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Watershed Management
National Hydrography Dataset
What's New
The Florida NHD revision program consists of a project
manager, QA/QC manager and three editors.
Full photo revision yields approximately 150 square miles
per month of updated data per editor.
Maintenance Lite revision focuses primarily on the existing
data where the editors run extensive quality control tests.
Topology (overlap) errors, network continuity, and attribute
validation are a few examples of what the editors are
addressing.
Performing Maintenance Lite can take from a couple days to a
few weeks depending on the severity of the revision needed and
is commonly performed on up to three sub basins at a time per
editor.
The entire state will be reviewed through Maintenance Lite
which means the NHD will be more useable to a greater number of
people in a much shorter amount of time than what it would take
for full photo revision across the entire state.
Full photo revision should proceed much faster once
Maintenance Lite is complete.
Prioritization of editing areas is derived from date of
original USGS 24K DLG quadrangle data, TMDL/WBID requests for
updates, contractual agreements, requests from county/regional
government and requests for miscellaneous revisions.
Revision Statistics to the Florida
24k NHD, August 2011
2012 State of Florida