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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33 views

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 ...
2
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1answer
39 views

Variogram for data along linear routes

I have a dataset of some measurements along a bus route (image below). The purpose of my study is to be able to detect the values at any location along the route using Kriging interpolation. I have ...
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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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20 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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38 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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42 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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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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1answer
18 views

In jgrasstools kriging, what is the variogram model used when defaultVariogramMode = 0?

In jgrasstools 0.78, what are the variogram models corresponding to the values 0 and 1 of the defaultVariogramMode field? For mode 1, it seems to be a Gaussian variogram, by looking at the source. ...
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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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13 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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1answer
23 views

Getting range value from exponential variogram model

I am using vgm() from the gstat library in R: variogr <-vgm(sill,"Exp",range=range,nugget=0) output <-krige(...,model=variogr) As you can see I'm using fixed psill and range values. Before ...
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1answer
51 views

Problem with regression kriging using the krige command in r

I want to perform regression kriging in R using gstat. I have a SpatialPointsDataFrame which is of this form: After I have run my glm model, in order to see which variables are statistically ...
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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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1answer
43 views

Error executing kriging in modelbuilder

I'm doing an interpolation using kriging in Modelbuilder, my model is this: Every time I run the model it says: ERROR 010092: Invalid output extent. Failed to execute (Kriging). Why does this ...
3
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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 ...
3
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1answer
175 views

Strange spatial interpolation results from ordinary kriging

I'm using Ordinary Kriging to interpolate a set of spatial data. I'm working on different sets which represent different days of measurement. I get good results, apart from one specific set. Will post ...
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2answers
104 views

Kriging values greater than the most extreme value of the input layer?

I'll admit I don't understand kriging to the fullest. Yet, I've read that the weights should add up to 1 as in IDW and Natural Neighbors. However, surrounding the biggest elevation points of my ...
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1answer
80 views

Unit of measurement from standard error prediction map

I am performing an ordinary kriging analysis and came out with the prediction standard error map. I would like to know the units of such map. Can anyone help me?
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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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53 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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75 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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1answer
81 views

Setting lower and upper limits to classes in kriging interpolation, ArcGIS

I am using the kriging interpolation tool. I included two dummy values within my dataset:- an upper limit and a lower limit. I ran the tool in arc map 10.1 software. However, I want to change the ...
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49 views

Error of memory for vector allocation while kriging [duplicate]

When I run the krige.conv function from the geoR package in R: kc <- krige.conv(as.geo,loc=prd.loc,krige=krige.control(cov.pars=c(0.29,0.79))) it throws me the following error: Error: cannot ...
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1answer
73 views

Interpolate value at a specific point using kriging

Is it possible to interpolate the specific value at a point using the Kriging tool in the spatial analyst toolbox? If not, then, how can this be done in Arcgis? To my knowledge, Arcgis only produces ...
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121 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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62 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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2answers
59 views

Isolation and interpretation of vineyard multispectral data

I have 3 band multispectral raster imagery over a vineyard from which i have created a number of indices e.g. NDVI. The data is fairly high resolution (5cm/pixel) so shows a lot of along vine and ...
5
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1answer
146 views

Kriging to calculate forest biomass?

I am trying to create biomass map using Kriging from ground sample point. I have about 150 and 53 point plot for dense and sparse strata. The data is not normal so I have transformed it. After ...
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1answer
55 views

Selecting different field in attribute table for kriging in ArcGIS for Desktop?

I have created a shapefile with several columns of data in the attribute table but I can not select any of the columns for a kriging except the 4 required to display (lable, northing, easting, ...
3
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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 ...
3
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137 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 ...
2
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1answer
224 views

Kriging inside a PostGIS database?

I use a PostGIS database with temperature data. I want to use a spatial interpolation method but not the supported IDW method. I need to use kriging, but it is not part of the supported interpolation ...
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1answer
64 views

Error: KrigingModelOrdinary not defined in python

Here is the code: rasterKrig = "run{}_Krig_{}".format(counter, field) outKrig = arcpy.sa.Kriging(Stations2010o3Data__2_, field, KrigingModelOrdinary, {2}) outKrig.save(rasterKrig) arcpy.env.extent = ...
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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 ...
2
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0answers
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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1answer
78 views

Parameters for optimizing interpolation in ArcGIS for Desktop?

Is there any criteria to know the most proper parameters for an interpolation method in ArcGIS (such as, for IDW: Neighbors (min and max), sector type, semiaxis length, angle, search neighborhood)? ...
2
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2answers
136 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 ...
2
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1answer
139 views

Kriging from raster with missing data in ArcGIS

I have MODIS satellite imagery that depicts a range of surface temperatures. However, many of the cells are missing values. I think I need to perform Kriging in order to obtain an average value for ...
6
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1answer
302 views

Hex grid value interpolation in POSTGIS

I have a table of tessellated hexagons that I created as a hex binning grid to cover an area. I've then overlaid a point set to give some of the hexagons a value, see diagram:- The shapes with ...
1
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1answer
56 views

Kriging with expectation of 0, beyond the data supports

I am trying to Krige in ArcGIS from point samples of a chemical concentration. Towards the center, most of the points are larger, and on the periphery, all of the points are 0. The generated raster ...
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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 ...
3
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0answers
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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0answers
91 views

Choosing appropriate Interpolation Tool [duplicate]

I am interested in doing some fairly simple interpolation work in the next few weeks using ArcGIS 10.1. However, I am unsure about which interpolation tool is most appropriate for the task at hand. ...
3
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1answer
474 views

Three-dimensional interpolation of temperature profiles using gstat in R?

I'm working on a problem in which I'd like to interpolate a set of oceanographic temperature profiles over a three-dimensional matrix of unsampled x, y, & z locations. The data to interpolate is ...
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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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1answer
598 views

Saving kriging information from automap package in the ESRI ASCII raster format

I would like to save the information generated from an ordinary kriging (processed with the function autoKrige from the automap R package), into a file extension readable in ArcGis for desktop 9.3.1 ...
2
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1answer
166 views

Understanding the cell size argument in the kriging tool, ArcGIS

I'm not quite understanding the cell size values that a given raster has. I've been doing some kriging interpolation on very dense point data and if I leave the cell size parameter blank, it's cell ...
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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: ...