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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0
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2answers
166 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 ...
7
votes
4answers
19k views

How to convert zip codes to latitude and longitude?

I have a data set that includes a list of zip codes. Is there a way in R to convert these zip codes to latitude and longitude coordinates?
2
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1answer
381 views

How to interpolate GPS data correctly?

I'm working on a project that involves using linear interpolation to fit lines to lat/lng points. I'm pretty new at scientific programming related stuff, and I was wondering if people could steer me ...
4
votes
0answers
90 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 ...
13
votes
2answers
3k views

Using R with ArcGIS Desktop

In response to comments below, a re-phrasing of the question. I've used the integration of R with QGIS, and found it a very uesful tool. Having taken a look at the R toolbox extension for 9 and the ...
3
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0answers
65 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 ...
1
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0answers
77 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
49 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 ...
3
votes
0answers
92 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 ...
1
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0answers
55 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 ...
10
votes
2answers
3k views

Is there a Free Aggregate Points tool out there for ArcGIS 10?

I need to do some Getis-Ord analysis but first I need to aggregate my points. I know of XToolsPro, but the aggregate points function is locked and you must purchase a license to use it. I am ...
1
vote
1answer
38 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 ...
0
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0answers
29 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 ...
5
votes
0answers
49 views

Clusters of Same Size? [duplicate]

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 ...
1
vote
0answers
60 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
votes
0answers
108 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 ...
1
vote
2answers
35 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 ...
2
votes
2answers
110 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 ...
6
votes
3answers
282 views

What are the most efficient Geographic Weighted Regression packages?

What are the most memory efficient open source packages for calculating a geographically weighted regression (GWR)? I am in a situation where I need to do a geographically weighted regression on a ...
2
votes
0answers
25 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 ...
1
vote
2answers
91 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 ...
0
votes
3answers
252 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 ...
2
votes
1answer
140 views

What are the geometric principles and GIS techniques that I can use to generate a postcode coverage of my city at street scales?

Postal codes of Brazil and another countries are oriented to distribution logistics, and improvement of reliability in writing the postal addresses; but without much concern for the spatial ...
1
vote
1answer
175 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: ...
0
votes
0answers
73 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
votes
0answers
70 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 ...
8
votes
2answers
2k views

How to Find the Average Raster Value of an area defined by a shapefile using R?

I have a set of raster images which represent a specific month over the years, and I want to make a timeline of the average values of an area using a shapefile. How do I extract the values from the ...
2
votes
0answers
115 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
45 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
49 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
44 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: ...
5
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
264 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 ...
3
votes
0answers
209 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 ...
1
vote
1answer
156 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 ...
5
votes
1answer
625 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
83 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?
15
votes
7answers
3k views

Best spatial statistics software for GIS?

I am searching for spatial statistics software which has many powerful features and supports a GIS interface. Can anyone give me some advice?
0
votes
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
0answers
152 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
580 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
156 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
480 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
204 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
147 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
502 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
90 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
225 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 ...
0
votes
1answer
210 views

Conducting geographically weighted regression on a raster

I have a relatively big raster file on which I want to conduct geographically weighted regression. Size of raster ~ 2 GB and number of rows is around 100,000 One way might be to convert from raster ...
11
votes
2answers
908 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 ...