Questions tagged [geostatistical-analyst]
Geostatistical Analyst is an ArcGIS Desktop extension, that provides a suite of tools for spatial data exploration and surface generation.
81
questions
0
votes
1
answer
74
views
Using ArcGIS geostatistical wizard for Kriging in ArcPy
In ArcMap , I have many interpolations to create and need a way of doing batch processing. I would like to use Universal Cokriging for interpolation. I have point features in a regular 0.25 arc deg ...
- 197
1
vote
0
answers
19
views
Using Geostatistical Analyst Explore Tools in ArcGIS Pro
Does anyone know where the Geostatistical Analyst Explore Tools are in ArcGIS Pro?
I just can't find them. There's an option for seeing some of them by right-clicking the interpolated layer but it's ...
- 27
1
vote
0
answers
49
views
Changing value while converting Geostattistical layer to raster using Geostatistical analyst
I using geostatistical analyst for interpolation. when geostatistical layer create and I want to export it to the raster the range of min-max values changes. how could I export GA layer to raster ...
0
votes
0
answers
10
views
ArcGIS Geostatistical Analyst variogram lag pairs
I am using the Geostatistical Analyst extension in ArcGIS Pro v2.7.
Is it possible to see the number of data pairs that are used to estimate the semivariogram point for each lag?
If so, can this ...
0
votes
0
answers
371
views
Co-kriging in R
I am trying to do co-kriging for my rainfall with arsenic data. Arsenic is a target variable. I have used the code below to generate an interpolation grid, but I was not able to generate the co-kriged ...
- 11
0
votes
0
answers
21
views
Geostatistical Modelling / What is the right model for my data?
I try to find a model for my data. I explored OLS regression models but I just get an R² of around 0.18 and I think I should not go with that. I also noticed that my data could be better modeled with ...
- 21
-2
votes
1
answer
90
views
Extracting time series trend analysis parameters from kriging using ArcGIS (versus R)
A grad student has asked me a question about extracting trend parameters for a time series of data using ordinary kriging ArcGIS tools. I'm not an expert in the spatial statistics options of ArcGIS, ...
- 19
-1
votes
1
answer
115
views
How maxent's algorithm uses data to predicte distribution of species
Using the same list of occurrences with present and future bioclimatic variables (worldclim) I get two obviously different distributions. In the case of the future projection, I assume that the ...
- 491
8
votes
0
answers
124
views
How does Empirical Bayesian Kriging of ArcGIS Pro handle sampling bias?
In ArcGIS Pro, simple kriging approaches allow you to de-cluster your data before applying a normal-score transformation. According to the Esri guideline, normal-score transformations are only ...
- 91
1
vote
1
answer
28
views
Setting extent of Geostatistical Layer for further Export to Grid using ArcPy
I am writing a script to create JPEG interpolational maps using Geostatistical layer (calculated on RadialBasisFunctions).
I have a point-feature file which I use to create this GA Layer. There's a ...
0
votes
0
answers
50
views
ArcGIS Extract Values to Table crashes
I am running the Extract Values to Table tool from the Geostatistical Analysis Toolbox in ArcGIS Desktop 10.6.1 on Windows 10.
My inputs are a polygon layer with ~70.000 polygons and a raster layer ...
- 944
1
vote
1
answer
53
views
Iterating through table for IDW says parameters are not valid?
I have a table with precipitation data from 5 weather stations and I am trying to iterate through the table to perform IDW on each field (month of precipitation).
import arcpy
from arcpy import env
...
- 43
1
vote
0
answers
20
views
Other way to see average standard error in cross validation between model for geostatistical layer?
Is there another way to compare average standard error in geostatistical wizard between model type? It seem not relevant to generate one by one the geostatistical layer to compare each model type just ...
- 11
1
vote
1
answer
73
views
Estimation value of simple kriging are constant in geostatistical analyst (ArcGIS)
The objective of my study is to compare the accuracy of the model SK (simple kriging) and OK (ordinary kriging). When I use OK to apply on my data, there is a little bit variation on the prediction ...
- 11
1
vote
0
answers
162
views
Using convex hull for interpolation of individual plots or lump plots together in ArcMap?
This question is inspired by Using kriging to extrapolate values outside of sampling polygon in ArcMap?
I'm working on a project trying to understand the lasting effects of historic scientific ...
- 61
1
vote
0
answers
35
views
Value changes while converting Geostatistical layer to grid using ArcGIS Geostatistical Analyst?
I'm trying to export the GA layer (krigging interpolated temperature data) to raster. While converting, the data range is getting changed in the resultant raster (max and min) as indicated in the ...
- 29
2
votes
2
answers
708
views
Making data table using linear kriging interpolation with variogram in R
I have a table of data with such structure:
longitude_for_data = c(32,68,89,145,176, -14, -42)
latitude_for_data = c(22,98,21,13 , 16,-134,-102)
Z_for_data = c(30,40,60,70 , 20, 40, 100)...
2
votes
0
answers
298
views
Error in Universal Kriging using gstat package in R [closed]
I am trying to perform universal kriging in R using the gstat package and running into the following error:
krige(formula = CDD_LT_stC ~ Imperv1km + Elev_new, locations = sp.cal_data, newdata = sp....
- 21
0
votes
1
answer
319
views
Which is the model semivariogram for binary data?
I have a binary data (1,0) to calculate spatial distribution of soil bacteria. I have to use indicator kriging (presence/absence) and fitting model of semivariogram. Then, which is the model ...
3
votes
1
answer
302
views
What is a relevant geospatial modelling approach when no spatial autocorrelation is found?
Although I have found on StackOverflow all answers I ever had on GIS matters using R, ArcGIS and QGIS in the past, I am currently faced with one question I can't find an answer to online.
For my ...
- 39
1
vote
1
answer
40
views
geostatistics across different projections?
What are some best practices for calculating local geostatistics across the boundaries of different projections?
I am thinking of using the State Plane Coordinate System to represent a national-...
- 243
2
votes
2
answers
376
views
Kernel Interpolation with Barrier
I am trying to use the 'kernel interpolation with barriers' tool in the Geostatistical Analyst toolbox of ArcGIS 10.3. My data consists of 600 marine animal relocations, and I am trying to calculate ...
- 459
3
votes
1
answer
1k
views
kriging vs cokriging
I am attempting to interpolate sediments across an area with data from 3 sources using ArcGIS 10.3.
All three sources divide sediments into percentages of mud, sand or gravel.
Two sources come ...
- 235
0
votes
1
answer
281
views
Surface analysis with R - Shape recognition
I am trying to analyse a geological surface with R & Python and I would like to know if there are some ways to distinguish, divide and quantify repetitive structures such as advertised by a ...
- 105
2
votes
0
answers
63
views
How to create a surface area that interpolates and visualizes trends in physical activity in ArcGIS?
I have a dataset that contains several hundred telemetry points for my focal species around twilight hours. Attached to these points are mean values that represent how active the animal was 10 ...
- 117
1
vote
0
answers
70
views
Rule of Thumb for setting smoothing parameter
I'm trying to model some binary data (disease infections) using indicator kriging in the Geostatistical Wizard in Arc 10.3. For presentation purposes I'm using the smoothing option. Is there a rule of ...
1
vote
0
answers
234
views
How to test for correlation between two point data sets
I want to determine if there is a correlation between weed plant species density and habitation (buildings).
Both data sets are points. The weed species has an 'abundance value' (i.e., one point may ...
0
votes
1
answer
2k
views
Geostatistical Analyst toolbar options not accessible
I am trying to perform cross-validation for a Kriging interpolation I did on my dataset. For this I wanted to use the Geostatistical Analyst Wizard in ArcGIS Desktop.
I have the Geostatistical ...
- 435
1
vote
0
answers
303
views
Converting raster into geostatistical layer? [closed]
I have downloaded a raster surface (SRTM) with pixel size equals to 30*30, and I want to use that surface as a geostatistical layer for further analysis. Is there any available tool that converts ...
- 93
2
votes
2
answers
547
views
What does 'Weight Field' in IDW interpolation mean?
I am trying to figure out how the Weight Field option of Geostatistical Analyst IDW in ArcMap 10.3 works.
On IDW - ArcGIS Desktop Help I can find just this simple explanation:
Used to emphasize ...
- 29
1
vote
0
answers
80
views
Cross-validation error threshold in ArcGIS
I'm learning the Geostatistical Wizard toolset in ArcMap 10.4.1 and I am performing the cross-validation step in an IDW interpolation.
I have done some research regarding the process of cross-...
- 115
1
vote
2
answers
6k
views
Create groundwater contours in ArcGIS
I'm trying to determine a way to accurately produce groundwater contours in ArcGIS. The industry standard is using Surfer to construct the contours from monitoring well data. I would imagine ArcGIS ...
1
vote
1
answer
245
views
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, ...
- 141
1
vote
1
answer
182
views
Areal Interpolation - Error 40066 - cannot distinguish between polygons
I have data for some countries but not for others and would like to predict the missing values from neighboring countries weighted by their area, distance etc.
To do so, I am using the geostatistical ...
- 395
2
votes
1
answer
120
views
Creating subset for doing Co-Kriging interpolation and Crossvalidation?
I have a data set with only 47 soundings, so a small amount of data available. With this information I am trying to produce a raster surface through interpolation. Unfortunately, a data analysis ...
1
vote
0
answers
216
views
Land cover generation
I am working on a river watershed on QGIS and I need a land cover map.
I have a good raster of land use data with 15 m resolution for year 2015, but it covers around the 90 % of the basin.
I have ...
- 485
2
votes
0
answers
103
views
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 ...
- 105
1
vote
0
answers
280
views
Understanding semivariogram model in ArcGIS; difference between Binned points and Average points?
I am sorry if I am unaware of some very basic ideas of semivariogram. I am trying to understand the difference between binned points and averaged points. In this [document] (http://desktop.arcgis.com/...
- 25
3
votes
1
answer
687
views
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 ...
- 140
2
votes
0
answers
76
views
Analysis method for Vegetation category change [closed]
I have a data set showing vegetation change over a 100 year period. The data is categorical (ie. Conifer, Deciduous, Mixedwood, Grassland, Shrub, Open Canopy forest, non vegetated). Each cell in my ...
- 342
2
votes
2
answers
340
views
Getting similar IDW results using Spatial and Geostatistical Analysts for spatial interpolation of data with many zeros?
My data are plant biomass data from hundreds of sites. Most sites have zero biomass; these zeros are real. Thus, my data violate most assumptions of geostatistical interpolation methods (confirmed ...
- 63
3
votes
1
answer
4k
views
Doing spatial correlation between two layers on ArcGIS?
I have two datasets and I'm trying to determine the extent of their spatial relationship. I suspect they are closely related but I would like to produce a map output to illustrate this relationship.
...
- 41
1
vote
0
answers
628
views
Calculate spatial GINI coefficient for land use
I am interested in calculating an index of agricultural land inequality for Brazil. I'm thinking that a GINI coefficient would be a good approach given traditional uses of GINI. I have a data set for ...
- 771
5
votes
1
answer
204
views
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 ...
2
votes
1
answer
2k
views
Difference between Spline (spatial analyst) and Geostatistical Analyst? [closed]
Why the interpolation result of Spline with Tension in the Spatial Analyst is different from the that in the Geostatistical Analyst (both in ArcGIS 10), including their minimum values, maximum values, ...
- 69
4
votes
1
answer
655
views
Does IDW interpolation in ArcGIS Geostatistical analyst work as exact interpolation method?
As we know, Inverse distance weighted (IDW) is an exact interpolation method, which means the interpolated values of the known samples should be the same with its original observed values. But when I ...
- 69
2
votes
1
answer
409
views
ArcGIS method for declustering a spatial dataset?
I have previously asked this question but perhaps was using the wrong terminology. I would like to run some type of cell declustering on a spatial dataset. Is there a tool for doing this in Arc? ...
- 621
1
vote
1
answer
157
views
arcpy.SubsetFeatures_ga output not saving in correct feature dataset
I am using SubsetFeatures_ga to create a random dataset within a file geodatabase and am trying to save the output feature class in a feature dataset but it keeps getting saved in the root of the file ...
- 303
1
vote
1
answer
1k
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. ...
- 826
1
vote
1
answer
55
views
How to create dynamic point_coord variables for Neighborhood Selection?
I'd like to us the arcpy.GANeighborhoodSelection_ga in a loop where the point coords would come from a different source. What I tried already:
If I define the coords, it works:
pointcoord = "689383....
- 540