Overture Maps - Base

The Overture base theme provides the land and water features that are necessary to render a complete basemap. These features are currently derived from the Daylight Earth Tables schema and include the Daylight Coastlines. - 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. Current types: - **bathymetry**: derived vectorized bathymetric data products from [ETOPO1](https://www.ncei.noaa.gov/products/etopo-global-relief-model) and [GLOBathy](https://www.nature.com/articles/s41597-022-01132-9) 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](https://esa-worldcover.org/en), 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. Founded in 2022 under the Joint Development Foundation, Overture Maps Foundation (Overture Maps) is dedicated to the development of reliable, easy-to-use, and interoperable open map data that will power current and next-generation map products. We build this data through a collaborative process that combines technology, data, and support from a wide range of companies. Map data are assembled from multiple sources including members, civic organizations, and open data sources. Overture's data themes and schema are licensed under CC-BY 4.0. GERS IDs are licensed under CDLA Permissive v 2.0. Data associated with the themes through GERS can carry different licenses. However, if the data associated though GERS with an ODbL licensed theme constitutes a derivative dataset, it must be licensed under ODbL. See OpenStreetMap Community Guidelines for definitions of a derivative database. This data is processed, onboarded and maintained by CARTO in collaboration with the Overture Maps Foundation.Overture 基础主题集提供了绘制完整底图所需的陆地与水域要素。当前此类要素源自Daylight Earth Tables架构，并包含Daylight海岸线数据集。 - 酌情将要素按类型、子类型与类别进行基础分类； - 对高度（height）、高程（ele）等常见OpenStreetMap（OSM）标签进行解析与归一化处理； - 提取标准化OSM标签，例如将wikidata关联为顶层属性； - 直接透传其余相关OSM标签。 当前支持的要素类型如下： - **水深测量（bathymetry）**：源自[ETOPO1](https://www.ncei.noaa.gov/products/etopo-global-relief-model)与[GLOBathy](https://www.nature.com/articles/s41597-022-01132-9)数据集的矢量化水深数据产品； - **基础设施（infrastructure）**：取自OpenStreetMap的通信基站与线路、码头、桥梁等基础设施要素； - **陆地（land）**：基于OSM海岸线反推得到的陆地表面物理表征，转换自OpenStreetMap的自然要素标签； - **土地覆盖（land_cover）**：源自[ESA WorldCover](https://esa-worldcover.org/en)的高分辨率光学地球观测数据； - **土地利用（land_use）**：针对区域土地的人类使用场景开展分类，转换自OpenStreetMap的landuse标签； - **水域（water）**：内陆与海洋水域表面的物理表征，转换自OpenStreetMap的自然要素与水道标签。 Overture地图基金会（Overture Maps Foundation）于2022年在联合开发基金会（Joint Development Foundation）框架下成立，致力于开发可靠、易用且具备互操作性的开放地图数据，为当前及下一代地图产品提供底层支撑。我们通过融合多方技术、数据与企业支持的协作流程构建此类数据，地图数据整合自会员单位、公益组织及开放数据源等多类渠道。 Overture的数据主题与架构采用CC-BY 4.0许可协议。GERS标识符采用CDLA Permissive v 2.0许可协议。通过GERS关联至主题的数据可采用不同许可协议。但若通过GERS与ODbL许可主题关联的数据构成衍生数据集，则必须以ODbL协议进行许可。有关衍生数据库的定义，请参阅OpenStreetMap社区指南。 本数据集由CARTO与Overture地图基金会合作完成处理、接入与维护工作。

搜集汇总

背景与挑战

背景概述

Overture Maps - Base数据集包含基础地图渲染所需的陆地和海洋特征，涵盖水深测量、基础设施、陆地等七种类型，数据源自ETOPO1、GLOBathy等开放数据源并经过标准化处理。该数据集由Overture Maps Foundation与CARTO合作维护，采用CC-BY 4.0等开放许可协议。