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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52 views

Search Radius for Line Density

I have been working with GIS for many years but I am fairly new to the spatial analyst side of things. I am working with many satellite tracks for many different individual animals and would like to ...
3
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0answers
32 views

Statistically comparing two sets of coordinates [closed]

I have been given a task to compare two sets of points, one set being a set of predetermined points, on the other being a set of actual points that were taken in the field. I have to compare these ...
4
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46 views

Creating forest patches from land cover layer?

I have a land cover layer from which I've extracted the tree canopy class and set all values that are not tree to NULL. I've also converted it to a vector and exploded it to make single part features. ...
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0answers
31 views

Extract mean value of a raster into a grid shape file [closed]

Hello guys I need your help I have a soil map of an island and a Grid polygon. I want to extract the mean value of the soil map to polygons squares of grid. I read this and this but Ι can't find the ...
0
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2answers
32 views

spatial relation between springs (points) and geological faults (polylines)

In ArcGis 10.1 (advanced license), I have digitized the geological faults (polylines) and the location of water springs (points). Since, relying on literature, there is a potential connection between ...
2
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0answers
24 views

How to deal 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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0answers
34 views

QGIS nearest neighbor parameter description

Could anyone explain me the following parameters, which I get by doing a nearest neighbor statistic on a point shape? I suppose that Observed mean distance is the mean distance between two points ...
0
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0answers
27 views

Metrics of change between vector datasets

I have an old and a new set of parcel data which I'm looking to compare. I'm looking to compare changes in individual parcel geometries, so boundary/corner adjustment. Currently each parcel we have ...
4
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0answers
28 views

Clusters of Same Size?

I am attempting to use the Grouping Analysis tool in the Spatial Statistics (in ArcGIS 10.2) to group state high schools (points) together based on enrollment and location. Is there a way to make ...
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28 views

ArcGIS 10: How to mask a raster by using extract by mask tool If the feature mask is larger than the raster area?

I have a problem to mask the the raster which has values ranges -0.73106217384338 - 0.94593381881714. These values have been derived by using equatin (B3-B4)/(B3+B4) from Landsat band 3 and band 4 ...
3
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0answers
64 views

Single Tree detection

I was wondering how I could extract "crown area" of single trees in a forest from a high-resolution image with only 3 band (RGB) in ArcMap. ( No NIR to use NDVI as any threshold). I need a fast ...
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2answers
31 views

How to see whether a set of postcodes have a typical distribution to the whole postcode population of UK?

For my dissertation I have a dataset of postcodes of 9984 that I am converting to coordinates atm. I looking to find whether this dataset has a 'typical or 'atypical' spatial distribution compared ...
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2answers
53 views

Calculating quantile values over a stack of images with grass gis. Help needed on r.series

I need to calculate the values for the 25%, 50%, 75% and 90% quantile over a series of rasters (time series of ndvi values from landsat). I am exploring the r.series command in Grass GIS, but the ...
2
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0answers
20 views

Trying to produce a map of Household behavior with identified explanatory variables held constant/equal

I have a map of the dependent variable, median household vehicle travel, and independent household characteristic variables, median income, mean household size and median age, aggregated to census ...
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0answers
31 views

R package spatstat: How to use point process model covariate as factor when pixel image values are numeric

I am trying to model a point process with an image covariate using the ppm() function in the spatstat package in R. I convert my raster to an im object for use with spatstat, and I run into a problem ...
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2answers
64 views

Statistical Analysis using ArcGIS

I have points containing data on temperature from 1951-2000. All data have X,Y coordinates. I have raster files in the same period. Two data sets have different data processing hence different values ...
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0answers
45 views

Implementating Analytical Hierarchy Process with ArcGIS 10.2 for Desktop?

I want to use the AHP in arcmap 10.2. I have tried using the arcscript available from http://arcscripts.esri.com/details.asp?dbid=13764 Which was designed for Arcmap 9.2. I was able to get as far ...
0
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3answers
75 views

Capabilities of the Analytical Hierarchy Process (AHP) in conjunction with the weighted overlay tool

I am making a prospective map of fossil deposits using the "Weighted Overlay" ArcGIS tool. Input factor rasters are mostly topographic in nature (elevation, roughness, TPI, etc). Initially, I had ...
1
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1answer
34 views

How to Predict demand on a bus route, considering variaton in kms and price?

If there is a route (line) modification, I mean change on distance; and also a change on the price for the user. How can I calculate the demand on the next year, considering seasonnality. What would ...
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3answers
59 views

Summarize the total area of land use polygons within map sheets - how?

I would imagine that at least some of you have encountered similar problems to mine and I´d like to hear how you solved them. I have a map sheet index (a grid as a shape file) covering a large area. ...
1
vote
1answer
89 views

Problem in creating neighbors, area and perimeter in spatial econometrics using R

I’m working on a spatial cross section model with R-programming-language. I’m running these codes which refers to anselin data (spatial_columbus) in spdep package. I found them from these links: ...
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0answers
37 views

Doing joint hypothesis test in spatial regression using R?

I'm doing estimation of spatial lag/error model using R package "spreg"/"spdep" but I cannot find any method to do anhypothesis test after regression. For example, I want to test whether two ...
2
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0answers
46 views

Spatial Autocorrelation tool vs. Incremental Spatial Autocorrelation

When you run the Spatial Autocorrelation (Monrans I) tool, you have the option of setting 'Conceptualization of Spatial Relationships'. This option isn't available for the Incremental Spatial ...
2
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0answers
89 views

How do I statistically compare positions from two track datasets?

I have two datasets with positions that I need to compare. One would be the "observed" positions (someone took the GPS positions manually) and the other one was calculated using a software. To use ...
1
vote
1answer
41 views

Help with Geographic Weighted Regression: Condo Prices

I was working on a GWR Problem in ArcGIS to figure out the potential real estate values of Condos in a city. I thought I was following everything correctly but I keep receiving the same error over and ...
2
votes
1answer
41 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 ...
2
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0answers
117 views

How to calculate the average distance among set of points as measure of closeness

I have three series (or tables) of points in PostGIS which I want to compare. I would like to know how "close" each series is when compared to the other two. In other words I would need some measure ...
4
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0answers
51 views

ArcGIS Spatial Statistics: Distance to 3rd/4th/5th closest feature

We have an algorithm which requires us to produce a score based on the distance from any given cell in an output raster to a score calculated from the distances of the 3rd closest, 4th closest, and ...
2
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2answers
48 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?
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0answers
13 views

plot shp files like pnm? (Statistical Data Analysis Explained example) [duplicate]

Weird subject? well I'm confused so in advance: sorry for this wavy question: I'm trying to do what the authors of Statistical Data Analysis Explained (ISBN: 978-0-470-98581-6) have done in figure ...
3
votes
1answer
145 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
2answers
114 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
246 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
76 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 ...
2
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0answers
59 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 ...
5
votes
1answer
166 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 ...
1
vote
1answer
79 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 ...
1
vote
1answer
51 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 ...
0
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0answers
34 views

Using GDAL and Python to replace the Spatial Analyst TabulateArea method

Has anyone tried to phase out the use of ESRI's Spatial Analyst extension by replacing it with GDAL in Python? I have a script that only uses the TabulateArea and Statistics analysis but not much else ...
0
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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 ...
0
votes
1answer
96 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
78 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
3answers
140 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 ...
0
votes
1answer
107 views

Test for spatial randomness with Ripley's K or L function in R

I have a spatial point pattern that I would like to test against complete spatial randomness. I managed to plot a Ripley's K function for my data and a function for a random distribution with a ...
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0answers
147 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 ...
1
vote
1answer
101 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 ...
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0answers
33 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
1answer
147 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 ...
0
votes
1answer
42 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: ...
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0answers
35 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 ...