Semantic Interoperability in Topographic Mapping: Qualitative Analysis of Land Use and Land Cover Classes Using Discursive Textual
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Abstract
The growing demand for geospatial data integration in Brazil intensifies the challenges of interoperability between cartographic sources, especially for Land Use and Land Cover (LULC) classes in national topographic mapping. This study investigates how conceptual and structural characteristics of the topographic model influence its compatibility with official thematic mappings, with an emphasis on IBGE products. Technical interviews were conducted with 12 experts, including analysts from public institutions responsible for mapping these categories and researchers in the field. The corpus was analysed using Discursive Textual Analysis (DTA), with support from IRaMuTeQ, combining discourse segmentation, lexicometric analyses, and interpretative synthesis by questionnaire dimensions. Based on the findings, a proposal was developed to adapt the conceptual model, represented in OMT-G, with a view to supporting the integration of topographic and thematic products at a scale of 1:25,000. The results indicate semantic divergences, classification gaps and limitations in the multiscale representation of environmental phenomena, with recommendations for adjustments in classes such as ‘Forest,’ ‘Campinarana,’ ‘Exposed Soil’ and ‘Savannah,’ as well as scale-dependent guidelines for humid environments and exposed features. As a contribution, the article systematises recommendations derived from institutional technical knowledge and proposes guidelines for conceptual restructuring aligned with classification clarity, semantic compatibility, and usability in digital contexts. As a follow-up, it is recommended to validate the proposal through pilot application and testing with users and institutions in data integration flows.
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