---
title: "Subsurface Petrophysics Lithology"
method: POST
path: "/api/v1/subsurface/petrophysics/lithology"
tags: ["Subsurface Imaging"]
---

# Subsurface Petrophysics Lithology

`POST /api/v1/subsurface/petrophysics/lithology`

## Request

- Base URL: `https://www.deepmapai.com`
- URL: `https://www.deepmapai.com/api/v1/subsurface/petrophysics/lithology`
- Auth: none declared

Classify rock type from geophysical properties.

Uses a decision-tree approach combining Vp, Vs, Vp/Vs ratio,
density, and resistivity to classify lithology into common
rock types (granite, basalt, sandstone, limestone, shale, etc.).
**Pricing:** Included in subscription tiers (legacy list price: GET /api/v1/billing/pricing).

Parameters (JSON body):
- vp_km_s : float -- P-wave velocity in km/s (required)
- vs_km_s : float -- S-wave velocity in km/s (optional)
- density_g_cc : float -- Bulk density in g/cc (optional)
- resistivity_ohm_m : float -- Resistivity in ohm-m (optional)

## Query parameters

- `x_api_key` string, nullable

## Request body

- object

## 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)