# Round coordinates to generalize camera trap locations

Source:`R/round_coordinates.R`

`round_coordinates.Rd`

Rounds deployment coordinates to a certain number of digits to fuzzy/generalize camera trap locations. This function can be used before publishing data in order to protect sensitive species and/or prevent theft of active cameras.

## Arguments

- package
A Camtrap DP, as read by

`read_camtrap_dp()`

.- digits
Number of decimal places to round coordinates to (

`1`

,`2`

or`3`

).

## Value

`package`

with rounded coordinates as well as updated
`coordinateUncertainty`

.(in deployments) and `coordinatePrecision`

(in
metadata).

## Details

Rounding coordinates is a recommended method to generalize sensitive biodiversity information (see Section 4.2 in Chapman 2020). Choose a number of digits that aligns with the sensitivity of the data and notice the effect on precision and uncertainty. Publish the coordinates as is (i.e. do not use this function) if the data are not sensitive.

sensitivity | digits | coordinatePrecision | coordinateUncertainty |

high | 1 | 0.1 | original uncertainty + 15691 m |

medium | 2 | 0.01 | original uncertainty + 1570 m |

low | 3 | 0.001 | original uncertainty + 157 m |

For records with `coordinateUncertainty = NA`

the function will assume the
coordinates were obtained by GPS and use `30 m`

as original uncertainty,
before adding uncertainty caused by rounding.
The added uncertainty is the largest possible value caused by rounding (see
Table 3 in
Chapman & Wieczorek 2020).

## Examples

```
# Round coordinates of example package to 3 digits
mica <- round_coordinates(mica, 3)
# coordinatePrecision is set in metadata
mica$coordinatePrecision
#> [1] 0.001
# coordinateUncertainty is set in data: original uncertainty (or 30) + 157 m
mica$data$deployments$coordinateUncertainty
#> [1] 187 187 187 187
```