This document describes HydrOffice QC Tools 4.9.9.

2.3.1. Overview

The Hydrographic Data Review tab will:

• Receive bathymetric grids and feature file inputs for analysis (see Survey Inputs).

• Scan grids for anomalous grid data “fliers” (see Flier Finder).

• Scan grids for empty grid nodes that meet 2024 version of the NOAA NOS Hydrographic Survey Specifications and Deliverables (HSSD) definitions of “holidays” (see Holiday Finder).

• Compute basic grid statistics to ensure compliance to uncertainty and density requirements prescribed in the 2026 NOAA HSSD (see Grid Stats).

• Scan features to ensure proper attribution (see Feature Scan).

• Ensure surveyed features are properly accounted for in the gridded bathymetry (see VALSOU checks).