1. Overview

The Open Geospatial Consortium (OGC) is releasing this Call for Participation (CFP) to solicit proposals for the OGC Releasable Basemap Tiles GeoPackage Sprint. This initiative builds on what was accomplished in OGC Vector Tiles Pilots and Testbeds, which resulted in the National System for Geospatial-Intelligence (NSG) Vector Tile Interoperability Standard (VTIS) Volume 1: Network Services, 29 April 2020 (NGA.STND.0075-01_1.0_VTIS). This Sprint is intended to test, implement, and develop a draft specification for the NSG VTIS Volume 2: Basemap Tile Packages (BTP), which stores Mapbox Vector Tiles (MVTs) in a GeoPackage in the World Mercator Projection (EPSG:3395).

RBT stands for Releasable Basemap Tiles. It is a prototype project aimed at creating a set of vector and raster map tiles using open-source data. These tiles are intended to be used as a basemap for US Army, Joint, and Coalition exercises and operations, augmenting and possibly replacing the current CADRG scanned maps.

Releasable Basemap Tiles (RBT) is a prototype project aimed at creating a set of vector and raster map tiles using open-source data. RBT tiles are intended to be used as a basemap for Army, Joint, and Coalition exercises and operations, and is being looked at as a replacement for the current CADRG scanned maps. The RBT prototype builds on other vector tile-related pilots and prototypes sponsored by AGC and National Geospatial-Intelligence Agency (NGA) dating back to 2019.

RBT features and styles are based on the NGA Data Product Specification (DPS) documents associated with the Operational Navigation Chart (ONC)/Topographic Pilotage Chart (TPC), the Joint Operational Graphic (JOG), and the Topographic Map ™.