- Search tools in Neotoma Explorer are organized according to the types of queries most commonly requested:
- occurrences of specific taxon/taxa in space and time
- general dataset and/or site characteristics
- data associated with a known person or publication
- These types are represented as tabs in the Search window; criteria are not combined across tabs.
- Taxa/Age searches are applied to individual samples in the Neotoma database and results are aggregated and presented at the dataset level. Consequently, when multiple samples in a dataset meet the search criteria, the AgeOldest and AgeYoungest values reported represent the maximum and minimum age bounds, respectively, of the sample group.
- Many sample ages in the database are reported as ranges rather than discrete values (e.g. 4500-1900 vs. 2200 years before present). Therefore, to be included in search results, a sample age range must be contained completely within the search age range.
- In the Neotoma database, sample ages are measured in several different time scales, and samples associated with more than one chronology have multiple ages. To enable query and comparison across these collective data, we resolve all sample ages to a single calendar-year time-scale. Specifically, we determine the best available default chronology to use and, if necessary, convert sample ages in uncalibrated radiocarbon years to calendar years using a conversion table based on the INTCAL04 calibration curve (Reimer et al. 2004)
Search capabilities will be expanded significantly throughout Summer 2014. Watch for new features!
Created with the Personal Edition of HelpNDoc: Write eBooks for the Kindle
