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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GRASS unable to download any extension from GRASS Addons

I'm trying to install some add-ons to GRASS, but each time I try to download an addon, I'm getting the same error: g.extension.py extension=v.autokrige ...
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0answers
20 views

what is the difference between Kriging, IDW, Spline (interpolation -ArcGIS)? [closed]

I need to know the basic difference between the interpolation tools (ARCGIS software) Kriging Spline IDW
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12 views

How to backtransform the nugget,psill,range value obtained from ordinary kriging analysis of log-transformed dataset using gstat package?

I have a dataframe contains hourly PM10 concentrations of 83 measurement sites. Please download from HERE. Using this dataset, I have fitted a model with experimental variogram by ordinary kriging. In ...
3
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0answers
26 views

Choosing interpolation method for monthly atmospheric parameters derived from AQUA/Air satellite?

I want to investigate atmospheric refraction and i am using Aqua/ Airs satellite data. These are atmospheric parameters (1) Air temperature (2) Geopotential height (3) Relative Humidity All these ...
3
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2answers
66 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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8 views

Created raster with not expected range

I have created a raster layer with kriging tool as source of data have localized sapefile attached and shown in Figure. Why the value range and are produced raster information is irrelevant to the ...
3
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1answer
322 views

Generic comparison for kriging in geoR and ArcGIS

I am going to do a project based on kriging. The targeted area would be as big as United States and my grid would be 10km*10km. I am wondering the differences of efficiencies for the methods ...
2
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34 views

Geostatistical kriging

We use soil samples data for interpolating soil fertility parameters using ArcGIS geostatistical Kriging. While doing kriging, the resultant map values ranges are not matching with our input samples ...
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3answers
244 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 ...
5
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1answer
3k views

Performing Ordinary Kriging in SAGA via QGIS SEXTANTE Plug-in?

I'm trying to learn how to apply the kriging analysis in QGIS using the SEXTANTE plug-in and SAGA tools. It appears that I have my SEXTANTE and SAGA folders configured properly according to the user ...
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15 views

Kriging results in log mode and SpatialPointsDataFrame manipulation

I've a little problem, probably because I'm not fully expert with R data manipulation. I've perfomed a kriging elaboration of mydata, in log mode, as the classical meuse example, but how can I export ...
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1answer
111 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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2answers
321 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 ...
14
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2answers
4k 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 ...
3
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1answer
130 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 ...
2
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1answer
733 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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2answers
70 views

Using kriging to extrapolate values outside of the sampling polygon

I have data points with values along 4 perpendicular transects. The kriging tool that I am currently using interpolates within the polygon created by the 4 transects, essentially a rectangle. I am ...
9
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2answers
4k views

Converting point data into gridded dataframe for histogram analysis using R?

I am very new at using GIS data and only modestly experienced with R. I've been reading about how to analyze spatial data using the spatial-analyst.net PDF book, so I'm not completely lost, but I ...
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0answers
59 views

Explaining different results from Ordinary Kriging and Universal Kriging?

When using either methods to create a surface from the same set of observations, these surfaces differ from each other. Visually it can be seen in the differences of the following contours ...
5
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2answers
542 views

Kriging method to use for rainfall?

I am working on an rainfall analysis and I have to interpolate some datas with kriging method. Is co-kriging suitable for the rainfall analysis?
2
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1answer
310 views

Plotting map resulted from kriging 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 ... $ ...
2
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1answer
56 views

Converting kriging grid to polygon?

I have an Excel file with coordinates and a measured value belonging to this coordinates. In ArcMap I can display the points and color it concerning the measured values. Since most of the values close ...
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0answers
36 views

Interpolation method for independent and dependent variables, in ArcMap? [duplicate]

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
79 views

Visualize smoke dispersion by interpolating point data [closed]

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
105 views

Error executing kriging in modelbuilder: 'invalid output extent'

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 ...
2
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0answers
64 views

Run kriging in ModelBuilder with various shapefiles

I need to run kriging in a model, using 5 different 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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0answers
29 views

Keeping the z-statistic while kriging 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 to update the z-value field, the ...
1
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1answer
92 views

Example of simple kriging with varying local means in R

I'm looking for an example of how to use simple kriging with varying local means in R. I've tried google, a few books (for example Aplied Spatial Data Analysis with R) and I've found almost nothing. ...
2
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2answers
141 views

Indicator Kriging and cokriging using ArcGIS Geostatistical Wizard?

I have a map of vegetation in 1913 for a particular landscape (approx 35,000ha), of which I have data for just short of 60% of the landscape. The limited visibility is due to the coverage being ...
1
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1answer
748 views

Saving output 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 ...
3
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0answers
82 views

Interpreting Global Moran's I and should I krig?

I am trying to weigh up if kriging (or cokriging) the residual error from my model is a valid approach. My first step was to compute whether the error is spatially autocorrelated. I have done this ...
1
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1answer
82 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 ...
3
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1answer
77 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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21 views

Weird interpolation “bug” - Arc Geostatistical kriging, lower bound > upper bound [duplicate]

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
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1answer
31 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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1answer
78 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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1answer
70 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
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9answers
15k 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 ...
3
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2answers
69 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 ...
3
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0answers
50 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
2answers
168 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
593 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 ...
7
votes
3answers
949 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
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1answer
167 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?
1
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0answers
80 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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0answers
91 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) ...
2
votes
1answer
178 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
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1answer
258 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 ...
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2answers
473 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, ...
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0answers
182 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: ...