VESTRA worked with the City of Redding to migrate their legacy, high usage Enterprise GIS web applications to modern Portal and Web AppBuilder based web apps. The legacy applications used Adobe Flex technology. Besides developing custom Web AppBuilder widgets that support City business processes, VESTRA performed the upgrade of the City’s ArcGIS for Server from version 10.1 to version 10.3.1. The City made the change to migrate to the latest Esri platform and take advantage of the latest functionalities that it provided.