Delivering Open Data in Wales with the help of Open Source Geo. The Welsh Government is responsible for the managment and publication of Open Data across Wales. The Data Map Wales platform is one of the tactical applications for the Welsh Government. The solution was driven through the use of OSGeo based solution. The key innovative element has been driven in the use of the Geonode combined with spatial functions enabling the maximum re-use of capabilities across the solution This paper will then address the key element of architecture and governance for the implementation of a Spatial Open Architecture; including: -Use of open standards allowing a plug and play architecture where products could be replaced as solution’s requirements evolves -Use of Open Source products reducing initial investment and strengthening the use of Open Standards -Decoupling business logic from the client tier and reducing dependencies on parts of the solution.