Data Specification List (Advanced Topic)

This is the only way (at present) to specify different combinations of sources, series, locations, and offsets. Primarily meant for retrieving NCEP model data (we import) from NWS CCWFO. The position-based list looks like this:

The named argument list looks like:

• srcid is the source id (e.g., 250, 254).
• location is a specific location w/in the source (e.g., GalvestonBay, BobHallPier). Valid Locations
• series is the data series.
• offset is either the explicit offset (e.g., 6, 9) or a maximum offset--preceeded by a less-than (<) sign (e.g., <6, <9).

Example

To retrieve predicted air temperature forecasts from BirdIsland, your DSpec might look like this:

If you want predicted air temperature forecasts that are at most 9 hours old, you add an offset value:

If you only want 12 hour forecasts for predicted air temperature, use this:

For past performance comparisons where you want forecasts that are at least a certain age (say, at least 6 hours "old"), specify a minimum offset like so: