Base

Overview

The Overture Maps base theme provides the land, water, infrastructure, and bathymetry features that are necessary to render a complete basemap. The majority of these features come from OpenStreetMap. We classify OSM features into type, subtype, and class based on their tags. The land and ocean polygons are derived from the Daylight Coastlines. The theme includes six feature types:

• bathymetry: derived vectorized bathymetric data products from ETOPO1 and GLOBathy data.
• infrastructure: Infrastructure features such as communication towers and lines, piers, and bridges from OpenStreetMap.
• land: physical representations of land surfaces derived from the inverse of OSM Coastlines; translates natural tags from OpenStreetMap.
• land_cover: derived from ESA WorldCover, high-resolution optical Earth observation data.
• land_use: classifications of the human use of a section of land; translates landuse tag from OpenStreetMap.
• water: physical representations of inland and ocean marine surfaces; translates natural and waterway tags from OpenStreetMap.

Schema design choices

• basic classification of features into type, subtype and class where appropriate.
• parsing and normalization of common OSM tags, such as height and ele.
• extraction of consistent OSM tags, such as wikidata to top-level properties.
• direct pass-through of remaining relevant OSM tags.

Schema reference

• Explore the schema for the bathymetry feature type.
• Explore the schema for the infrastructure feature type.
• Explore the schema for the land feature type.
• Explore the schema for the land cover feature type.
• Explore the schema for the land use feature type.
• Explore the schema for the water feature type.