# Bathymetry Terrain Elevation (land/ocean) (`Bathymetry_2024_1km`) — EDIS AI Agent Dataset View

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## 1. Dataset Metadata
- **Raster Name**: Bathymetry Terrain Elevation (land/ocean)
- **Slug**: `Bathymetry_2024_1km`
- **Units**: `Elevation (m)`
- **Spatial Extent**: UL(90.0026808, -179.9963784) to LR(-90.0026808, 180.0053616)
- **Summary**: This dataset represents a continuous global terrain surface combining both land elevation and ocean bathymetry derived from the GEBCO_2024 Grid.
- **Included in Flagship Map Package**: `Global_ISO9223_2020_2024_LE_V4` (`GET https://secure.engineeringdirector.com/api/bundles/Global_ISO9223_2020_2024_LE_V4/point_query`)

### Color Table & Value Breaks
- `(-10917.0, (15.0, 25.0, 70.0))`
- `(-10825.3, (16.0, 27.0, 74.0))`
- `(-10733.6, (17.0, 29.0, 78.0))`
- `(-10641.9, (18.0, 31.0, 82.0))`
- `(-10550.2, (19.0, 33.0, 86.0))`
- `(-10458.5, (20.0, 35.0, 90.0))`
- `(-10366.8, (21.0, 37.0, 94.0))`
- `(-10275.1, (22.0, 39.0, 98.0))`
- `(-10183.4, (23.0, 41.0, 102.0))`
- `(-10091.7, (24.0, 43.0, 106.0))`
- `(-10000.0, (25.0, 45.0, 110.0))`
- `(-10000.0, (25.0, 45.0, 110.0))`

# Bathymetry 2024 – Terrain Elevation (1 km)

## Overview

This dataset represents a continuous global terrain surface combining both land elevation and ocean bathymetry derived from the **GEBCO_2024 Grid**.

The raster provides a globally consistent representation of:

- Land topography
- Coastal terrain
- Continental shelves
- Ocean bathymetry
- Offshore source regions
- Coastal transition zones

The dataset is used within ISO 9223 atmospheric corrosion workflows to support chloride deposition estimation, coastal exposure analysis, marine aerosol transport modeling, and environmental exposure assessment.

**Units:**

- Meters (m)
  - Positive values represent elevation above mean sea level
  - Negative values represent bathymetric depth below mean sea level

---

## Background

Terrain elevation and bathymetry play an important role in atmospheric corrosion modeling by influencing coastal exposure, marine aerosol transport, and inland chloride deposition behavior.

This dataset provides a continuous land–ocean terrain framework suitable for:

- Chloride deposition modeling
- Coastal exposure assessment
- Marine aerosol transport analysis
- Distance-to-coast refinement
- Offshore-to-onshore transition modeling
- Environmental exposure assessment

The raster was developed from the GEBCO_2024 global terrain model and harmonized to a 1 km analysis grid for integration with AtmosphericIQ and Engineering Director environmental datasets.

---

## Modeling Methodology

The terrain framework is based on the GEBCO_2024 global land and ocean terrain model.

Primary source data include:

- Global land topography
- Ocean bathymetry
- Continental shelf geometry
- Coastal terrain features

The modeling framework incorporates:

### Terrain Processing

- Global terrain acquisition
- Elevation harmonization
- Land/ocean continuity preservation
- Coastal transition conditioning

### Spatial Integration

- WGS 84 reprojection
- 1 km spatial resampling
- Environmental raster alignment
- Global coverage standardization

### Coastal Exposure Support

- Offshore source region identification
- Coastal geometry interpretation
- Peninsula and island characterization
- Marine aerosol transport pathways

### Environmental Modeling Integration

- Chloride deposition modeling
- Distance-to-coast analytics
- Wind exposure interpretation
- Atmospheric exposure workflows

The resulting framework provides a globally consistent terrain surface suitable for environmental and atmospheric corrosion applications.

---

## Interpretation Guidelines

| Elevation / Depth (m) | Interpretation |
|---|---|
| < -4000 | Deep Ocean Basin |
| -4000 to -1000 | Ocean Basin / Continental Slope |
| -1000 to -200 | Continental Slope / Shelf Transition |
| -200 to 0 | Continental Shelf / Nearshore Marine Zone |
| 0 to 100 | Low-Elevation Coastal Terrain |
| 100 to 1000 | Upland Terrain |
| >1000 | Mountainous / High-Elevation Terrain |

Terrain and bathymetry influence atmospheric exposure by affecting marine aerosol transport, coastal exposure gradients, and inland chloride deposition behavior.

---

## Spatial Resolution

| Property | Value |
|---|---|
| Coverage | Global |
| Published Resolution | ~1 km |
| Native Resolution | 15 Arc Seconds |
| Coordinate System | WGS 84 |
| EPSG Code | 4326 |
| Source Dataset | GEBCO_2024 Grid |

---

## Data Sources

Primary environmental inputs include:

- [GEBCO 2024 Grid](https://www.gebco.net/data-products-gridded-bathymetry-data/gebco2024-grid)
- Global land elevation datasets
- Global bathymetric datasets
- Coastal terrain products

Derived environmental layers supported by this dataset include:

- Chloride Deposition
- Distance to Coast
- WindRIX Terrain–Wind Exposure Index
- Wind Exposure Modeling
- Atmospheric Corrosion Layers

---

## Intended Applications

This dataset may be used for:

- Atmospheric corrosion assessment
- Chloride deposition modeling
- Coastal exposure analysis
- Marine aerosol transport studies
- Environmental exposure assessment
- GIS visualization
- Terrain analysis
- Environmental modeling
- Enterprise API workflows

---

## Related Datasets

### Corrosion Layers

- [ISO 9223 Steel Corrosion Rate](https://secure.engineeringdirector.com/public/map/ISO9223_Steel_2020_2024_1km)
- [ISO 9223 Zinc Corrosion Rate](https://secure.engineeringdirector.com/public/map/ISO9223_zinc_2020_2024_1km)
- [ISO 9223 Aluminum Corrosion Rate](https://secure.engineeringdirector.com/public/map/ISO9223_Aluminum_2020_2024_1km)
- [ISO 9223 Copper Corrosion Rate](https://secure.engineeringdirector.com/public/map/ISO9223_Copper_2020_2024_1km)

### Supporting Atmospheric Layers

- [Mean Chloride Deposition](https://secure.engineeringdirector.com/public/map/ISO9223_Chlorides_2020_2024_1km)
- [Mean Sulfate Deposition](https://secure.engineeringdirector.com/public/map/ISO9223_Sulfates_2020_2024_1km)
- [Mean Annual Temperature](https://secure.engineeringdirector.com/public/map/ISO9223_Temp_2020_2024_1km)
- [Mean Relative Humidity](https://secure.engineeringdirector.com/public/map/ISO9223_Humidity_2020_2024_1km)
- [Time of Wetness (TOW)](https://secure.engineeringdirector.com/public/map/tow_global_2020_2024_ERA5)

### Supporting Coastal & Terrain Layers

- [Distance to Coast](https://secure.engineeringdirector.com/public/map/Distance_to_Coast_2013_1km)
- [Bathymetry 2024 – Terrain Elevation](https://secure.engineeringdirector.com/public/map/Bathymetry_2024_1km)
- [WindRIX Terrain–Wind Exposure Index](https://secure.engineeringdirector.com/public/map/windrix_style_2020_2024_ERA5)
- [Wind Resultant Direction (0–360°)](https://secure.engineeringdirector.com/public/map/Wind_Degree_Direction_2020_2024_ERA5)
- [Wind Speed](https://secure.engineeringdirector.com/public/map/wind_speed_2020_2024_ERA5)

---

## Attribution

**Joseph Mazzella**  
AtmosphericIQ LLC  
Engineering Director, Inc.

---

## Dataset Citation

> Mazzella, J. (2026). *Bathymetry 2024 – Terrain Elevation Raster (1 km).* AtmosphericIQ LLC / Engineering Director, Inc.

---

## Supporting Dataset Citations

### GEBCO 2024 Grid

> GEBCO Compilation Group. (2024). *The GEBCO_2024 Grid — A Continuous Terrain Model of the Global Oceans and Land.*  
> British Oceanographic Data Centre, National Oceanography Centre, NERC, United Kingdom.  
> https://doi.org/10.5285/1c44ce99-0a0d-5f4f-e063-7086abc0ea0f

### GEBCO Technical Documentation

> GEBCO. (2024). *The GEBCO_2024 Grid.*  
> https://www.gebco.net/data-products-gridded-bathymetry-data/gebco2024-grid

### ISO 9223 Standard

> ISO 9223:2012. *Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination and estimation.*  
> https://www.iso.org/standard/53499.html

---

## Version Information

| Property | Value |
|---|---|
| Dataset Name | Bathymetry 2024 – Terrain Elevation |
| Dataset Version | 1.0 |
| Publication Year | 2026 |
| Author | Joseph Mazzella |
| Organization | AtmosphericIQ LLC / Engineering Director, Inc. |
| Coverage | Global |
| Published Resolution | ~1 km |
| Native Resolution | 15 Arc Seconds |
| Units | Meters (m) |
| Coordinate System | WGS 84 (EPSG:4326) |
| Source Dataset | GEBCO_2024 Grid |
| Data Type | Continuous Raster |
| Content | Land Elevation and Ocean Bathymetry |

---

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