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
69 views

Calculating total area overlapping specific raster DEM color interval whose boundaries are confined by another vector?

I know this sounds quite difficult, but maybe it isn't for you or at least it shouldn't if I explain it correctly. (I'm using QGIS 2.14) I'd like to know to calculate total area overlapping a ...
1
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0answers
26 views

Tool to determine the trend of data point positions? [on hold]

I am looking for a tool that can determine the dominate trend or maybe a histogram of trends for data point position. Basically if I have somthing like this:s. Then I want a tool that will tell me ...
0
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1answer
22 views

R: Voronoi tesselation from long/lat data?

I want to create a SpatialPointDataFrame and Voronoi Tesselation from my .csv data downloaded from EPA, available here: http://uloz.to/xboQc7cu/no2-calif-csv I convert my data in SPDF format in 2 ...
3
votes
3answers
33 views

Formally testing whether building type tends to be close to another building type?

In arcGIS 10.1 (advanced licence), I have two polygon shapefiles, each representing two different types of building (let's call them A and B). Each type is actually used for two different purposes. ...
1
vote
1answer
32 views

Nearest Neighbor Analysis for route events

I have events that are on routes. You can think of it as accidents on a highway. I want to do some spatial statistics on it. The road is an M enabled feature class and decision makers want logical ...
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0answers
9 views

How to apply Edge Correction in ArcGIS Average Nearest Neighbor

I am using ArcGIS 10.3 with the tool Average Nearest Neighbor to describe the data. I want to avoid mistakes caused by Edge Effect. In the Ripleys K Function tool there is an option to control that ...
0
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1answer
68 views

What is (if there's any) difference between MAUP and Edge Effect

I heard both the term MAUP and Edge Correction in association with Spatial Statistics, zoning/quadrats, demographics etc. Is there a difference between the two? What is the difference then?
2
votes
1answer
32 views

Average Nearest Neighbor does not have all the options

I have a point feature class that I used the Average Nearest Neighbor from the ArcGIS software to calculate the pattern. ArcGIS produces output chart that says whether the data is dispersed, random ...
1
vote
1answer
32 views

Creating quadrats in ArcGIS

Is there a tool / toolbox in ArcGIS to create quadrats on a population? I have a point feature classes with 1 billion points (divided to 10 almost equal feature classes) that I want to take samples ...
1
vote
1answer
18 views

Average Nearest Neighbor tool extreme restuls for different area?

I'm using the "Average Nearest Neighbor" tool in ArcGIS 10.3 to calculate whether my point feature class is clustered, random or dispersed. One of the parameters is area. I tried putting different ...
0
votes
1answer
19 views

Graphic output for Ripleys K function

I am using ArcGIS to calculate Ripleys K function using the "Multi-Distance Spatial Cluster Analysis (Ripleys K Function)" tool on a point feature class. I can see a table output but want a graphical ...
0
votes
1answer
20 views

How to work with Spatial Autocorrelation (Morans I) on equal weighted point

I have a point feature class. All points are the same, it's not weighted. I want to use Spatial Autocorrelation (Morans I) tool but it only takes a field for weight. I tried fooling it by adding a ...
4
votes
1answer
27 views

Standard deviation of point pattern

I am using ArcGIS software to create a Standard deviation of point pattern, and I know whether Ii need to expect a circle or an ellipse. Is standard deviation in that context always circular? And if ...
1
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0answers
21 views

Is there really random distribution of points? [closed]

I'm just wondering if there is really such a thing as "random" in geography? To me it always seems like everything has a reason: examples: vegetation does not just randomly grow whether and ...
1
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0answers
15 views

When would I use K analysis over NNA?

I'm working with the dataset Redwood (62 redwood trees in a 23^2m square). I intend to test whether these are random or not. In what cases would I prefer Nearest Neighbor Analysis and in what cases ...
1
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0answers
17 views

Calculating intensity of a 0…1 scale

I'm trying to come up with the Intensity value for the Cells dataset (Diggle 1983). This dataset has coordinates from 0 to 1, probably percent, there is no actual unit to it as I think it was taken ...
2
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0answers
17 views

transforming 0 to 1 coordinates to other measurement

I am not experienced with ArcGIS and trying to perform some analysis on using the Statistics toolbox. The dataset I'm using is the redwood dataset used by Diggle 1983. An example can be found here. ...
3
votes
1answer
31 views

Assigning the modal average based on points within a polygon

I have two layers: Survey Points Habitat Multi polygon The Survey points contain the field sensitivity I want to assign a number to each polygon based on the modal average sensitivity. This ...
0
votes
2answers
47 views

Create shapefile connecting points “as the crow flies” in R

I have a set of locations (with latitude and longitude). I know how to get the distance between these points, but I want to create a line that connects them with the shortest path ("as the crow ...
2
votes
1answer
32 views

GIS Least Cost Spanning Tree in R

Is there an R package/function that computes a least cost spanning tree given a shapefile or vector containing the latitude/longitude of each point and a raster file that contains the cost of ...
0
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0answers
28 views

Multiple raster - same extent - smallest overlapping area

Within ArcGIS (10.1) I have multiple raster files, for which I have to calculate different statistics, based on the total size of the raster. EDIT: The raster have the same extent on a coarse scale ...
3
votes
3answers
55 views

Statistical Analysis of Climate Data

I am doing a study on how a changing climate is influencing the spread of an invasive species of moth. I have climate data in the netCDF format which I have made into both rasters and point ...
1
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0answers
23 views

Running local Moran's index in all fields automatically?

I want to use the local Moran's I index in ArcGIS. I have a table/layer with 50 columns. Can I execute moran in all fields of this table automatically or do I have to run the tool 50 times?
4
votes
0answers
73 views

Which statistical methods to compare the spatial distribution of two different variables in two raster maps?

I am working with two global raster maps using the R Software (original file: netCDF for map 1 and GeoTIFF for map 2), with a resolution of 5 min of arc. Map 1 contains data on the share of the land ...
0
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0answers
34 views

Trouble shooting Incremental Spatial Autocorrelation/Hot Spot Analysis

I'm trying to do a spatial analysis of rural school closings in Brazil (ultimate objective to do OLS/GWR). I have census data from 2005 and 2014, from which I've calculated the relative percentage of ...
1
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0answers
18 views

What is the difference between spatial regimes and spatial heterogeneity?

Let me cite excerpts from the GeoDA-Gloassary (https://geodacenter.asu.edu/node/390) Spatial regimes: Spatial regimes are a form of spatial heterogeneity, which implies structural differences ...
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0answers
19 views

What to do with the intercept output from regression analsyis?

In ArcGIS I use global Ordinary Least Squares Regression (OLS) models and Geographically Weighted Regression (GWR) models to analyze the relationships between independent variables and my dependent ...
0
votes
0answers
37 views

Problems with moran spatial autocorrelation tool

I´m trying to run the Moran's I spatial autocorrelation tool but there is an error: updateParameters Syntax Error: Runtime error Traceback (most recent call last): File "c:\program files ...
6
votes
2answers
94 views

Exploratory Spatial Regression: How to limit 60 variable candidates?

I want to perform an Ordinary Least Squares (OLS) regression (global) or even a Geographically Weighted (GWR) regression (local) to identify possible causes for specific phenomena, like crime. I ...
5
votes
1answer
81 views

Categorising Point Clusters

I have a point dataset of solar farm locations. The points are grouped according to which substation they feed into (see below). I would like to test the hypothesis that electrical output ...
1
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2answers
47 views

Extract raster values around point features with kernel

I have a point layer of known landslide locations, and a raster layer (30m) of vegetation cover (categorical). My goal is to extract the prevailing raster value around the point locations. Almost all ...
2
votes
1answer
81 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. ...
3
votes
1answer
222 views

What algorithm does QGIS use to calculate Nearest Neighbor Index?

I'm carrying out nearest neighbor analysis on a set of geological features in QGIS, trying to find out whether they're clustered or not. I've calculated the nearest neighbor distances using the ...
2
votes
2answers
56 views

Finding patterns using ArcMap?

I'm new using ArcMap and I have a GDB of schools (and its enrollment data) at block level. What I need to do is to find the places with the most concentration of enrollment in a radius of 5km. Since ...
1
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0answers
38 views

How to perform statistical test for two sets of points?

(I have asked this question originally on Cross Validated; however, no good answer and someone suggested me to ask the question here). We know that we can perform statistical test (e.g., t-test) for ...
4
votes
1answer
77 views

Looking for similarity analysis tool between raster and vector layers in QGIS?

I'm aiming to do a similarity analysis between a raster layer and a vector layer. The raster layer is a 5-class ice map and the vector layer (points) contains ice jam events data. The goal here is to ...
0
votes
0answers
14 views

Aggregating Individual District Assignments to Census Block

Working on a solution that may work but figured I'd ask the community to see if there's a smarter way to get this task done. I have a voter registration file with district assignments for each voter. ...
3
votes
1answer
98 views

Error while comparing two raster layer in R

I have got a geographic point distribution with N prehistoric settlements with a size of x and want to compare the distribution with an economic simulation, which produces M settlements (Usally N > ...
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0answers
34 views

How to 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 ...
1
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0answers
21 views

Why are spatial lagged exogeneous variables rarely used?

In the publication "Regional Productivity and Income Convergence in the Unified Germany 1992-2000" (link) it is claimed without detailed explanation: "Usually, in spatial econometric models only ...
0
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0answers
20 views

What are the practical differences between Moran's I and Geary's C

What are the practical differences between Moran's I and Geary's C for gridded datasets (e.g. temperature) on a continental scale such as USA? Which is more applicable?
4
votes
1answer
94 views

Finding Median, Max and Min values from Raster Layers in QGIS

I currently have 10 years worth of January raster datasets (working on just one month at the moment) of cloud fraction cover from MODIS, and am trying to create new 3 separate rasters which will give ...
0
votes
0answers
16 views

arcgis extensions for GWPCA [duplicate]

Dose anyone knows if there is any toolbox or extension for calculate GWPCA (geographic weighted principal component analysis) in arcgis ? I know there is package for that in R but i dont know anything ...
1
vote
1answer
24 views

Number of events within each elevation class

I'm trying to model how elevation affects fire events for an AOI, I have run my cluster analysis for the fire events and right now I'm trying to calculate how many fire events fall within each ...
1
vote
1answer
26 views

Calculating Categorical Raster Areas per Polygon

I've got forest fragmentation data from which I've extracted pixels that correspond to forest edges and patches. I've also got a shapefile of counties in a US state. I'm trying to get the area of ...
3
votes
0answers
151 views

Queen vs Rook neighborhood

Queen and rook neighborhoods are two common ways to calculate statistics for a focal cell. They are also known an Moore and (von) Neumann neighborhoods. I think a "bishop version", i.e. from lower ...
1
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0answers
9 views

How to choose the correct range for Moran's I correlogram with irregularly shaped areas? [duplicate]

This question was first ask on Cross Validated, but I think it might be better suited to Geographic Information Systems. First question here, so I apologize if it doesn't fit! I am doing correlograms ...
9
votes
1answer
292 views

Calculating spatial correlation between features from two separate layers in QGIS

I am trying to determine whether the presence of large numbers of active duty military troops in an area is spatially correlated with higher/lower levels of violent crime. That is, are the areas ...
2
votes
0answers
39 views

Spatial heterogeneity: What does spatially varying mean of a process exactly mean?

Imagine the following data set (from http://www.novaims.unl.pt/labnt/geosom/georepository/) which consists of three different regions: Obviously, blue points are more like to be located close to ...
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0answers
25 views

Extremely high z-values for Moran's I

I made the following in advance: I aggregated population data to 100*100m Grids. Afterwards I wanted to find out, weather there is autocorrelation in the data or not. For this I applied the Moran's I ...