# COORDINATE_PRECISION_UNCERTAINTY_MISMATCH - AtlasOfLivingAustralia/ala-dataquality Wiki

# Description

The coordinate uncertainty in metres does not match the number of decimal places given for coordinate precision. Related fields

- dwc:coordinatePrecision
- dwc:decimalLatitude
- dwc:decimalLongitude
- dwc:verbatimCoordinates
- dwc:verbatimLatitude
- dwc:verbatimLongitude

# Implications and caveats

**Severity: Warning**

- Coordinate uncertainty provides an evaluation of how close the actual occurrence was to the supplied coordinates. It is provided in metres and gives the radius from the coordinates given within which an actual occurrence happened. There may be uncertainty around the actual coordinates due to: locations originally provided by text description rather than coordinates; coordinates determined from map readings; coordinates provided from early geo-positioning systems.
- This issue flags occurrences where the radius in metres for uncertainty doesn’t match the area associated with the supplied coordinate precision. This article helps to explain the areas given for different levels of coordinate precision.
- This issue could indicate incorrect precision, or truncation or rounding of the coordinate data (most likely with trailing zeros)

# Data custodian recommendations

Review the coordinate precision supplied and the coordinate uncertainty in metres.

# Code reference

OccurrenceIssue.COORDINATE_PRECISION_UNCERTAINTY_MISMATCH