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|Definitionskos:definition||Tiled feature data, colloquially referred to as 'vector tiles', can be used to optimize the delivery of vector data over the web. This data may subsequently be used to support visualization (particularly through maps) as well as limited analysis activities. One goal of the OGC Vector Tiles Pilot was to define candidate extensions to existing OGC standards as a way to advance the use of vector tiles technology as part of the OGC baseline. This Engineering Report (ER) describes a set of possible extensions to GeoPackage 1.2 that documents the mechanism to store and retrieve vector tiles in a GeoPackage. These extensions work together to enable a GeoPackage to act as a container format that can support visualization and analysis activities, even in a Denied, Degraded, Intermittent, or Limited Bandwidth (DDIL) environment.The GeoPackage Vector Tiles extensions define the rules and requirements for encoding vector tiles in a GeoPackage data store. There are five draft extensions:The Vector Tiles Extension provides vector tiles support through the GeoPackage tiles option.The Mapbox Vector Tiles Extension allows the content of a tile Binary Large OBject (BLOB) to be a Mapbox Vector Tile as per version 2.1 of the Mapbox Vector Tile (MVT) specification .The GeoJSON Vector Tiles Extension allows the content of each tile BLOB to be a GeoJSON file.The OGC Web Services (OWS) Context Extension provides a way to store information describing a list of geospatial resources, including but not limited to maps, their layers, and the styles of those layers.The Vector Tiles Attributes Extension allows attribute information for each feature to be stored in relational tables for more convenient querying.To support vector tiles, a minimum of at least two extensions is required. The first extension enables vector tiles support. However, to be usable, an encoding format must be declared via either the second or third extension. The other extensions are purely optional.These extensions, like all GeoPackage extensions, are intended to be transparent and to not interfere with GeoPackage-compliant, but non-supporting, software packages.|
|labellabel||OGC Vector Tiles Pilot: GeoPackage 1.2 Vector Tiles Extensions Engineering Report|
|Alternative LabelaltLabel||GeoPackage 1.2 Vector Tiles Extensions Engineering Report|
|OGC document typedoctype||Public Engineering Report|