NVC_graph: Core NVC data (Unit & UnitDescription) as a graph

In jacob-ogre/USNVC: Package for the United States National Vegetation Classification

Description

The U.S. National Vegetation Classification (NVC) is provided as a series of tables at http://usnvc.org/explore-classification/. The NVC is fundamentally hierarchical; representation of the data as a directed acyclic graph (DAG) is useful because of the tools available for graphs are useful for traversing the hierarchy.

Usage

NVC_graph

Format

An igraph graph with 8193 nodes and 8192 edges, and 46 attributes identical to those of unit_data

ELEMENT_GLOBAL_ID

The unique identifier of the NVC category

PARENT_ID

The identifier of the parent of the NVC category

D_CLASSIFICATION_LEVEL_ID

A factor corresponding to the level of the hierarchy

elementUID

ELEMENT_GLOBAL_ID prefixed with '2.', presumably to identify it as deriving from version 2 of the standard

classificationCode

An alpha-numeric sequence indicating the placement of the category in the NVC hierarchy

databaseCode

An identifier for creating an SQL database

Status

Whether the category has been accepted into the NVC

colloquialName

A 'common' name for the category, if available

scientificName

A name for the category, which may include scientific names of characteristic taxa

formattedScientificName

'scientificName' with HTML formatting

translatedName

'scientificName' with common name substitution

hierarchyLevel

Name of the level of the hierarchy

unitSort

An alpha-numeric code indicating the placement of the category in the NVC; different from 'classificationCode'

USstatus

A code ???

parentKey

The 'databaseCode' of the parent of a category

parentName

Another representation of the parent of a category

typeConceptSentence

A concise sentence describing the category

typeConcept

Text description of the conceptual model of the category

classificationComments

Comments about the classification

similarNVCtypesComments

Comments referencing similar categories

diagnosticCharacteristics

Text description (with HTML tags) of the characteristics that differentiate the category

Rationale

Unknown; all NA

Physiognomy

Text description (with HTML tags) of the physiognomic characteristics (structure) of the category

Floristics

Text description (with HTML tags) of the floral characteristics (species/groups) of the category

Dynamics

Text description (with HTML tags) of the physical/ecological dynamics of the category

Environment

Text description (with HTML tags) of the environmental characteristics (e.g., climate) of the category

Analysis

Unknown; all NA

Range

Text description of the category's geographical spread and/or relationship to other classifications

spatialPattern

Categorical designation of how the NVC category is typically arranged, e.g., large patch vs. linear

Nations

Comma-separated string of two-letter country codes indicating nations where the category is found

Subnations

Comma-separated string of two-letter state and province codes indicating where the category is found

federalLands

Semicolon-separated string of agency and site where the category is found

tncEcoregions

Comma-separated string relating the category to one or more TNC ecoregion

usfsEcoregions

Comma-separated string relating the category to one or more USDA Forest Service ecoregion

omernikEcoregions

Unknown; all NA

classif_confidence_id

A code describing Low:High confidence of the category classification; see d_classif_confidence

confidenceComments

Text describing how/why the confidence level was assigned; mostly empty

Synonymy

Text (with HTML tags) describing synonyms or approx. synonyms of the category to other classifications

primaryConceptSource

Reference of the authority of the concept

descriptionAuthor

The person/entity who authored the 'description' (perhaps the typeConcept?)

Acknowledgements

Text giving acknowledgement

versionDate

Text date stamp, format = mm/dd/yyy

CLASSIFICATION_LEVEL_NAME

Name of the level of the hierarchy; see also hierarchyLevel

DISPLAY_ORDER

Numeric indicator of the category's placement in the hierarchy

parent_level_id

Numeric indicator of the category's parent category

Source

https://www1.usgs.gov/csas/nvcs_data/USNVCFullDownload.zip

jacob-ogre/USNVC documentation built on May 18, 2019, 8 a.m.