Questions tagged [distribution]

The frequency or amount at which a thing or things occur within a given area or the set of probabilities that a variable will have a particular value.

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Empirical Bayesian kriging - does data need to be normal?

With empirical Bayesian kriging (ebk), does the data need to be normally distributed? If I apply a normal score transformation, my data is still not normal. Is ebk kriging thus an invalid ...
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60 views

Spatial distribution of vector polygons

I have two vector layers and I am looking for a tool for spatial distribution of the polygons. polygon 1 is the frame, polygon 2 are objects with different size and distribution. I need an index value ...
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Redistribution of polygons: supplementing and filling the specific area with polygons with specific size

I'm studying the impact of green wedges (red outline on the figure) on weather parameters in Copenhagen area. What I want to do is check how spatial redistribution of future afforested areas enacted ...
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76 views

Distribute population to health facilities (GP Practices)

I have been using GIS (ArcGis) for some years but I do not consider myself an expert. I am performing some analysis around GP Practices in London (UK), I would like to be able to estimate the ...
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37 views

How to create point attribute distribution map in QGIS?

I'm working with multiple species distribution data and am looking at creating what amount to density distribution maps of those species. I have a small number of site locations (18) and only 10 ...
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139 views

Underlying distribution of points in an ellipse

I'm attempting to generate both a uniform distribution and a normal distribution of points that fall within an ellipse shape, made from a centre point, semi major and minor and rotation in degrees. I ...
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95 views

Uniformly distribute spatial points over a given extent R

Within a shapefile I am given an integer attribute that indicates the number of points that will need to be evenly (uniformly) distributed over the associated polygons extent. These spatial points ...
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69 views

Compare distributions of point patterns for significant differences in clustering

My problem is I have tens of thousands of points (GPS) representing animal locations over a period of several months. I want to test if a portion of those points (only about a few hundred) which ...
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108 views

Maxent Probabilities Values

I am working on my first experiment with Maxent. I am using two different species. When I receive the output map and look at it in QGIS the values for suitable habitat probability do not sum to 1. ...
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20 views

Generating a distribution map without x and y from given raster-grid into given polygons

I am working on an archaeological map for an excavation. I have given polygons which represent my archaeological layers (SE). Over that I have an grid with 1mx1m from which I have my findings. Each of ...
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42 views

Bay Area Synthetic Network node/line coordinates

I just started working with the Bay Area Synthetic Network and was wondering if this dataset has location (lat/lon) information. I have visualized the files with QGIS, but when it comes to exporting ...
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13 views

Weighted random allocation of points

I'm trying to randomly allocate (a specific number of) points to raster cells which have different weights as value stored. Meaning: A point should be more likely to appear/get allocated to raster ...
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20 views

How to output a raster of special case's distribution with regard to overall distribution?

For example, the crime scenes are unevenly distributed in a city. Each case's scene can be represented as a point. Thus, we can generate a raster map, which shows the crime scenes' density in this ...
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31 views

Electrical Distribution - ArcGIS

I am currently developing a project for which I need to make the preliminary design of the electricity distribution network topology for a population. For this I have the location of the consumers (...
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408 views

Distribution of POI query result

There are a lot of POIS in the database with fileds id name address lon lat. When we tried to query some points for a given bounding box, it is simple to build the accordingly sql and get the results,...