The primary source for building footprints, street networks, points of interest, land use zones, water bodies, vegetation, coastlines, and Natura 2000 protected areas. Data is crowd-sourced and continuously updated by a global community of mappers.

Digital Elevation Model (DEM) data used for terrain analysis in fire and flood risk assessments. Provides elevation values at any coordinate, enabling slope and aspect computation using Horn's method. Resolution varies by region (30m SRTM / 90m global).

European Environment Agency's satellite-derived land cover and land use datasets. Includes CORINE Land Cover (CLC), High Resolution Layers for tree cover density, imperviousness, water & wetness, grassland, small woody features, and Natura 2000 land cover classification.

Self-hosted spatial database storing Greek administrative boundaries at the Kallikratis municipality level (Δήμοι). Used for boundary-based clipping of analysis grids, spatial joins with statistical data, and serving GeoJSON to the frontend. Includes GIST spatial indexes for fast containment queries.

Official Greek statistical data on demographics, economics, employment, and social indicators. Data is uploaded to Supabase and joined with municipality boundaries for choropleth mapping. Supports time-series analysis across multiple census years.

Fast routing engine for computing optimal driving routes between locations. Used for the route planning feature — provides turn-by-turn geometry, total distance, and estimated duration based on the OpenStreetMap road network.

OpenStreetMap-based geocoding service that converts place names to coordinates and vice versa. Powers location search in area analysis, fire/flood zone identification, and route endpoint resolution.

Large Language Model API powering natural language understanding, query classification, AI-generated analysis reports, and template suggestions for map exports. Processes user queries to determine intent (area analysis, fire risk, flood risk, routing, data visualization).