precisioncheck: Check the precision of the coordinates

In biogeo: Point Data Quality Assessment and Coordinate Conversion

Description

Checks the precision of the coordinates to determine whether the coordinate fall exactly at the centre or exactly on top left corner of a grid cell of a particular spatial resolution e.g. 30 minute.

Usage

precisioncheck(dat, x = "x", y = "y", s, e)

Arguments

dat	a dataframe containing fields with the following names: ID, x, y, Species, x_original, y_original, Correction, Modified, Exclude
x	name of the x-coordinate in decimal degrees
y	name of the y-coordinate in decimal degrees
s	start spatial resolution in minutes e.g. 10 min
e	end spatial resolution in minutes e.g. 30 min

Details

Grid cells of sizes corresponding to the start spatial resolution an increasing by 5 minutes up to the end spatial resolution will be considered.

Value

returns the contents of dat and includes columns for each spatial resolution e.g. p10m for 10 minute spatial resolution. These columns contain values of 1 if the record is considered to have a low precision and zero otherwise. A column called preci contains values of 1 if any of the other columns tested have a value of one.

Note

In most cases the values should be set as s=10 and e=30

Author(s)

Mark Robertson

See Also

errorcheck

Examples

precisioncheck(dat, x = "x", y = "y", s=10, e=30)

biogeo documentation built on May 1, 2019, 8:05 p.m.