A group of geostatistical techniques to interpolate the value of a random field at an unobserved location from observations of its value at nearby locations.

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Interpolation of categorical data from a polygon surface with gaps

I have built a vegetation map from a set of historical photographs from 1912. The photographs were taken from the ground (ridges and peaks of mountains), and I have developed a method of ...
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88 views

Interpolating species data from sample points in a small area

I have sample data from a small site (10 acres) which shows the number of occurrences of a particular species of snail over two sampling periods (fall and spring sampling). I want to try and ...
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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 ...
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94 views

kriging of compositional data (grain size)

I have posted this already in the GEONet Forum but without any suggestions, now I am hoping for some feedback here: I have a problem concerning interpolation of compositional data of grain sizes. I ...
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134 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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100 views

Validity of ordinary kriging of polygon centroids

I'm in a discussion with a colleague who believes that kriging should not be used to interpolate a surface from polygon based data (i.e. with kriging applied to centroids), because this effectively ...
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222 views

Empirical Bayesian kriging - does data need to be normal?

With empirical Bayesian kriging (ebk), does the data need to be normally distributed? If I apply a normal score transformation, my data is still not normal. Is ebk kriging thus an invalid ...
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37 views

Downscaling climate data using DEM

I have gridded climate data (temperature and precipitation) at 0,1° resolution and I want to downscale it into a finer scale using digital elevation model. The relationship between the climate ...
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21 views

Measuring error of Spatial Analyst interpolation such as spline, nearest neighbor and kriging?

I am planing to use interpolation method using spatial analyst tool and I found several methods like spline NN and kriging. I know I can do interpolation using geostatistical analyst but some ...
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43 views

How to visualize Smoke Dispersion by interpolating point data

During the last weeks, I am trying to develop an application within my current working project, which aims to simulate smoke dispersion of fire incidents. Software used: ArcGIS for Desktop/Server ...
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123 views

Missing data and negative predictions - kriging daily rainfall?

I want to perform the interpolation of daily rainfall data for 7 years. I am now working on python using arcpy module. I face several problems while performing interpolation Some day there is no ...
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384 views

Ordinary kriging with three dimensions in R

I want to interpolate temperature for a surface defined by three coordinates: longitude, latitude and altitude. I know one option is to use universal kriging on two dimensions and use altitude as a ...
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39 views

Plotting a weighted map like a heatmap in R

I want to plot a map weighted by prices. I got a data frame of latitudes, longitudes and prices: > str(data) 'data.frame': 1253 obs. of 3 variables: $ lon : num 11.2 11.1 11 11 11.3 ... $ ...
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44 views

How to run kriging in modelbuilder with various shapefiles

I need to run kriging in a model, using 5 diferent point shapefiles. I put as input %Name% to run the different shapefiles, but in Z value field I have an error, because it's different in each ...
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74 views

Why is SAGA kriging slower in QGIS than in SAGA itself?

I'm using QGIS for a while. In my opinion the SAGA kriging tool (processing toolbox) is very slow. Is that an QGIS issue? I tried to interpolate a point layer with 300.000 points (I know it is big) ...
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64 views

Cross validation after kriging, in ArcGIS

I performed kriging interpolation using the kriging interpolation tool in ArcToolbox, not the Geostatistical Wizard method. However, how do I determine the cross validation without using the ...
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120 views

Estimating parameters of a semivariogram?

I have got a shapefile of rain gauges with a field giving the precipitation amount in a particular day. I need to interpolate the precipitation values to obtain a precipitation map for a particular ...
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523 views

Error when kriging in SAGA: grid file could not be opened

I have a point and a polygon vector shape (shapes) which I want to interpolate by using the saga tool "Ordinary Kriging". I always get the following error message: Oooops! The following output ...
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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, ...
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154 views

Error when labelling kriging result (contour) - the input layer is not valid

I've finished kriging, creating a contour-map, representing groundwater-height in my area. By a reason I don't know, it isn't possible to label my results. Neither can I export my data to vectors: ...
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81 views

Interpolating counts within irregular-shaped regions in a country?

GIS novice here. We are trying to estimate the total number of toxic waste sites within the country of Ghana. We will be dividing up the country into quadrats (with some irregular shapes on the ...
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351 views

Why does ModelBuilder with kriging give ERROR 001000 Z value field does not exist?

I've built a model which interpolates series of data by IDW method and it works well. But when I tried to change method of interpolation to kriging I encountered some problems with using Z value ...
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716 views

Validation of Regression Kriging

I am interested in exploring the idea of generating a predictive model for a target variable in a spatial context. I would then like to correct the residuals of this model using kriging, i.e. in a ...
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692 views

SDA4PP not found? How to do Kriging in QGIS?

I need to make kriging analysis in QGIS (v1.7.4). I found out, that it should be a part of SDA4PP plugin, but I just couldn't find it in any repository (even third party). It looks, like it just ...
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495 views

How to do Kriging using SDA4PP in QGIS?

I am trying to do kriging using SDA4PP. I have added a delimitted text layer and wish to krige that. When I try I get an error message from SDA4PP as follows... This tool requires at least one ...
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23 views

Gstat: Modelled semivariogram values not matching plotted model using the variogramLine function

I am trying to extract the semivariance values associated with a given semivariogram model developed in gstat, the end goal being to compare modelled semivariance with observed semivariance at defined ...
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18 views

Interpolation for multiple data sets (Independent and dependent variable) in ArcMap

I'm relatively new to ArcMap, and I'm looking at the relationship between the internet and health outcomes. My dependent variables for my regression come from the Demographic & Health Survey (DHS) ...
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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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12 views

Kriging problem within ArcGIS Model Builder

I am creating a model that accepts in a .csv file and plots the XY points on a calculated field. The preferred interpolation method is Kriging, and when I try and update the Z-Value field, the ...
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52 views

Error when kriging: “output variance prediction raster”

I am trying to run a python script for kriging, but keep getting a following error message. It doesn't make any sense as the output variance prediction raster is optional. The code: # Create ...
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61 views

Kriging metal concentration with irregular set of sample points

I need to perform some interpolation to map a metal concentration around a platform. The distribution of my stations is not regular (see figure below where stations are the green points labelled with ...
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73 views

confidence intervals on raster produced by kriging spatial interpolation

I have used spatial interpolation to generate a raster that estimates percentage of a variable of interest (e.g. expected percentage at unsampled locations given frequencies at nearby sites). As I am ...
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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 ...