Custom post type sender form with geolocation info (custom tax and post meta):
( Its Turkish language but you can use translate in top right corner if u want )
First Input is a custom input. First you selecting city from drop-down list and region section is coming via ajax query. Both city and region lists are 1 custom taxonomy and region lists are child of city that selected. Then you writing a value to Avenue / Street section.. Street name for example. When you click load button, system querying google maps with city + region + street name you entered and loading on map below.
When saving: city + region values saving as custom taxonomy and location coordinates saving as post meta data.
Example post created from that form:
(You can mouser hover on map icon, probably that example will delete soon)
I believe this is a good usage for real estate websites that using custom post type and want to get property info from forms.