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SDraw (version 2.1.13)

Spatially Balanced Samples of Spatial Objects

Description

Routines for drawing samples from spatial objects, focused on spatially balanced algorithms. Draws Halton Iterative Partition (HIP) (Robertson et al., 2018; ), Balanced Acceptance Samples (BAS) (Robertson et al., 2013; ), Generalized Random Tessellation Stratified (GRTS) (Stevens and Olsen, 2004; ), Simple Systematic Samples (SSS) and Simple Random Samples (SRS) from point, line, and polygon resources. Frames are 'SpatialPoints', 'SpatialLines', or 'SpatialPolygons' objects from package 'sp'.

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install.packages('SDraw')

Monthly Downloads

18

Version

2.1.13

License

GNU General Public License

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Repository

https://github.com/tmcd82070/SDraw/wiki/SDraw

Maintainer

Trent McDonald

Last Published

July 3rd, 2020

Functions in SDraw (2.1.13)

Selection of spatially balanced samples.

SpatialLinesDataFrame of the coastline of Hawaii, USA

SpatialPointsDataFrame of cities in Washington state, USA

SpatialPolygonsDataFrame for the state of Washington, USA

SpatialPolygonsDataFrame of counties in the state of Wyoming, USA

Extended Greatest Common Denominator (GCD) algorithm.

Draws a Balanced Acceptance Sample (BAS) from a linear resource (line).

Draws a Balanced Acceptance Sample (BAS) from an area resource (polygons).

Draws a Balanced Acceptance Sample (BAS) from a discrete resource (points).

halton.coefficients

halton.coefficients

Plot sample and frame

halton.indices.CRT

Halton indices by the Chinese Remainder Theorem (CRT)

hip.lattice.polygon

Halton Iterative Partition lattice inside a bbox (bounding box) matrix object.

Halton lattice inside a rectangle

halton.indices.vector

Halton indices for an entire vector of coordinates

halton.lattice.polygon

Halton lattice inside a SpatialPolygon* object.

hip.plot.lattice

Plot a Halton Lattice over a polygon resource

Construct a Halton sampling frame.

hip.point - Halton Iterative Partition (HIP) of point resources.

Draw a equi-probable GRTS sample from an area (polygon) resource.

Compute points in the Halton sequence.

voronoi.polygons

Calculate Voronoi polygons for a set of points

Draw a equi-probable GRTS sample from a linear (line) resource.

Draws a Simple Systematic Sample (SSS) from an area resource (polygons).

Maximum integer used in the BAS routines

Draw a Simple Systematic Sample (SSS) from a point resource or finite population frame.

sdraw.SpatialLines

Sample draws from spatial objects.

Draw a Simple Random Sample (SRS) from a linear resource.

Draw a Simple Random Sample (SRS) from a point resource or finite population frame.

Draws a Halton Iterative Partition (HIP) sample from a continuous 2-dimensional (polygon) resource.

Draw a equi-probable GRTS sample from a discrete (point) resource.

Draws a Simple Random Sample (SRS) from an area resource (polygons).

Draw a Simple Systematic Sample (SSS) from a linear resource.