The tag has no wiki summary.

learn more… | top users | synonyms

0
votes
0answers
12 views

Figure out best Geostatistical Analyst Wizard kriging settings for hotspots

I need to interpolate some chemical results that have "hotspots" near the locations of releases related to former site operations. I need to honor the data points and use their exact values even at ...
1
vote
1answer
37 views

Is there a way of applying an exact Kriging interpolation?

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).
1
vote
0answers
47 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 ...
0
votes
2answers
50 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
24 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
vote
0answers
21 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
0answers
40 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
votes
1answer
49 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
24 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 ...
0
votes
0answers
16 views

How can I verify 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
88 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
51 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 ...
1
vote
1answer
71 views

mathematics of spatial diffusion models

There are different types of spatial diffusion such as contagious model, migration model, etc. What are the good books to learn about the mathematics behind these spatial diffusion models?
2
votes
0answers
48 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 ...
2
votes
0answers
29 views

Is there a way to find the closest anticorrelated polygon or automate what is learned in the 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
vote
0answers
73 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
72 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 ...
1
vote
1answer
175 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
245 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
91 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
197 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 ...
11
votes
1answer
2k 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
1k 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
114 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
434 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
249 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
613 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 ...