---
title: "Radiometric Geological Classification"
method: GET
path: "/api/v1/usgs-radiometric/geological-classification"
tags: ["usgs-radiometric"]
---

# Radiometric Geological Classification

`GET /api/v1/usgs-radiometric/geological-classification`

## Request

- Base URL: `https://www.deepmapai.com`
- URL: `https://www.deepmapai.com/api/v1/usgs-radiometric/geological-classification`
- Auth: none declared

Geological rock type classification from K/Th/U ratios.

Classifies geological substrate from radiometric ratios:
Th/K > 3.5 = felsic, 1.5-3.5 = intermediate, < 1.5 = mafic,
< 0.5 = ultramafic.  Also estimates radon potential from eU
concentration.

**Pricing:** Included in subscription tiers (legacy list price: GET /api/v1/billing/pricing).

## Query parameters

- `lat` number, required: Latitude (WGS84)
- `lon` number, required: Longitude (WGS84)
- `radius_km` number: Search radius in km
- `x_api_key` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/deepmapai/apis/deepmap-ai.md) · [All operations](https://skmtc.dev/deepmapai/apis/deepmap-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/deepmapai/apis/deepmap-ai/revisions/dab995d977d0?raw)