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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2
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1answer
35 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 ...
0
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0answers
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 ...
0
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0answers
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) ...
2
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0answers
34 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 ...
1
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0answers
36 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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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 ...
1
vote
1answer
17 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. ...
2
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0answers
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 ...
0
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0answers
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 ...
2
votes
1answer
49 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 ...
1
vote
1answer
22 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 ...
32
votes
9answers
13k views

Open source methods for kriging?

I have a point dataset which I'd like to Krige, ideally using an open-source software package. If possible, I'd also like to choose the semi-variogram model during the process to improve the ...
2
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0answers
42 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 ...
2
votes
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 ...
0
votes
1answer
42 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 ...
1
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0answers
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 ...
3
votes
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 ...
3
votes
1answer
168 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 ...
3
votes
2answers
100 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 ...
2
votes
1answer
572 views

Ordinary kriging tools available in ArcGIS?

I have been using Geosoft's Target to interpolate X, Y coordinates then use them to create grids using ordinary kriging. I am now working with ArcGIS which I am new to and can't seem to be able to ...
6
votes
3answers
845 views

Spatio-temporal block kriging with R package gstat?

In the documentation of sp I saw that the coords argument of the SpatialPolygons function only accepts 2 columns. Is it not possible to create 3-dimensional polygons? I am doing spatio-temporal ...
1
vote
1answer
77 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?
0
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0answers
50 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 ...
1
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0answers
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) ...
1
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1answer
124 views

Cross-validation of TPS and kriging outputs from the fields package in R

I am looking for existing package or functions that will allow me to cross-validate multiple outputs of Thin plate spline (TPS) and Kriging from the fields package. Does anyone know of any available ...
3
votes
1answer
208 views

Integrating DEM within kriging and other interpolation methods?

I would like to see the difference of including DEM in interpolation from without. Some studies on climate data interpolation suggest that interpolation performs better with DEM. How do I do this in ...
1
vote
2answers
430 views

Using ArcGIS API interpolation functions (idw, kriging, splines) in my own dataset?

Does ArcGIS API provide interpolation functions, like if I want to interpolate from my own set of values? I know that ArcGIS provides functions for interpolation like IDW, Spline and Kriging etc, ...
1
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0answers
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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0answers
63 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 ...
1
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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
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0answers
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 ...
9
votes
1answer
664 views

Kriging on GRASS+R - cannot allocate vector of size 146.5 Mb

I'm trying to do a groundwater elevation map with an Ordinary Kriging on R, but always resulting on the lack of memory cannot allocate vector of size 146.5 Mb allocation (windows xp 32bit). ...
7
votes
1answer
252 views

Interpolating points observed with different time duration

I am doing spatial interpolation with a group of points. Some points have complete observation of events: for a period of 24 hours we have observed N events in each point. These points have N ...
0
votes
1answer
233 views

Tools in the Sextante toolbox in QGIS 1.8 for interpolation?

What tools in the Sextante toolbox in QGIS 1.8 can be used for interpolation (kriging and spline)? I have looked at every single one and could not figure it out.
2
votes
1answer
417 views

Haversine formula to calculate distance between real coordinates?

I need to calculate distance between two stations in a map in order to calculate empirical variogram in ordinary kriging to interpolate temperature data. Calculating distance in kriging using ...
1
vote
3answers
173 views

Extract data to file after performing kriging interpolation in ArcGIS

For 3 meteorological stations, I created maps by Kriging Interpolation tool to extract data for other places. How is it possible to extract a data file (Excel or text) from this interpolation? (this ...
1
vote
1answer
189 views

Interpolating lots of points with seemingly good spatial density

I'm using Arcmap 10 and I have scattered points (denser in an area). Each point represents a thickness value of a simulated avalanche deposit. I want to get a raster from this points which I will ...
2
votes
1answer
164 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 ...
5
votes
3answers
1k views

Kriging with barriers in R?

I wonder if there is a way to interpolate xyz points in a raster within certain bounds using R? In ArcGIS this is called interpolation with barriers. I wonder if there is something similar in R? I ...
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
vote
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 ...
2
votes
1answer
135 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 ...
2
votes
0answers
122 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 ...
0
votes
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 = ...
2
votes
1answer
223 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 ...
1
vote
0answers
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 ...
5
votes
1answer
145 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 ...
0
votes
0answers
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 ...
1
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1answer
78 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 ...
3
votes
0answers
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 ...