<p> <I>Crime Index</I> is an estimation of overall level of crime in a given city or a country. We consider crime levels lower than 20 as very low, crime levels between 20 and 40 as being low, crime levels between 40 and 60 as being moderate, crime levels between 60 and 80 as being high and finally crime levels higher than 80 as being very high. <p> <I>Safety index</I> is, on the other way, quite opposite of crime index. If the city has a high safety index, it is considered very safe. <p><i>Is this much less accurate than governmental statistics?</i> In some countries, governments have a detailed statistics based on a number of reported crimes per capita. Those surveys are particular good in comparing crime between two cities in that country, but are not so good in cross country comparison for the following reasons: <ul> <li>people in some countries are much more likely to report a crime than in other countries</li> <li>data could be forged by governmental institutions</li> <li>data are not available for most of the world</li> </ul> <p> Actual formulas to calculate indices are subject to change and at this moment, quite complex empirical formulas are used.
