WMO BUFR standard in ISO terms - Open Geospatial Consortium
WMO BUFR standard in ISO terms - Open Geospatial Consortium
WMO BUFR standard in ISO terms - Open Geospatial Consortium
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© Crown copyright Met Office<br />
<strong>BUFR</strong> Modifiers<br />
• <strong>BUFR</strong> Modifiers<br />
• Change the descriptors or simple features<br />
• They change the simple features WITHIN an <strong>in</strong>stance (a <strong>BUFR</strong><br />
Bullet<strong>in</strong>)<br />
• Rather like a DTD<br />
• They group simple features <strong>in</strong>to a collection<br />
• They create feature attributes<br />
• identity, location (parametric x,y, and z), time, location and time<br />
ranges, <strong>in</strong>strumentation, roles, quality <strong>in</strong>fo<br />
• They create Discrim<strong>in</strong>atedFeatures (<strong>ISO</strong>19126)<br />
• E.g. discrim<strong>in</strong>ate a temperature feature to be a different<br />
temperature type, e.g. period extreme, sea surface, ground<br />
temperature<br />
• They create Discrim<strong>in</strong>atedFeatures and def<strong>in</strong>e another<br />
dependent coord<strong>in</strong>ate<br />
• E.g. discrim<strong>in</strong>ate temperature feature to become an upper-air<br />
temperature measured at a (set of) pressure, geopotential or height
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