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SDraw (version 2.1.8)

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

24

Version

2.1.8

License

GNU General Public License

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Repository

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

Maintainer

Trent McDonald

Last Published

March 7th, 2019

Functions in SDraw (2.1.8)

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

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

halton.indices.CRT

Halton indices by the Chinese Remainder Theorem (CRT)

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

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

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

Maximum integer used in the BAS routines

sdraw.SpatialLines

Sample draws from spatial objects.

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

SpatialLinesDataFrame of the coastline of Hawaii, USA

Selection of spatially balanced samples.

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

Compute points in the Halton sequence.

hip.plot.lattice

Plot a Halton Lattice over a polygon resource

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

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

voronoi.polygons

Calculate Voronoi polygons for a set of points

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

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

halton.indices.vector

Halton indices for an entire vector of coordinates

Halton lattice inside a rectangle

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

SpatialPolygonsDataFrame for the state of Washington, USA

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

SpatialPointsDataFrame of cities in Washington state, USA

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

halton.coefficients

halton.coefficients

Construct a Halton sampling frame.

Plot sample and frame

SpatialPolygonsDataFrame of counties in the state of Wyoming, USA

Extended Greatest Common Denominator (GCD) algorithm.

halton.lattice.polygon

Halton lattice inside a SpatialPolygon* object.

hip.lattice.polygon

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