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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Determining covariance of irregularly spaced spatial data in R?
I'm comparing concentration C of a contaminant in the same spatial region at two time point 2000 and 2010 with sample size of N_2000 = 51 and N_2010 = 26 (not all the samples are from the same ...
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Interpolating (kriging) in ArcMap?
I would like to interpolate with kriging data points from one shapefile that should fill out the Space of another shapefile i am using as a boundary.
I have set this boundary under Geoprocessing --> ...
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Converting point kriging surface to small polygon data set?
I have a dataset showing soil samples as points and the nutrient contents at each of these sample locations.
I have created an interpolation surface that represents the distribution of nutrients ...
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Should I Krige my contour data or use a different interpolation method?
I am using QGIS to calculate the terrain slope, starting from vector contour line data. Using linear interpolation like r.surf.contour gives me a reasonable looking DEM, but is not really useful if I ...
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Predicting missing data of DEM
I am working with AWD3D-30m DEM which has many gaps (missing values). Can I utilize an older ASTER or SRTM DEM to predict that? Please answer in detail on what techniques to adopt.
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Getting around no data places on Kriging in ArcGIS Desktop?
I'm working with a natural vulnerability research, using a methodology that interpolate data from a high number of wells (around 600) to create a map of the vulnerability of the area.
Following the ...
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Kriging predictions for presence only data with Maxent
I was doing some geostatistical analysis (variogram+kriging) for a "presence only" type data in a species distribution modeling context. Since, we know that when estimating the (empirical) variogram, ...
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Creating DEM from points, contours and drainage network using Kriging interpolation In ArcGIS Spatial Analyst? [closed]
How to create DEM from points, contours, and drainage network using a kriging interpolation?
The scanned topographic map, with 300 dpi resolution,was georeferenced and manually vectorized using ESRI ...
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R 'gstat - Warning: singular model in variogram fit
I am trying to perform a kriging interpolation. But when it comes to the point when i want to fit the variogram to the model I get the following warning:
In fit.variogram(vario, vgm("Sph")) : singular ...
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Understanding regression function output in ArcGIS Kriging?
Below is "regression function" output in ArcGIS Kriging.
I'm assuming the first value is my r2, but does the 2nd value represent error rate, residual, or something else?
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Interpolating (kriging) using only subsets of data points in QGIS
I'm working with county level data where I'm using ordinary kriging in QGIS 2.14.2 Essen (SAGA plug-in for reference) to characterize a point data in each county. The problem is that I don't want data ...
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Variogram model - SAGA on QGIS Processing
QGIS 2.14 (Win) comes with SAGA 2.12, which Ordinary Kriging supports 6 variogram model options.
However, if I run SAGA Ordinary Kriging from QGIS Processing Toolbox, there is no drop down menu. Only ...
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R gstat krige() - Covariance matrix singular at location [5.88,47.4,0]: skipping
When I want to perform the kriging it only works sometimes, depending on what values I use in my datatable. As a result of the krige function I get for var1.pred: NA NA NA ... and var1.var: NA NA NA .....
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Inverse distance weighting variable search radius based on third variable [closed]
I am trying to perform inverse distance weighting (and possibly kriging), but want to base the search radius on a third variable:
high population density -> small search radius
low population density ...
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Output raster from geostatistical layer to match template raster: why is there an extra row of NoData cells?
I have a geostatistical layer created using ordinary kriging and the Create Geostatistical Layer tool in Model Builder. I am trying to output this layer to a raster that matches a target raster using ...
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gstat's krige.cv() error: "Error: dimensions do not match:"
I am using krige.cv() for cross validation of a data set with 1394 locations. In my code, empirical variogram estimation, model fitting, and kriging (by krige()) everything works fine. But when I use ...
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Performing Kriging in QGIS
Does anyone know how to perform kriging in QGIS? and not via SAGA but actually in the program itself.
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Interpolating Temperature over Elevation on ArcMap
I need 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 Co-Kriging, however I have ...
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Gstat krige() error: Covariance matrix singular at location [917300,3.6109e+06,0]: skipping
Recently, I am facing a strange problem when using krige() in gstat library. This error was not there a few months ago because I am using the same code with the same data that I successfully used ...
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Rpy2: how do I use the function 'as' (r library methods) in python?
I want to coerce an object of class Raster Layer to class SpatialPixelsDataFrame since that is required as input for the function autoKrige from the r library automap.
However, when I try to use as ...
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Sample Design for Kriging [closed]
I am taking soil samples on an agricultural plot and will be using the results as input to create a semivariogram for kriging in ArcGIS. This plot features raised planting beds in which the test crop ...
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R: how to export my Kriging result to raster? [duplicate]
I want to export results of my Kriging calculation to raster or some other format. My aim is to take this converted file and intersect it with another SpatialPointDataFrame (location of the point ...
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Error in In predict.gstat in R
I am trying to do kriging by gstat package through R.
Here is my Code:
krg<-krige(var ~ 1,data,grid,model=vgm,nmax=30)
But each time I recive this warning:
1: In predict.gstat(g, newdata = ...
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Creating SpatialPolygons in R
I am trying to do kriging with my data. But there is a problem here. I want to use krige command in gstat package. But I do not have "Spatial object with prediction/simulation locations".
How I can ...
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Ordinary kriging problem after exporting to raster (Geostatistical Wizard)
I'm not sure what I'm making wrong. I used the Geostatistical Wizard to perform an ordinary kriging. The resulting Geostatistical Layer looks like this:
After using the GA Layer To Grid Tool by right ...
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R kriging in QGIS
I'm trying to work with the R Kriging script in QGIS (processing toolbox). I have installed R before directly to C:. I also have installed the packages raster, rgdal, sp and automap. When I'm starting ...
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How to interpolate (ordinary kriging) large files with QGIS processing
I'm using the Saga ordinary kriging tool as apart of different processing models. The biggest issue I have is the very slow performance. My point shape files have mostly more than 200.00 points (some ...
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Interpolating logarithimic values - groundwater pH
I am using Spatial Analyst to interpolate surfaces for several groundwater parameters based on point observations at monitoring bores, including groundwater level and pH.
It suddenly occurred to me ...
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Creating pooled variogram in gstat
I am currently using gstat to perform ordinary kriging on daily fields of some variable - that is a new variogram is fit for every daily set of observations.
I would like to compare this with ...
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Spatio-temporal kriging - useful if not interpolating to new time points?
I have data measuring a variable Z say at several locations on a fixed network (each location at a fixed longitude and latitude). values of Z are measured daily at the same time.
At the moment I am ...
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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 svnurl=http://svn.osgeo.org/grass/grass-addons/...
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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 ...
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Understanding ArcGIS 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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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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Using kriging to extrapolate values outside of sampling polygon in ArcMap?
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 ...
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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 (...
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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. ...
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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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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 ...
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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 ...
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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 ...
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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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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 ...
$ ...
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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. ...
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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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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 ...
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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 ...
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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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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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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 ...
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