Grails GIS Application -

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i'm working on internal application monitoring outages network national footprint in us. i'm considering overlaying outages region on map. showing outage areas in red example. user clicks on outage area displaying drill down information. technology stack includes grails/jboss/linux. there frameworks provide mapping/gis layer of display on overlay domain specific information? i've looked google map api, unable leverage operates behind firewall. ideas?
in advance,
steve

mapguide open source openlayers ui front end make combination this. there issue finding basemap fits needs of app - data.gov spot information.


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