# Nitrogen 100-200cm (`Sl7_nitrogen_100_200cm_mean_100_1km0`) — 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**: Nitrogen 100-200cm
- **Slug**: `Sl7_nitrogen_100_200cm_mean_100_1km0`
- **Units**: `cg/kg`
- **Spatial Extent**: UL(82.7192841, -179.999989) to LR(-55.9849262, 179.9987378)
- **Summary**: This raster represents the mean total nitrogen content in soils at a depth of 100–200 cm, expressed in centigrams per kilogram (cg/kg). This unit reflects the mass of nitrogen per unit mass of soil, where 1 cg/kg is equivalent to 10 mg/kg (ppm).
- **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
- `(1.0, (139.0, 69.0, 19.0))`
- `(40.75, (141.1, 70.3, 21.6))`
- `(80.5, (143.2, 71.6, 24.2))`
- `(120.25, (145.3, 72.9, 26.8))`
- `(160.0, (147.4, 74.2, 29.4))`
- `(199.75, (149.5, 75.5, 32.0))`
- `(239.5, (151.6, 76.8, 34.6))`
- `(279.25, (153.7, 78.1, 37.2))`
- `(319.0, (155.8, 79.4, 39.8))`
- `(358.75, (157.9, 80.7, 42.400000000000006))`
- `(398.5, (160.0, 82.0, 45.0))`
- `(398.5, (160.0, 82.0, 45.0))`

This raster represents the mean total nitrogen content in soils at a depth of 100–200 cm, expressed in centigrams per kilogram (cg/kg). This unit reflects the mass of nitrogen per unit mass of soil, where 1 cg/kg is equivalent to 10 mg/kg (ppm).

The data originates from the SoilGrids 250 m product and has been resampled to a 1000 m spatial resolution.

The underlying predictions were generated using a digital soil mapping framework based on Quantile Random Forest models, integrating a global database of soil profile observations with a wide range of environmental covariates (e.g., climate, terrain, vegetation, and land use).

Values represent the average nitrogen concentration within the standardized 100–200 cm soil layer, making the dataset suitable for regional to global-scale analysis of subsurface nutrient distribution. Applications include biogeochemical modeling, agricultural assessment, and environmental or corrosion-related studies.

Reference: Poggio et al., 2021 (SoilGrids 250 m global soil information system).

---

## 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"
```

### Step 4: Plans & Scaling
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- **Pay-As-You-Go Engineering Credits (`$0.250` down to `$0.048`/credit)**: https://secure.engineeringdirector.com/credits
- **Full LLM Documentation**: https://secure.engineeringdirector.com/llms.txt | https://secure.engineeringdirector.com/llms-full.txt | https://secure.engineeringdirector.com/openapi.json