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Background

Grid+

Next-generation curvilinear grid building, built for EFDC+

Grid+ Overview

What is Grid+?

Grid+ is a next-generation grid building tool and the successor to CVLGrid. Redesigned from the ground up, it makes the grid-building process faster, more intuitive, and robust enough to handle even the most challenging waterbodies. Fully integrated into EEMS, users can move seamlessly between grid building and model execution within a single environment.

Build Complex Grids Quickly

Grid+ is built for scale and complexity. Whether you’re modeling the Amazon River, the San Joaquin–Sacramento River Delta, or any other demanding waterbody, Grid+ delivers — supporting highly complex configurations and grids exceeding half a million cells.

Grid+ in Action

Screenshot of the legacy CVLGrid interface, the predecessor that Grid+ replaces.

The legacy CVLGrid interface — Grid+ is its modern successor.

Screenshot of the legacy CVLGrid interface, the predecessor that Grid+ replaces. Grid mesh for the Kodiak Airport Expansion tide calibration model, overlaid on the surrounding topography.

Kodiak Airport Expansion — tide calibration grid built with Grid+.

Grid mesh for the Kodiak Airport Expansion tide calibration model, overlaid on the surrounding topography.

Optimized for EE & EFDC+

Purpose-built for EE and EFDC+, Grid+ can be launched directly from the EE GUI and supports the creation of model input files without leaving the interface. Compared to CVLGrid, it introduces online background maps, improved orthogonalization routines, and direct download of online bathymetry data.

EE GUI Integration

Grid+ can be launched directly from within the EE GUI and generates model input files without ever leaving the interface.

Online Background Maps

A significant modern enhancement over CVLGrid — Grid+ includes online background maps, designed to reduce setup time and improve grid quality.

Bathymetry & Orthogonalization

Improved orthogonalization routines and direct access to online bathymetry data — all designed to reduce setup time and improve grid quality.

Support for Other Popular Hydrodynamic Models

Grid+ is also available as a standalone tool, supporting grid generation for other widely used hydrodynamic models including ECOM, CH3D, and DELFT3D — all of which require 2D curvilinear orthogonal or Cartesian grids.

Dam with mountains