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.

learn more… | top users | synonyms

1
vote
0answers
24 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
vote
1answer
46 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 ...
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
vote
1answer
54 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 ...
1
vote
0answers
69 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 ...
0
votes
0answers
52 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 ...
2
votes
0answers
32 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
votes
1answer
102 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 ...
1
vote
1answer
37 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
votes
0answers
68 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
votes
0answers
88 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
votes
1answer
156 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 ...
0
votes
1answer
43 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 = ...
4
votes
0answers
76 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
votes
0answers
91 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
62 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
votes
2answers
77 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
votes
1answer
90 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
votes
1answer
248 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
vote
1answer
46 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 ...
0
votes
0answers
52 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
votes
0answers
75 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 ...
0
votes
0answers
85 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
votes
1answer
260 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 ...
1
vote
0answers
399 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 ...
1
vote
0answers
19 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, ...
0
votes
1answer
413 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
votes
1answer
135 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 ...
1
vote
0answers
134 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: ...
1
vote
1answer
290 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 ...
2
votes
1answer
779 views

Calculate the values of range, sill, nugget in ordinary kriging? [closed]

I am working on temperature data, and I want to interpolate the data to any location that I specify. My programming language is asp.net4 C#. I don't know how can I determine the sill, range, nugget ...
9
votes
1answer
3k views

When to use IDW vs Kriging Interpolation for DEM creation?

I'm trying to create a DEM using point data spaced very regularly about 10m apart. The area I am interpolating is an educational facility with many flat parking lots and football fields but still has ...
2
votes
1answer
882 views

Only Interpolating within a polygon feature in ArcMap 10.1

I have sample points within a single polygon feature class that I would like to interpolate, likely using kriging. The problem is the sample points and polygon boundaries are many miles apart and ...
1
vote
3answers
97 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
77 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 ...
1
vote
0answers
44 views

problem on loading kriging outputs [duplicate]

My problem is the following: everytime i run ordinary kriging or other interpolation techniques i obtain this error message from QGIS Notice that these are the details for SAGA I would like a ...
7
votes
1answer
240 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 ...
3
votes
1answer
162 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
0answers
76 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 ...
3
votes
0answers
178 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 ...
5
votes
2answers
179 views

Spatial interpolation - appropriate method to estimate the accuracy of the surface

When using a spatial interpolation method (any method) without having a way to validate it, besides sampling some points out, is there a way to count as well with the mean distance between ...
5
votes
1answer
96 views

Can I “stack” semivariogram data?

I have several synoptic measurements (every few months) of a gravity field I would like to interpolate by kriging. Each group of measurements comprises about 45 measurement locations, and spatial ...
1
vote
1answer
158 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 ...
5
votes
2answers
279 views

Which kriging method is the best for the rainfall?

I am working on an rainfall analysis and I have to interpolate some datas with kriging method. So is co-kriging the best one for the rainfall analysis?
3
votes
1answer
230 views

Is co kriging appropriate for interpolation of three spatial co variates?

I want to estimate an interpolation model(s) for daily minimum temperature, daily maximum temperature and daily rainfall. I have samples of approximately the same size for all three variables at ...
2
votes
0answers
311 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 ...
1
vote
0answers
297 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 ...
1
vote
1answer
363 views

Keeping unchanged observed values after kriging interpolation

Is there a way to force kriging to keep unchanged measured values of observation points? For example: if the observed value of a location is 1, after the interpolation it could be 0.9 or even 0.5, ...
0
votes
1answer
224 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.
1
vote
0answers
609 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 ...