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GeoJSON Vector Tiles Extension

Extension Title

GeoJSON Vector Tiles

Introduction

The GeoPackage Vector Tiles extension defines the rules and requirements for encoding vector tiles in a GeoPackage data store using The GeoJSON Format.

This extension, like all GeoPackage extensions, is intended to be transparent and to not interfere with GeoPackage-compliant, but non-supporting, software packages.

Extension Author

Image Matters LLC, in collaboration with the participants of the OGC Vector Tiles Pilot.

Extension Name or Template

im_vector_tiles_geojson (If this extension is adopted by OGC, then gpkg_geojson_vector_tiles will be named as an alias.)

Extension Type

This extension defines an encoding for the Vector Tiles Extension.

Applicability

This extension defines a specific encoding for Vector Tiles in a GeoPackage.

Scope

read-write

Specification

If this extension is in use, then all of the Vector Tiles Extension applies.

User Data Tables

Like other tile-based content, the physical data is stored in a GeoJSON Feature Collection.

gpkg_extensions

To use this extension, add a row to this table for each tile pyramid user data table.

Table 1. gpkg_extensions Table Rows
table_name column_name extension_name definition scope

tile pyramid user data table name

tile_data

im_vector_tiles_geojson

a reference to this file

read-write

Note

The values in the definition column SHOULD refer in some human-readable way to this extension specification. If the extension is adopted by OGC, it will gain the "gpkg_" prefix and get a different definition permalink.

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