# Mean Sulfate Deposition (`so2_2019_2023`) — EDIS AI Agent Dataset View

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## ⚠️ 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**: Mean Sulfate Deposition
- **Slug**: `so2_2019_2023`
- **Units**: `mg/m²·d`
- **Spatial Extent**: UL(83.8644871, -180.0) to LR(-90.0036558, 179.9982344)
- **Summary**: Used in creation of ISO 9223 raster map
- **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
- `(0.0, (50.0, 150.0, 50.0))`
- `(0.1, (53.0, 153.0, 53.0))`
- `(0.2, (56.0, 156.0, 56.0))`
- `(0.30000000000000004, (59.0, 159.0, 59.0))`
- `(0.4, (62.0, 162.0, 62.0))`
- `(0.5, (65.0, 165.0, 65.0))`
- `(0.6000000000000001, (68.0, 168.0, 68.0))`
- `(0.7000000000000001, (71.0, 171.0, 71.0))`
- `(0.8, (74.0, 174.0, 74.0))`
- `(0.9, (77.0, 177.0, 77.0))`
- `(1.0, (80.0, 180.0, 80.0))`
- `(1.0, (80.0, 180.0, 80.0))`

Total Sulfate Deposition Flux
---
The combined rate at which sulfate compounds are being deposited from the atmosphere to Earth's surface through all removal mechanisms and particle sizes.

**Temporal Coverage:** 2019-01-01 to 2023-12-31 (5-year time-averaged data)

**Spatial Coverage:** Global (180°W to 180°E, 90°S to 90°N)

**Data Source:** MERRA-2 Reanalysis (M2TMNXADG v5.12.4) from NASA GIOVANNI

Constructed from 8 GeoTIFF files contain **sulfate deposition data** divided into two categories and four size bins:

#### **1. Dry Deposition (SUDP)**
- `SUDP001`: Sulfate Dry Deposition Bin 001
- `SUDP002`: Sulfate Dry Deposition Bin 002
- `SUDP003`: Sulfate Dry Deposition Bin 003
- `SUDP004`: Sulfate Dry Deposition Bin 004

#### **2. Wet Deposition (SUWT)**
- `SUWT001`: Sulfate Wet Deposition Bin 001
- `SUWT002`: Sulfate Wet Deposition Bin 002
- `SUWT003`: Sulfate Wet Deposition Bin 003
- `SUWT004`: Sulfate Wet Deposition Bin 004

ISO9223 Sulfate Flux
--------------

ISO9223 describes sulfate flux in this manner

| Category | Description | Deposition Rate (Pₙ) |
|----------|-------------|-----------------------|
| $P_0$       | Rural atmosphere | $P_d$ ≤ 4 mg/(m²·d) |
| $P_1$     | Urban atmosphere | 4 < $P_d$ ≤ 24 mg/(m²·d) |
| $P_2$    | Industrial atmosphere | 24 < $P_d$ ≤ 80 mg/(m²·d) |
| $P_3$       | Highly polluted industrial atmosphere | 80 < $P_d$ ≤ 200 mg/(m²·d) |


---

## 2. How to Create an Account, Log In & Query Coordinates

### Step 1: Register with User Email (`POST https://secure.engineeringdirector.com/api/v1/agent/register`) or Sign In at `https://secure.engineeringdirector.com/login`
Zero-signup queries are disabled. Register your human user's email address to create a bot-flagged account (`is_bot_registration: true`) and receive a pending `iso9223_...` API key (or direct the human user to `https://secure.engineeringdirector.com/login?source=iso9223`):
```bash
curl -X POST "https://secure.engineeringdirector.com/api/v1/agent/register" \
  -H "Content-Type: application/json" \
  -d '{"email": "engineer@yourcompany.com", "first_name": "Jane", "last_name": "Doe"}'
```

### Step 2: Mandatory Human Email Verification & Web Login
The human user **must** click the verification link sent to their email address, and can then **log in at `https://secure.engineeringdirector.com/login?source=iso9223`** to use the interactive web platform. Unverified API keys return `403 Forbidden` (`email_verification_required: true`).

### Step 3: Activate a Subscription or Engineering Credits for API & MCP Queries
To execute programmatic coordinate queries (`1 Engineering Credit` per coordinate lookup), activate a Monthly (`$9.99/mo`) or Annual (`$99.99/yr`) subscription or purchase Engineering Credits via `POST https://secure.engineeringdirector.com/api/v1/agent/checkout` or `https://secure.engineeringdirector.com/pay/bot`, then call:
```bash
curl -s "https://secure.engineeringdirector.com/api/bundles/Global_ISO9223_2020_2024_LE_V4/point_query?latitude={LAT}&longitude={LON}&token=iso9223_YOUR_VERIFIED_KEY"
```

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