Online Map Services use a technology called “tiling”, for generating flexible, dynamic and asynchronous slippy map interfaces.
The Open Geospatial Consortium (OGC) requests reference implementations
of the OGC Web Map Tile Service (WMTS) Interface Standard for use in compliance testing.

A WMTS enabled server application can serve map tiles of spatially referenced data using tile images with predefined content, extent, and
resolution. WMTS is related to the OGC’s Web Map Server (WMS) but is designed to enable better server performance in applications that
involve many simultaneous requests. To improve performance, instead of creating a new image for each request, WMTS returns small
pre-generated images (e.g. PNG or JPEG) or reuses identical previous requests that follow a discrete set of tile matrices.

The OGC Compliance Testing program (CITE) tests whether implementations of OGC standards comply with mandatory elements in the standards. Implementations that pass CITE tests are eligible to pay a Trademark License Fee to use the „Certified OGC Compliant“ brand in packaging and marketing.

Development of abstract and executable tests suites (ETS) for WMTS clients and servers is underway. The current draft of the WMTS
abstract test suite is at

OGC Members with WMTS client and server implementations (and test data if available) are invited to become WMTS CITE Initiative sponsors by making these resources available for free for “black box” testing in WMTS executable test suite development. The first three
implementations to pass 100% of the testing process during the release candidate phase will have their Trademark License Fee waived for their first complete annual licensing period.

The OGC is seeking client implementations that run on a Windows platform or are accessed via the Web.

For more information about this opportunity, please visit or contact: Luis Bermudez,
OGC Director of Interoperability Certification,

About fjbehr

Prof. Dr.-Ing. Franz-Josef Behr, Professor of Geoinformatics at Stuttgart University of Applied Sciences ( His specializations include * Internet, Internet GIS * XML, GML, SVG * Data exchange and Interoperability * Visualization * Open Source Solutions * Consulting Member of the DIN working group NA 005-03-03 AA "Arbeitsausschuss Kartographie und Geoinformation" (Sp CEN/TC 287+ISO/TC 211). He is the author of two authoritative books on GIS in German, one is "Strategisches GIS-Management", published by Wichmann Verlag (2004). The second is "Einführung in Geographische Informationssysteme" (1997).

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