library(here)
library(tidyverse)Explore DwCA v2
Questions
How can I explore the tables for DwCA v2 from this mapping exercise?
You can load the tables from the RDA files like below and play around with the tables as demonstrated in this page. Any pull request is also welcomed.
Does DwCA v2 solve community measurements issue?
Yes! Example: Total count of electrona antarctica is recorded in SurveyTargetAbundance table, only a subset was preserved and recorded in this dataset. The preserved fish is recorded in the Material table.
How is relationship between Materials expressed in DwCA v2?
Very often, we received dataset with measurements performed on a specific body part of an organism. Example: https://www.gbif.org/occurrence/3344249657
DwCA
Currently, I modeled it using eMoF pointing to the Occurrence with body part in measurementRemarks. Specifying the body part can be done through NERC vocabulary. However, it is a hassle to mint NERC for every body part and body part is specific to a taxon.
Occurrence table
| occurrenceID | scientificName |
|---|---|
| SO_Isotope_1985_2017_1013 | Glabraster antarctica (E.A.Smith, 1876) |
eMoF table
| occurrenceID | measurementType | measurementValue | measurementUnit | measurementRemarks |
|---|---|---|---|---|
| SO_Isotope_1985_2017_1013 | The carbon elemental content measured in the tegument of the considered sea star specimen, expressed in relative percentage of dry mass | 12.28 | relative percentage of dry mass | tegument |
DwCA v2
Yes! Relationship between Materials can be specified through the Material table. Example of a krill eaten by a fish can be modeled within a single Material table
#material %>% filter(str_starts(materialEntityID, "AAV3FF_00025"))