This document summarizes Inga Bērziņa's presentation on cross-thematic content harmonization in Zemgale Planning Region of Latvia. The region covers 20 counties and 2 cities with a population of over 280,000. A key project involved developing harmonized spatial data and an online portal to promote various land uses and industrial sites. Data from 81 local plans was transformed into a common format and published using OGC standards. Stakeholder feedback found the most useful information for business was land use, infrastructure, and available industrial territories.