The increasing amount and mobility of data, associated with the heterogeneity of users and uses, influences the complexity of the life cycle of spatial data, placing central importance on the evaluation and management of quality in the processes of capture, management, modelling, editing, publication and sharing of spatial data. This work focuses on the methods and tools currently available to evaluate the external quality of datasets for environmental and ecological monitoring, and presents a novel framework that allows integrating and interconnecting spatial data quality evaluation with metadata geoportals in WebGIS platforms, facilitating evaluation by users with often limited expertise in this field. The work was developed in the context of the FP7 project BIO_SOS (Biodiversity Multisource Monitoring System: from Space TO Species).