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

0
votes
0answers
15 views

How to Krige with expectation of 0

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 ...
1
vote
0answers
25 views

How to determine the distribution of pollutants using marine tissue samples?--3D Interpolation [closed]

I have point data representing tissue sampling performed by NOAA NCCOS for Gulf of Maine waters. I am assuming a temporal resolution of one sampling point per location for one year. I have searched ...
0
votes
0answers
18 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
31 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
43 views

Choosing appropriate Interpolation Tool

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. ...
2
votes
0answers
60 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 ...
0
votes
0answers
157 views

What's the problem here? Kriging doesn't work

I have a point a nd 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 ...
0
votes
0answers
14 views

How can I verify 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
126 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
81 views

Cell Size of Raster Explained

I'm not quite understanding the cell size values that a given raster has. I been doing some kriging interpolation on some very dense point data and if I leave the cell size parameter blank, it's cell ...
1
vote
0answers
76 views

Labelling Kriging result (contour)

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 ...
0
votes
0answers
55 views

Calculating Lag tolerance and Lag width for experimental variogram in kriging

I need to make a formula for calculating the lag width and lag tolerance of the experimental variogram in kriging. I am programming in asp c#: double Max_X_Point=0,Y=0,Max_distance = 0,Lagdistance; ...
0
votes
0answers
60 views

Ordinary kriging in saga GIS?

I'm trying to do ordinary kriging using SAGA 2.0.8 or 2.1.0, I succesfully (I think) created the Grid System by the menu modules>>grid>>construction>>create grid system (adding it to the map there is ...
0
votes
1answer
188 views

Calculate distance between two coordinates to use in variogram calculations in ordinary kriging

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
356 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 ...
7
votes
1answer
636 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
252 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 ...
0
votes
3answers
46 views

extract data file from intepolation

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 (excell or text) from this interpolation? (this ...
1
vote
0answers
41 views

TPS and Kriging Cross-Validation

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 availabe ...
1
vote
0answers
38 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
194 views

Spatial Interpolation - defining a minimum value for agroup of points

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 ...
1
vote
0answers
65 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 ...
0
votes
0answers
111 views

Spatio-temporal prediction with KrigeST in R

I'm new in R and ST kriging, I've constructed a STFDF object with the first 4 hours historical data, and want to forecast the fifth hour data. By using krigeST in R, I've constructed vgm model. But ...
2
votes
0answers
99 views

Empirical Bayesian kriging - does data need to be normal?

With ebk, does your 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 interpolation technique for my data, or ...
5
votes
1answer
74 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 ...
0
votes
1answer
96 views

Jagged Contours ArcGIS

A general question when working with contours, do jagged lines indicate more spatial variance in a data set?
0
votes
1answer
110 views

Best interpolation tool for thickness points

I'm using Arcmap 10 and I have scattered points (denser in an area). Each point represents a thickness value. I want to get a raster from this points which I will transform in polygons ...
4
votes
2answers
182 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
0answers
150 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 ...
1
vote
0answers
187 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
193 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
230 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, ...
-2
votes
1answer
191 views

What tool(s) in the Sextante toolbox in qgis 1.8 can be used for interpolation? Kriging and spline

I have looked at every single one and can not figure out which on can be used.
1
vote
0answers
423 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 ...
2
votes
0answers
215 views

What is the correct procedure for kriging? [closed]

I'm a PhD student generating DEMs of coastal sand dunes, and I am thoroughly confused when it comes to kriging. Firstly, my DEMs are to be generated from terrestrial LiDAR point clouds with ...
1
vote
0answers
96 views

kriging Error dimensions do not match: locations xxxx data yyyy in R

I've been working (for hours) on a kriging problem. When I run an ordinary kriging model: y.ok <- krige(y~x, locations=data1,newdata=data2), I keep getting the message: Error dimensions do ...
0
votes
0answers
87 views

How to spatialy interpolate forest tree height, basal area data for certain species

I have ecological sample data collected from 5 locations within a 133345678.5678 sq meter area. The data is stored in a point shape file. I have joined tabular data with the point layer by duplicating ...
10
votes
1answer
2k 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 ...
4
votes
1answer
667 views

Interpolating Maps - Statistical Learning Techniques vs Spatial Statistics Techniques

I have recently begun experimenting with the interpolation of variales over a whole country. I have good sized training set where I have several dependant variables (continuous and categorical) ...
1
vote
1answer
136 views

Interpolated map using pca axes

I have done between group pca in R. I want to make an interpolated map using the eigen values of the first three pc axes. I want to produce a map using each of the three pc axes and finally combine ...
5
votes
2answers
632 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 ...
4
votes
1answer
655 views

book/tutorial on using rpy2 in python for kriging?

I am proficient in Python, but have no knowledge of R. Can you suggest a good tutorial in using rpy2 or any other R library to perform Block/Cokriging "Kriging"
5
votes
3answers
837 views

Kriging points in a raster 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 call interpolation with barrier. i wonder if there is something similar in r?. I ...
4
votes
1answer
1k views

How to perform 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 ...
0
votes
1answer
1k views

How to install sda4pp plugin with missing repository in QGIS

I see that the repository for the sda4pp plugin went down in 2011. Does anyone know if there is another way to download the plug-in with the repository missing? If this plug-in is no longer ...
1
vote
0answers
124 views

How to interpolate values sampled at regular time intervals?

I want to numerically integrate a set of discrete values that keep arriving at constant time intervals. Which interpolation method do I choose? how to reduce the ringing artifacts if I use cubic ...
7
votes
1answer
2k views

How to convert point data into a gridded dataframe for histogram analysis?

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 ...
1
vote
0answers
609 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 ...
1
vote
0answers
437 views

How to do Kriging using SDA4PP in QGIS?

I am trying to do kriging using SDA4PP. I have added a delimitted text layer and wish to krige that. When I try I get an error message from SDA4PP as follows... This tool requires at least one ...
4
votes
1answer
545 views

How do I implement 'weighted' kriging in R?

I'm trying to interpolate the values of an attribute (called "disease_rate") that i've sampled at a set of spatial points and i'd like to add 'weights' to the resulting kriging estimates. Basically, ...