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Questions tagged [kriging]

A statistical interpolation method, also known as Gaussian process regression, most used in geo-statistics. The goal is to map a surface given limited sample data. The process evaluates the variability of supplied data, then uses a weighted average of neighbouring points -- considering both distance and direction -- to interpolate the desired map points.

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Why the RMSE for Kriging is not strictly decreasing for increasing training data?

I am using gstat package for ordinary kriging and using the walker lake data (data size = 470). I have randomly taken 20 from that data in each trial and calculate the rmse for randomly chosen training dataset from 50-450 dataset. Then I have…
Chandan
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DiceKriging / Full 2nd order polynomial

The following message appears while running DiceKriging (in R) with full 2nd order polynamial (2D): Error in model.frame.default(object, data, xlev = xlev) : Variablenlängen sind unterschiedlich (gefunden für 'I(inputs[, 1]^2)') In…
NMF
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openmdao kriging surrogate claims bad data but it is not

I am trying to train a surrogate in openmdao 1.7.1 using FloatKrigingSurrogate(). I get an error message: /applications/Frameworks/Python_Frameworks/OpenMDAO/openmdao-1.7.1/lib/python2.7/site-packages/openmdao/surrogate_models/kriging.py:145:…
Clyde Gumbert
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R gstat spatio-temporal variogram kriging

I am trying to use the function variogramST from the R package gstat to calculate a spatio-temporal variogram. There are 12 years of data with 20'000 data points at irregular points in space and time (no full grid or partial grid). I have to use the…
user823
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Combining Temperature with Elevation Data

Good Afternoon, I have a burning but pressing question about the potential to overlay or create a new image file in ArcGIS that overlays temperature point data I have for California onto a 30m resolution DEM for that state. I have explored…
E. Weglarz
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Unable to properly use autokrige from automap package (R cannot read the prediction locations well)

I'm trying to use R to perform a map of interpolated frequencies of data collected from Iberian Peninsula. (something like this https://gis.stackexchange.com/questions/147660/strange-spatial-interpolation-results-from-ordinary-kriging ) My problem…
R.B
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Applying an image as a mask in matlab

I am a new user on image processing via Matlab. My first aim is applying the article and comparing my results and authors' results. The article can be found here: http://arxiv.org/ftp/arxiv/papers/1306/1306.0139.pdf First problem, Image Quality: In…
cndkrt
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Best Spatial interpolation method for regularly spaced data

I have a set of regularly spaced weather data that need to interpolate into a spatial surface. I was wondering the best spatial prediction method that can be used for this interpolation process, and software. Thanks
Paulo
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Local kriging reports error in `krigeST` with full data (`STFDF`)

I have been playing around with the krigeST function in the gstat package, and I tried to do local kriging with a full set of SpatialPolygons based data (STFDF). When I tried the following spatio_time_krige_sumProd = krigeST(conso~1, …
vermouth
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R universal kriging with autoKrige()

I'm trying to use the autoKrige() function in the automap package for a simple application of universal kriging. I have an irregularly spaced grid of measurements, and I want to interpolate between them on a fine spatial scale. Example code: …
Jonathan Denniss
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R: Bad variogram fitting, bad kriging results

I try to do a kriging in the Jakarta Bay. I have a set of measurement points with appropriated coordinates and attributes (pH, salinity,...) In order to do a kriging I first need to find a model for my variogram. When I use the "variogram" function…
ZKB
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What KInd of variogram should I plot before doing Kriging in R?

I have a csv file named seoul3112, contains PM10 concentrations. please, download..I have tried to plot sample variogram and fit a model on it. library(sp) library(gstat) library(rgdal) seoul3112<-read.csv("seoul3112.csv",row.name=1) …
Orpheus
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Linear Dependence errors in DiceKriging with linearly independent data

The Problem (with minimal working example) Dicekriging gives linear dependence errors about half the time when data is close to being linearly dependent. This can be seen by the below example which gave an error about half the time when I ran it on…
Stuart
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Variogram fit using gstat package in R

The following code is for predicting v value at three locations with the kriging method in R using gstat package. library(gstat); library(sp); walk470 <- read.table("D:/kriging/walk470.txt",header=T) attach(walk470) coordinates(walk470) =…
Chandan
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How to do kriging with polygon data? (Do not want block kriging)

I am trying to apply kriging to interpolate the air pollution concentration (target variable) When I run the krige function as below, R return an error. RSPAVE is the target variable; air is the dataset the contains the RSPAVE; TPU is the…
cyrusjan
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