Mapping Application for Penguin Populations and Projected Dynamics

MAPPPD Metadata


Field Definition
Site name Full site name as per the Antarctic Site compendium
Site id Four letter site code
CCAMLR region CCAMLR sub-region as per the CCAMLR homepage
Longitude Longitude (decimal degrees) in WSG 1984 / EPSG 4326
Latitude Latitude (decimal degrees) in WSG 1984 / EPSG 4326
Common name Common name of species
Day Day of count
Month Month of count
Year Year of count
Season starting Season of count. For example, a count made in January 2014 would have season = 2013. A count made in November 2013 would have season = 2013
Count Number counted or estimated based on vantage. Count type field indicates what was counted
Accuracy Accuracy of count.
Count type The life phase of individuals counted (nests, chicks, adults)
Vantage The type of platform used to make the count
Reference Citation for the count wrapped with HTML code for formatting
Notes Important notes for the count
Mean Mean value of counts from Bayesian posteriors
Lower CI Lower bound of the 90th percentile Bayesian credible interval from the posterior distribution of the model
Upper CI Upper bound of the 90th percentile Bayesian credible interval from the posterior distribution of the model

Hover over table rows for more information


This field represents the full site name as represented in the Antarctic Site compendium

Four letter site codes defined by Lynch for identification purposes across the database. This is the primary key across the tables

E.G. Acuna Island = ACUN

This is the numeric value for the CCAMLR sub-region that the site falls within. For a map of the regions go to the CCAMLR website

The longitude of the centroid of the site in WGS 1984 (EPSG 4326) as calculated by way of a site polygon manually assigned by Lynch et al.

The latitude of the centroid of the site in WGS 1984 (EPSG 4326) as calculated by way of a site polygon manually assigned by Lynch et al.

English common name of the species counted. Either Adelie penguin, Chinstrap penguin, Emperor penguin or Gentoo penguin

Day of the month that the count was performed if known. Some days may not be known due to the information not being avaiable in the publication or report

Month of the year (numeric value: e.g. Jan = 01, Feb = 02) that the count was performed if known. Some months may not be known due to information being unavailable in the report or publication

Gregorian calender year that the count was performed

The season of the count. This does not always correspond to the year. Counts performed between Jan - June of year N are included in season = N - 1 (e.g., February 2010 is Season = 2009)

The actual count either derived or counted for the population. This is a whole number

This is a quality flag that is given to each count in the database. It is scaled from 1 to 5 with 1 being the highest quality and 5 being the lowest. Values of 1 are mostly associated with ground counts while values of 5 are associated with less accurate estimation techniques like satellite / VHR images.

This is the life stage counted and is either:

  • Nests: usually counted early in the season by counting individual adults clearly sitting on a nest
  • Chicks: Counted later in the season after the chicks have hatched and before they have clearly fledged (primarily individuals with downy feathers)
  • Adults: Counted at various times of the year, but could include moulting birds, and non-breeders in a particular colony. May not be reflective of the number breeding

The type of platform used for counting or estimating populations. This can be one of:

  • aerial: Estimates performed from aircraft
  • aerial photo: Counts performed using images taken from an aircraft
  • ground: Counts performed by individuals on the ground within a colony
  • ground photo: These are counts performed using a high resolution photograph. Usually when colonies are too large, or time does not permit for a full count at the moment
  • landsat: estimates from the landsat satellite by estimating guano patch size and extrapolating
  • vhr: estimates made using very high resolution satellite imagery
  • offshore vessel: Counts made by an observer from a stationary vessel platform near a colony. Performed when the colony is not accessible
  • None: These values occur when the information on how an estimate was performed was unavaialble in the report or publication. Efforts are underway to contact authors and individuals to clarify these data

This is the citation for the count wrapped with HTML code for formatting purposes. The formatting can be viewed when you click on "view source" in the count tables tab of your query

These are important notes for the particular count and may include information that will help determine how the accuracy or quality of the count was determined

The posterior samples from the Bayesian population model (n = 4500) are averaged across all sites in your query. E.g. Average(Sample1 Site1,...Sample1 SiteN), Average(Sample2 Site1,...Sample2 SiteN),...Average(Sample4500 Site1,... Sample4500 SiteN). This gives 4500 "possible" values for the total population. We take the mean of those 4500 samples as the estimated population size

This is the lower bound of the 90th percentile of the Bayesian credible interval calculated from the 4500 samples we use to calculate the mean value (see above). This is calculated using the highest posterior density interval (used for Bayesian techniques) as opposed to standard confidence intervals

This is the upper bound of the 90th percentile of the Bayesian credible interval calculated from the 4500 samples we use to calculate the mean value (see above). This is calculated using the highest posterior density interval (used for Bayesian techniques) as opposed to standard confidence intervals