pressurepaths.csv

A GeoPressureR pressurepath constains the ERA5 variables along the trajectory of the bird on an hourly interval and using the exact location of the bird (accounting of flight). Read more about pressurepath on the GeoPressureManual

Similarly to path, there are 4 types of pressurepath : tag, most_likely, simulation and geopressureviz. See pressurepaths.type for more details.

pressurepath should be used in combinaison with staps and paths which can be JOIN by tag_id and stap_id.

The definition below does not list the ERA5 variables which can (and should!) be added to the table as additional columns (e.g. 'altitude' or 'surface_pressure'). Read more about these variable in the documentation of pressurepath_create()

Pressurepaths

Source: pressurepaths-table-schema.json

Name	Definition	Type
`tag_id`*	Unique identifier of the tag. Foreign key to `tags.tag_id`. Constraints required: `true` Example: `18LX`	string
`datetime`*	Date and time of the pressure measurement. Formatted as an ISO 8601 string with timezone designator `YYYY-MM-DDThh:mm:ssZ`. Constraints required: `true` Example: `2020-04-01T22:00:00Z` Close to http://vocab.nerc.ac.uk/collection/MVB/current/MVB000200	datetime
`stap_id`*	Identifier of the stationary period. Foreign key to `staps.stap_id`. A main different with `pressurepath` is that `stap_id` can have decimal value indicating a pressure measurement taken while in migration between two ‘integer’ stationary periods. Constraints required: `true` Example: `3`	number
`type`*	One of: `tag`: Create with `tag2path()` from a likelihood map. `most_likely`: Created with `graph_most_likely()` `simulation`: created by `graph_simulation()`: `geopressureviz`: created by `geopressureviz()`. Constraints required: `true` enum: `tag, most_likely, simulation, geopressureviz` Example: `3`	string
`lat`*	Latitude of the stationay period. Constraints required: `true` minimum: `-90` maximum: `90` Example: `52.70442` Same as http://rs.tdwg.org/dwc/terms/decimalLatitude	number
`lon`*	Longitude of the stationay period. Constraints required: `true` minimum: `-180` maximum: `180` Example: `23.84995` Same as http://rs.tdwg.org/dwc/terms/decimalLongitude	number
`ind`	Indices of the 2D coordinate of the spatial map defined in `GeoPressureR::tag_set_map()` (see also `GeoPressureR::map_expand()`. Useful to retrieve information on the graph (e.g. `GeoPressureR::path2edge()`. This value is the main way to create a path in GeoPressureR through `GeoPressureR::ind2path()`. Constraints required: `false` minimum: `1` Example: `23343`	integer
`j`	Only useful for `paths.type='simulation'`. Unique identifier for each trajectory, integer from `1` to `nj` as defined in `GeoPressureR::graph_simulation()``. Constraints required: `false` minimum: `1` Example: `1`	integer