# Thermal Resistivity of Soils

**URL:** <https://forum.ecmwf.int/t/thermal-resistivity-of-soils/1828>\
**Category:** Open data\
**Tags:** c3s, ecmwf\_open-data, conversion\
**Created:** [10 February 2023 10:05 UTC](https://forum.ecmwf.int/t/thermal-resistivity-of-soils/1828 "2023-02-10T10:05:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sergio\_Montana](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/s/977dab/32.png) [@Sergio\_Montana](https://forum.ecmwf.int/u/Sergio_Montana)\
**Post date:** [10 February 2023 10:05 UTC](https://forum.ecmwf.int/t/thermal-resistivity-of-soils/1828/1 "2023-02-10T10:05:11Z")

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Two questions:

1. Exists a matrix conversion between ECMWF type of soil classification and USDA?
2. I'm trying to calculate or find the Thermal resistivity for Extra-Tropical Soil and tropical Soil, anyone have it?