The field of study concerning statistical methods that use space and spatial relationships (such as distance, area, volume, length, height, orientation, centrality and/or other spatial characteristics of data) directly in their mathematical computations.

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2
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1answer
65 views

Raster statistics along polygon edges

I would like to summarize raster statistics along the edge of each parcel/polygon in a shapefile. For each parcel shown below in yellow, I would like to calculate the average, min and max value of ...
0
votes
1answer
56 views

Error when running cluster and outlier analysis

I am attempting to run Cluster and Outlier Analysis on a Shapefile Feature Class. The geometry type is a line feature class. I am receiving the following error when attempting to utilize this tool: ...
6
votes
1answer
1k views

QGIS Data Management: How to calculate Standard Deviation?

does anyone know of a way to find the standard deviation of an attribute lying within any given polygon? The plugin dialog "Join Attributes by Location" gives only the options Mean, Min, Max, and Sum. ...
7
votes
3answers
347 views

How to compare spatial patterns (crime cases vs population)?

I am looking for a way to statistically compare two spatial patterns in shape polygon data (not point pattern analysis). Let's say I have a city map divided in neighborhoods (barrios), in shape ...
1
vote
1answer
209 views

How can I choose values from stacked raster images according to location of ROI

Before I choosed ROI on land surface temperature (LST) images and obtained pixel values of LST. Now I need pixel value of another images which are stacked multi-band image. My main purpose is to ...
6
votes
1answer
1k views

R raster Package Moran's I interpretation

I am using raster package to calculate the local Moran's I . The example gives the range of Moran's I between - 1 to 2.47. On my own data I have see the value range -3.070423 - 7.228558 How can ...
2
votes
2answers
186 views

Geary's index of spatial autocorrelation

Does anyone knows If there is a way to calculate Geary's index of spatial autocorrelation on open source gis?
3
votes
0answers
168 views

How does Zonal statistics handle pixels that are on the border of the polygon?

I am using the plugin zonal statistics to calculate the sum of the raster cells within polygons. How does this plugin handle pixels that are on the border of the polygon, are those cell values ...
8
votes
1answer
935 views

Modifying Bivariate Moran's I /LISA to include self?

I am using GeoDa's Bivariate Moran's I function to examine patterns of collocation between two variables at the county level (call them A and B for now). I know that, having run the analysis I can ...
3
votes
1answer
199 views

Can I ignore very low levels of spatial autocorrelation in my data?

I have >1 million postcodes clustered in ~7000 middle super output areas for England and Wales which I'm analysing using MLwiN. I have used a multilevel model with random effects and have clustered ...
4
votes
1answer
563 views

Statistical analyses for survey against raster?

I am somewhat of a newbie to geostatistical analyses, but pretty familiar with GIS and remote sensing packages. I was wondering if anyone had suggestions on appropriate geostatistical analyses for a ...
1
vote
3answers
468 views

How to automatically get mode (modus) of a raster in ArcGIS

do you have some experience how to automatically get mode value from a raster ( value that appears most often in a dataset)? I am looking for something like "get raster properties" in Spatial analysis ...
4
votes
2answers
341 views

Identify cluster centroids

I have a data set of points which are grouped into clusters like so: I'd like to use ArcGIS or Python to create a point layer of the centroids of each cluster but I can't seem to find the right ...
1
vote
1answer
2k views

Interpreting Moran's I results

I have a sample of data taken from regions of a country! i want to test if there are any spatial autocorrelation on my data using Moran Indice test. the null hypothesis: is that there is no spatial ...
4
votes
1answer
109 views

Literature on bias in spatial weights matrix

I have a question with regard to a possible bias as a result of how one constructs the spatial weights matrix. Consider a case where one works with areal data, for instance we're interested in whether ...
5
votes
1answer
437 views

Specifying Bayesian Spatially lagged dependent (SAR) variable regression in winBUGS or Stan

I have been looking for code example on how to specify a SAR spatially lagged dependent variable regression in winBUGS (geoBUGS) or, if possible, in Stan. I mean, something of the format: Y = beta_0 ...
11
votes
2answers
2k views

Regression Model and Spatial Autocorrelation

I have used OLS and GWR for validating the dependencies between two distinct database. The Residual Square for GWR is 0.82 and thereby making it the right regression model to be used for determining ...
7
votes
1answer
258 views

Which spatial weighting function does ArcGIS' GWR use?

I am running Geographically Weighted Regression and originally was using ArcGIS to carry out the analysis until I read/heard mixed reviews about it. I have now tried a different programme to run it ...
2
votes
0answers
121 views

Geographically weighted regression for GPS tracking data

I am hoping some one might be able to help me with the following question. The study I am working on has GPS locations at 4 hourly intervals of 5 lions in 3 National Parks over roughly 2 years in ...
1
vote
1answer
55 views

Rating Randomness of Electromagnetic Conductivity (EC) Data Collected?

So we have electromagnetic conductivity (EC) data that we have been collecting over some forest ground which logs an EC value every couple of seconds. We like to see the data have nice distinct ...
1
vote
1answer
124 views

Need to calculate values for a cell based on surrounding landscape

I have a raster file with the urban development of a county mapped out (values: 1=urban 0=not urban). I also have a raster file with several blocks of forested land, each block of land has its own ...
0
votes
0answers
34 views

Applying Spatial Clustering test using R? [duplicate]

I’m very new to R so please bear with me: I have a set of area infested by a disease (AIS) annually data and I want to apply some cluster methodology to detect regions with similar (AIS) patterns. I ...
3
votes
1answer
214 views

BV LISA using PySal?

I want to run a LISA with a time series spatially lagged variable using PYSAL. I see that LISA will allow the definition of y & w but not Wy(t-k). Any thoughts how I can get the lagged variable ...
0
votes
1answer
257 views

How to calculate cumulative sum conditionally across raster?

I don't know if this is possible without coding, but I need to: Create a raster file that, for each value in the input raster, sums all pixel values across the entire extent that are less than or ...
1
vote
1answer
158 views

How to compare multiple spatial point patterns over a polygon

I have multiple point pattern distributions over the same region/polygon. Each point pattern distribution has different number of points. Here is an example of two spatial point patterns for the ...
1
vote
0answers
607 views

Lagrange Multiplier in lm.LMtests (spdep package for R)

Are the Lagrange values comparable in lm.LMtests? If both RLMerr and RLMlag are significant, would the test with the largest Lagrange value be considered 'better' at explaining the spatial ...
15
votes
3answers
4k views

Using R with ArcGIS for Desktop (without using GME)? [duplicate]

I am trying to learn R generally and making statistics for maps. I found some useful tricks for making maps with it but it is not the best you can do. My everyday GIS program is ArcGIS. How I can use ...
1
vote
1answer
184 views

How to do point-to-point near analysis conditional on common attributes of the two layers in Arcgis 10.2 (advanced)

I am measuring the closest straight distance from cities of interest (in a layer) to their capital cities (in another layer). Basically, distance between a city and a capital city is calculated if ...
1
vote
1answer
376 views

Do I need to run regression in each samples separately?

I'd like to do smooth NDVI image by regression analysis; response of time series NDVI image to Julian date to represent the seasonal changes in NDVI as a function of Julian day. The time series NDVI ...
3
votes
1answer
708 views

Geographically Weighted Regression and categorical values leaving blank values after analysis

I am using Geographically Weighted Regression (GWR) in ArcMap 10.2 to look at the effect of environmental and human factors on lion occurrence in Namibia. I created a vector grid over the study ...
1
vote
0answers
39 views

Analyse effect of groups on raster maps

I work with a mechanistic model that uses climate data to simulate some specific output for different time steps and spatial locations. Now I want to investigate the effect of different climate data ...
0
votes
0answers
50 views

Calculating raster values from center to edges to represent normal distribution

Edit for simplification/clarification: What I want to do is take a raster and calculate cell values from center to edges such that the center has an arbitrarily determined high value which decreases ...
-1
votes
1answer
2k views

How to export raster value into excel or ASCII [duplicate]

I'd like to get all pixel values of time series NDVI image to find regression coefficient to smooth the abnormal NDVI value through the time. So that firstly, I want to export values of raster into ...
0
votes
1answer
73 views

Is there any method to choose the value of each pixel according to land cover

I have 2 images; one is land cover image (imgA) and monthly mean temperature image (imgB). I'd like to choose value of each pixel from imgB corresponding to imgA. WhaT I expected is each pixel of ...
0
votes
0answers
232 views

What does “unsupported bin funcion type” error in ERDAS mean?

I want to open a set of .img files in ERDAS which are output files of zonal statistic function in ARCGIS. Before running the function, all images can be opened in ERDAS. After calculating zonal mean, ...
1
vote
0answers
112 views

Getis-Ord GI and Moran's I when interested in clustering of data values not points

I have a dataset with many clustered (often coincident) points, each of which contains data. I am not interested in the fact that the points are obviously clustered. I would like to know whether the ...
7
votes
1answer
355 views

How can I conduct Geographically Weighted Analysis using an exponential decay function?

I have some points (representing 30 study sites) and I want to calculate the weighted mean of several variables (landscape layers) using a negative exponential decay (weights function) to give more ...
1
vote
0answers
151 views

ArcGIS Grouping Analysis Error

I am trying to run the Grouping Analysis tool from Esri's ArcGIS Spatial Statistics/Mapping Clusters toolbox. I have run the tool successfully on the same input layer using a different spatial ...
0
votes
0answers
143 views

How to output visually correlated clusters using Morans I Spatial Autocorrelation?

How do I use Morans I to output visually correlated clusters? I can seemingly generate statistical data, but not one that I know how to visually output on a map. I'm trying to run a morans I ...
3
votes
1answer
229 views

How to calculate “stop points” from a set of GPS tracklogs?

I have a set of GPS tracks pertaining to a cycling event that happened in the same day. I don't have much geographical information about the event itself, except for the tracklogs I downloaded from a ...
4
votes
1answer
626 views

Do SAS Bridge to Esri and SAS/GIS extensions add value to Spatial Analyst and Spatial Statistics?

My organization uses SAS extensively, but has been increasing GIS use and capacity recently (that's why they hired me). I was asked to evaluate the two SAS GIS extensions Bridge to Esri and SAS/GIS. ...
1
vote
2answers
88 views

Finding routes in which more than one car passed (gps data)

I'm using ArcGIS 10.1. I have point GPS data of routes of several cars over a few days, and I want to find only the routes where more than one or two different cars passed through (Each GPS points ...
1
vote
0answers
139 views

Statistically compare two density maps?

I (will) have a modelled distribution and an observed distribution of animals. If I were to interpolate these position datasets to reflect some density distribution (perhaps using a kriging ...
5
votes
3answers
649 views

Comparing choropleth maps statistically

I have several sets of choropleth maps showing ranges of poverty by census tract, each using a different poverty measure. All of the maps use the same categorical ranges to define poverty status. The ...
0
votes
1answer
32 views

help identifying the right spatial analysis tool

Let's say I have a set of N towns and a road network that connects the towns. I think some towns might an influence on other towns because they meet some criterion. I have a binary indicator of this ...
3
votes
3answers
2k views

How to get count of non-NA raster cells within polygon using R

I've been running into all sorts of issues using ArcGIS ZonalStats and thought R could be a great way. Saying that I'm fairly new to R, but got a coding background. The situation is that I have ...
5
votes
0answers
100 views

Estimation of values for unsampled points

I want to measure biomass on a coastal mudflat. I can only access points inside the polygon. Are there any methods available that would allow me to estimate values of the points outside of the ...
2
votes
1answer
351 views

GIS Analysis - best way to combine and display demographic data?

I am currently undertaking a demographic research project for my employer. We have the data on income, age, sex, language, transport etc and I have mapped most of it and created some thematics of said ...
1
vote
2answers
3k views

What to do when raster cell size is larger than zonal vector feature in order to collect statistics?

I am trying to extract the mean cell values for a raster dataset based on a survey grid polygon feature using ArcINFO 10.1. The cell size of the raster dataset is about 4 times the size of the survey ...
1
vote
0answers
55 views

What are problems & biases stemming from mathematics behind using Monte Carlo Markov Chain to make heatmap?

My buddy and I are using Monte Carlo Markov Chains to make a heat map - in the interest of rigour, and out of curiosity: "What are the problems & biases that stem from the mathematics behind ...