SensLog is a server-side platform for ingesting, managing, and publishing sensor data from diverse sources, including environmental, geospatial, and citizen-generated (VGI) observations. Developed as part of the SDI4Apps initiative, it supports a structured data model and provides APIs for integrating sensor networks into geospatial applications. The system supports PostgreSQL/PostGIS for spatial storage, and includes Java and JavaScript components to enable extensible sensor data workflows. SensLog aims to bridge IoT and spatial data infrastructures in smart environments, including agriculture, transport, and environmental monitoring.