Yandex map of Piaui region: distance measurement; change of map scale; make a route; in most sities, towns, and some villages - allow address search by street (square, avenue, highway) name and house number; change a view mode between scheme and satellite photos.
You can get the link to visible map region. By sending them to another person via E-mail, ICQ, SMS or placing on web site, you can show, for examle: meeting place, address of delivery, airport, market, railway station or other object location. Who open the link - by cross determine the location.
To change map scale - use mouse weel, toddler "+ -" on the left, or scale button on the top-left corner of map area; to switch to view from satellite - use menu on the top-right corner; to measure the distance - click the ruler button on map right bottom corner, and poly route points by clicking on the map area.
See also capital of Piaui region: Teresina map