What are the main differences between these SDI, especially in the level of geospatial features and ease of integration with existing CMS? Cartaro Geonode GeOrchestra EasySDI I wonder for the ...
What geoportals do you know built in commercial environment (ESRI ArcGis Server, Intergraph) and what do you know built with Open Source solutions (like geoserver, mapserver + Open layers)?
GIS users mix spatial data layers from an early age of GI science. What is new in the concept of "mashup"? Is it something really new, or only a trendy word?