Using GFE as a DHM Grid Editor

ABRFC testing

• Prototype procedure developed for “GFE at the RFCs” OSIP project.

• Uses ABRFC-developed tools to read / write XMRG-formatted data into / from GFE.

• Uses existing GFE smart tools to modify the imported data

Details…• Proof-of-concept only. Procedure tested on

precipitation data but can work for any XMRG-formatted data (e.g. soil moisture). Needs modifications for more general use.

• NWSRFS-like “mods” are performed on the data with mathematical GFE smart tools.

• Examples:– Use the “Adjust” tool for “RRIMULT.”– Use “Assign Value” tool for “RRICHNG.”

Details…

• Testing with default GFE projection showed unacceptable data distortions were introduced when translating from / to HRAP while reading / writing XMRGs.

• ABRFC now runs GFE server on HRAP projection – suitable for current operational use.

1-hour rainfall from XMRG with edit area highlighted

Calling up the “Adjust” tool…

Doubling the rainfall…

Rainfall doubled in selected area.

Calling up the “WriteXMRG” tool…

Saving the modified data…

Original data as viewed in XNAV.

Modified data as viewed in XNAV.

Questions ?

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Demonstration ?