in the earlier i've been post about creating custom map with kml

now i introduce you to a digitizer tool - online google maps tool

try to make a marker, line, polygon and see the generate code

if you interest with KML you can learn the code..

This is what you can do:
1. create marker
2. draw a polyline (measure the distant)
3. draw a polygon (measure the area)
4. draw a circle
5. change the style (line and poygon style)
6. generate the code (KML complete, KML coordinate and Javascript)

this is the link, enjoy it..
Online digitizer tool