The Google Chart option under the āVisualizeā section in Kreport is a great feature, allowing you to create various chart types such as Area, Stepped Area, Bar, Column, Line, and Pie. However, there are additional chart types that it could support, like the Sankey chart, which still need to be implemented.
For the Google Maps option, you need to select the longitude and latitude fields. Additionally, there are options for pin info, as well as color settings for markers and clusters on the map. These features still need to be implemented.
The Kreport developer has added many of these features, but they have integrated them into their own CRM, SpiceCRM, which includes the Kreport tool. You can find more details by watching the following videos: