Intern:Topologic type

Data sets stored in the relational model of pangaea are technically consistent but can have different spatial and temporal coverage and different configurations. If importing or editing the meta-description of a data set in 4th Dimension, the Topologic type should be set on the Details card to define its type.

Topologic Type 2 POINT
Event label (station/sample/measurement point) defined by one lat/long pair of coordinates with related data sets having 1 to n parameters measured.
 * Example : ; dimension: 0; type: point

Topologic Type 3 VERTICAL PROFILE
Event label defined by one lat/long pair of coordinates and having a third spatial dimension (depth, elevation, height). 1 to n data sets with 1 to n parameters. (This is the most common data set type).
 * Example:,  ; dimension: 1; type: vertical profile

Topologic Type 8 TIME SERIES
Event label defined by one lat/long pair of coordinates and having a third temporal dimension (date/time or age). 1 to n data sets with 1 to n parameters can be related.
 * Example:  dimension: 0; type: time series

Topologic Type 4 HORIZONTAL PROFILE
Event label defined by two lat/long pairs of coordinates defining begin and end of a horizontal profile. The related data set(s) are fully georeferenced which means, that data sets include lat and long for each line. A third spatial dimension (depth) can be added. Mostly the temporal geocode date/time is added, sorting the data in time along the vector line. The spatial coverage is calculated by the system during the import; it is given by the coordinates of the upper left and the lower right corner of a rectangle around the vector.
 * Example:  dimension: 2; type: horizontal profile/vector

Topologic Type 6 IRREGULAR SURFACE
Randomly distributed points on an area where the data points are related to event labels or just have a georeference in the data set. A third spatial and or temporal dimension (depth/age) might be added to define the vertical position of the area, but must always contain the same value. As in (4) the spatial coverage is calculated by the system during the import; it is given by the coordinates of the upper left and the lower right corner of a rectangle around all data points.
 * Example:  dimension: 2; type: area/2D/surface

Randomly distributed points on an area where the points are event labels or are georeferenced in the data set. A third spatial dimension (depth/distance/elevation) is added to define the vertical position of each value.
 * no example yet; dimension: 3; type: area/3D

Topologic Type 9 TIME SLICE
To a three dimensional data set as defined in 6 IRREGULAR SURFACE also the time might be added, forming a four dimensional data set.
 * no example yet; dimension: 4; type: area/4D

Topologic Type 1 NOT SPECIFIED
set by default

Topologic Type 11 UNCODED TABLE
Tables having data without a georeference will only be listed in PangaVista. Data might be results of experiments with a time coding only or just ‚tables‘. (They may have an ordinal number as a sorting criteria included). Those data sets can be related to the event label ‚not_given‘ which has -999.999 used for lat/long and which will not appear in the metaheader.
 * Example: no dimension; type: uncoded table

If for any reason, a data set can not be imported to the relational system, it can be stored as a flat file on the Pangaea web server. In this case a data description is defined without a relation to an event. The link to the file (or directory containing the files) must be typed in on the ‚Web‘ card in the URL field and the box ‚static‘ must be checked. No export filename should be given.
 * Example: no dimension; type: link to flat file

This topologic type can also be used for datasets to avoid tracklines in the google maps. Normally tracklines were generated when a dataset has one (or more) events with geocodes latitude, longitude and date/time. If a dataset does not need this trackline, because each position is a point measurement, set topologic type 11 UNCODED TABLE
 * Example:

See also an ESRI article about the marine data model and topology of data sets at: http://www.pangaea.de/curator/files/esri_marine_data_model.pdf