What a geoportal costs: scope the system before asking for a number
How to estimate a geoportal from data, users, functions, integrations, security, availability and operations without publishing universal prices.
WEBGIS
Everything published under WEBGIS.
Sustainable WebGIS architecture: five layers beyond a disposable viewer
Data, service, application, security and operations design that lets a geoportal change its interface without rebuilding rules or sources.