to save these files as Raster and use the File Am i ...