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giswr
> events
> 1st nhda symposium
> tuesday >
rad
The Reach Address Database
(RAD)
An Application-Ready NHD Implementation
The U.S. Environmental Protection Agency (EPA) has constructed
the Reach Address Database (RAD); a national seamless NHD
database using ESRI SDE in an Oracle database. The RAD is
designed to support multiple applications as well as allow
for direct access by EPA users. We'll discuss the issues
involved in putting the NHD "cans" together, loading the
NHD into SDE, one design for an SDE implementation of the
NHD (and why), and some common user needs for NHD data and
how they influence the RAD's design. Included in this discussion
will be event rendering using the NHD reaches and web access
to the RAD.
Outline:
- Putting the NHD together (Append.AML issues, etc.)
- NHDinSDE (some RDBMS and SDE pointers)
- User Needs (Enviromapper for the EPA Office of Water,
event storage/maintenance/etc., generic NHD/event user)
- Database Design Issues to Support Users (SDE tips, NHD
tips, event tips)
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