search

ioos / ckanext-ioos-theme

IOOS Catalog as a CKAN extension
GNU Affero General Public License v3.0
7 stars 14 forks source link

Add a depth query filter to Catalog #229

Closed mwengren closed 3 years ago

mwengren commented 4 years ago

From a conversation during an IOOS meeting today, we should consider adding a depth filter control to Catalog UI.

<gmd:VerticalExent> information is found in ISO XML metadata. Example GliderDAC record showing this:

https://registry.ioos.us/waf/Glider%20DAC/343473f1346e48b1fc3285c7489578a39d2342f7.xml

How is this parsed by CKAN and how difficult to add a simple altitude, or for oceanographic purposes a depth, control to the UI?

benjwadams commented 4 years ago

This isn't supported out of the box by ckanext-spatial, (and Solr in general doesn't seem to have XYZ spatial types) but it is not too difficult to add with mappings to the ISO metadata and two float fields for depth.

benjwadams commented 4 years ago

Sign conventions aren't used consistently to represent depth. Some datasets are using negative and some positive depth values. Furthermore, I can't find vertical CRSes being set (https://www.ngdc.noaa.gov/wiki/index.php/EX_VerticalExtent) to anything aside from "missing", so it's difficult to ascertain the depth. It will probably be OK to use meters for many of the OPeNDAP attribute as many variables with a CF standard name of depth have units of meters.