Questions tagged [kriging]
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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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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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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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?
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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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Error when kriging: "output variance prediction raster" [closed]
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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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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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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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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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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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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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 ...
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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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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, ...
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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 ...
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Dealing 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 ...
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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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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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Interpolating species data from sample points in a small area [closed]
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 ...
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Missing data and negative predictions when kriging daily rainfall? [closed]
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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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)?
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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 ...
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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 ...
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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 value ...
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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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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 ...
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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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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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Error when kriging in SAGA: grid file could not be opened [duplicate]
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 ...
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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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Exporting kriging prediction map in .asc 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 (...
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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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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 ...
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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 ...
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Choosing 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 ...
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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 ...
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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 ...
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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 ...
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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 events....
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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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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 ...
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Method for estimating accuracy in spatial interpolation?
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 ...
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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 ...
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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 ...
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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?
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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 ...
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Ordinary kriging with three dimensions in R [duplicate]
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 ...
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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 field ...
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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, ...
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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.
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Validation of Regression Kriging [closed]
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 ...
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