I'm looking for software for producing a web based map of some 200 - 300 location in Britain. The major requirements are customisable pop up boxes will will scale efficiently on a mobile and contain images. I have tried google maps (see https://mapsengine.google.com/map/viewer?mid=zihxiZSq-Gvk.kU35oasm4XDo click on Norwich for example) but this clearly does not work well in a web browser let alone on a mobile.
I would be grateful for any advice.
Thanks
.kmz
files, it also plays fine with e.g. Google Earth. Might require some hand-work for "customized pop-up boxes" (I did exactly that, basically creating my own "travel guide"). Does that sound like a potential match?