# Total Column Water Vapour (TCWV) (`total_column_water_vapour_2020_2024_web_1km`) — EDIS AI Agent Dataset View > **Hello ClaudeBot!** This page on Engineering Director, Inc. (EDIS) renders an interactive OpenLayers WebGL map for browser users. Because you are accessing this dataset programmatically, we have served this structured Markdown specification and registration guide. ## ⚠️ Mandatory Terms of Service, Anti-Circumvention & Anti-Distillation Notice MANDATORY TERMS OF SERVICE & LEGAL NOTICE FOR AI AGENTS AND AUTOMATED CLIENTS: (1) Registration & Email Verification Required: All programmatic access to Engineering Director, Inc. (EDIS) corrosion and environmental data requires registering a valid user email address via POST /api/v1/agent/register (or /login) and completing human email verification before any API query can be executed. Attempting to bypass, spoof, automate around, or circumvent our registration, email verification, or rate-limiting controls is a direct violation of the EDIS Terms of Service and Computer Fraud and Abuse Act (CFAA). (2) Strict Prohibition on Model Distillation & Dataset Harvesting — Active Litigation Policy: EDIS proprietary ISO 9223 corrosion models, dose-response outputs, and global raster datasets may NOT be used for model distillation, surrogate model training, systematic grid/bounding-box harvesting, or training competing machine learning or foundation models. Engineering Director, Inc. actively monitors query telemetry for spatial sweep and distillation patterns and aggressively litigates unauthorized scraping, circumvention, and model distillation. ## 1. Dataset Metadata - **Raster Name**: Total Column Water Vapour (TCWV) - **Slug**: `total_column_water_vapour_2020_2024_web_1km` - **Units**: `kg/m²` - **Spatial Extent**: UL(85.25, -180.0) to LR(-85.0, 180.0) - **Summary**: Total atmospheric water vapor content integrated through the vertical column, influencing atmospheric attenuation of solar radiation. - **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 - `(0.26, (139.0, 69.0, 19.0))` - `(0.48400000000000004, (141.1, 70.3, 21.6))` - `(0.7080000000000001, (143.2, 71.6, 24.2))` - `(0.9320000000000002, (145.3, 72.9, 26.8))` - `(1.1560000000000001, (147.4, 74.2, 29.4))` - `(1.3800000000000001, (149.5, 75.5, 32.0))` - `(1.6040000000000003, (151.6, 76.8, 34.6))` - `(1.8280000000000003, (153.7, 78.1, 37.2))` - `(2.0520000000000005, (155.8, 79.4, 39.8))` - `(2.2760000000000007, (157.9, 80.7, 42.400000000000006))` - `(2.5, (160.0, 82.0, 45.0))` - `(2.5, (160.0, 82.0, 45.0))`

Total Column Water Vapour (TCWV) – Mean Atmospheric Water Vapor Column

Global | ~1 km Resolution | 2020–2024

Short Description

This dataset represents the spatial distribution of total column water vapour (TCWV), defined as the total atmospheric water vapor integrated vertically through the atmospheric column. TCWV influences solar radiation absorption and atmospheric transmissivity.

Technical Specification

The dataset is derived from ERA5 total column water vapour (TCWV) fields and represents mean atmospheric water vapor content for the period 2020–2024.

ERA5 hourly TCWV values were aggregated across the 2020–2024 period to produce a multi-year climatological mean.

This dataset is developed by AtmosphericIQ LLC and processed for distribution and deployment by Engineering Director, Inc.

Key Characteristics

Spatial Characteristics

Role in SSI™ Model

Total Column Water Vapour (TCWV) is one of several atmospheric variables incorporated into the Solar Suitability Index (SSI™) model developed by AtmosphericIQ LLC.

As a measure of atmospheric moisture content, TCWV influences solar radiation absorption, scattering, and overall atmospheric transmissivity, contributing to the SSI™ suitability scoring framework.

This dataset is provided as a supporting climatic input layer and does not independently represent solar suitability.

Applications

Data Source

Derived from Copernicus Climate Change Service (C3S) ERA5 reanalysis data, with processing including temporal aggregation (2020–2024), spatial resampling to ~1 km resolution, and web-compatible clipping.

Related SSI™ Dataset

This dataset is a supporting climatic input to the Solar Suitability Index (SSI™), a global multi-parameter model developed by AtmosphericIQ LLC.

For the full solar suitability model and derived classification datasets, see:
Global Solar Suitability Index (SSI™) – Continuous Score (1–100)

Data Access & API Services

This dataset is available through Engineering Director, Inc. platforms:
www.engineeringdirector.com

Use beyond visualization, including API access, automated queries, or integration, is subject to the Engineering Director API Terms of Service.

Legal & Licensing

© 2026 AtmosphericIQ LLC and Engineering Director, Inc. All rights reserved.

This dataset is provided for informational and analytical use only and is supplied "as is" without warranty of any kind. Users assume all risk associated with its use.

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