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0answers
26 views

Is it possible to use Kriging to interpolate monthly mean temperature data of a point with data from weather stations around this AoI? If yes, how?

I have monthly mean temperature data from a number of meteorological stations around the location for which I actually need the information. I was thinking of using spatial interpolation techniques to ...
0
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0answers
15 views

Weird interpolation “bug” - Arc Geostatistical kriging, lower bound > upper bound

I'm using the wizard in Geostatistical Analyst, ArcMap (10.0 I think) in order to run some simple kriging. Output is set to Prediction. I have two separate inputs, which have points at the exact same ...
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0answers
27 views

Pythonw has stopped working when running arcpy.SubsetFeatures_ga

I'm currently trying to subset a shapefile into training and validation files. When I run the following line of code, python crashes. I'm using ArcGIS 10.1. arcpy.SubsetFeatures_ga(current_shapefile, ...
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1answer
72 views

in R : get a SpatialPolygonDataFrame from gIntersection{rgeos] with sub-area as attribute?

I am using gIntersection (package rgeos) to intersect a polygon shapefile containing 20 buffers zones, with another polygon shapefile containing "ground occupation mode (GOM)" (an area divided in ...
3
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0answers
40 views

Cokriging using categorical covariables in ArcMap?

I am using cokriging to model a continuous variable across my study unit (soil carbon). I have one continuous covariable (soil moisture) but also a categorical covariable (vegetation community). I am ...
0
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0answers
17 views

using variogram for texture in remote sensing

I have a classified image which created with 1500 samples. I want to use the variogram for the texture of categories in order to have better results. To use the variogram I need to have a big number ...
0
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0answers
24 views

Semivariogram modeling in Arc Gis Geostatistical anaalyst

I want to know that what units of distance for lag size is used in geostatistical analyst 9.3.1 Arc Map. I am not getting the same from software. Please reply, if anyone knows about it.
0
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1answer
30 views

Need to develop a model for measuring inter-annual and seasonal variability in pasture cover using modis 16 day composites

Aiming to use statistical methods in ArcGis and Envi image analysis to measure inter-annual and seasonal variability in paster cover using MODIS 16 day composite image from 2000-2014. Quite stuck on ...
3
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0answers
31 views

Preparing data for semiovariogram analysis in ArcGIS with large sample sizes?

I am working on a statewide project to create surface water quality grids from point samples. In some instances, we have large sample sizes (n>50,000) which is problematic when creating ...
3
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0answers
135 views

How to deal with data which are not normally distributed when kriging?

I'm a novice with advanced spatial interpolation, and I'm trying to use the Geostatistical Analyst to interpolate a surface based on borehole data, using Ordinary Kriging. The help file explains how ...
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0answers
28 views

Finding Cooks Distance on ArcGIS

is there a way to find Cooks distance on ArcGis or do I have to use SPSS?
0
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1answer
75 views

Problems applying a mask in Geostatistical IDW

I'm finishing an analysis of approximately 850 archaeological assemblages in the Mediterranean, and I've successfully run IDW in Geostatistical toolbox (ArcGIS 10) to generate the results I like. I'm ...
2
votes
2answers
134 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 ...
1
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0answers
198 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 ...
1
vote
2answers
301 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 ...
2
votes
1answer
136 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 ...
1
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0answers
29 views

Prediction of coastal change [closed]

I have vector data in coastal change for two separate years, like 1950 and 2000. I want to use GIS to create a "Prediction of coastal change" in 50 years, 2050. How do I figure out what is the shape ...
4
votes
1answer
265 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, ...
0
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2answers
123 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 ...
1
vote
1answer
40 views

Geostatistical Analyst Wizard

I have performed cokriging using Geostatistical Analyst in ArcGIS 10. When I tried to export the prediction to raster, the process became so slow. Have you experienced this? Is there a way to make the ...
1
vote
0answers
20 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
vote
1answer
98 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
vote
1answer
88 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
52 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
votes
0answers
31 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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0answers
103 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
votes
1answer
86 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
235 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 ...
1
vote
1answer
357 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 ...
0
votes
0answers
120 views

How to spatialy interpolate forest tree height, basal area data for certain species

I have ecological sample data collected from 5 locations within a 133345678.5678 sq meter area. The data is stored in a point shape file. I have joined tabular data with the point layer by duplicating ...
1
vote
1answer
269 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 ...
13
votes
1answer
4k 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 ...
0
votes
2answers
2k 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
131 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
votes
1answer
499 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 ...
4
votes
1answer
351 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
vote
1answer
827 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 ...