Some questions on the mapping package

[Julie Morin-Rivat]

Dear all,

I am trying to map a set of 25 dates. The dated events are in Africa. I also would like to visualize the changes in spatial occupation through time.

1) Could you tell me please how to include a map in the visualization?

2) Here are the codes I use, but I am not sure they are correct:

Plot()

{

R_Date("Poz-62641", 1805,30)

{

longitude= 10.434;

latitude= 2.303;

R_Date("Poz-62642", 2250,30)

{

longitude= 10.429;

latitude= 2.299;

R_Date("Poz-62644", 2230,30)

{

longitude= 10 10.427;

latitude= 2.297;

R_Date("Poz-49335", 1540,30)

{

longitude= 10.424;

latitude= 2.293;

R_Date("Poz-62645", 780,30)

{

longitude= 10.422;

latitude= 2.292;

R_Date("Poz-49330", 145,30)

{

longitude= 10.420;

latitude= 2.290;

R_Date("Poz-62646", 1870,30)

{

longitude= 10.416;

latitude= 2.286;

R_Date("Poz-62647", 1810,30)

{

longitude= 10.570;

latitude= 2.434;

R_Date("Poz-62648", 1960,30)

{

longitude= 10.574;

latitude= 2.435;

R_Date("Poz-49334", 150,25)

{

longitude= 10.578;

latitude= 2.436;

R_Date("Poz-62649", 1655,30)

{

longitude= 10.580;

latitude= 2.436;

R_Date("Poz-62650", 1705,30)

{

longitude= 10.582;

latitude= 2.437;

R_Date("Poz-62651", 1860,30)

{

longitude= 10.588;

latitude= 2.438;

R_Date("Poz-49331", 1750,35)

{

longitude= 10.593;

latitude= 2.439;

R_Date("Poz-62653", 1865,30)

{

longitude= 10.651;

latitude= 2.457;

R_Date("Poz-62654", 1660,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-49323", 260,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-49324", 1810,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-49327", 2160,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-49328", 2005,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-49329", 2090,30)

{

longitude= 10.653;

latitude= 2.457;

R_Date("Poz-62655", 1495,30)

{

longitude= 10.664;

latitude= 2.459;

R_Date("Poz-62656", 625,30)

{

longitude= 10.667;

latitude= 2.460;

R_Date("Poz-49333", 1790,30)

{

longitude= 10.667;

latitude= 2.460;

R_Date("Poz-62657", 1720,30)

{

longitude= 10.672;

latitude= 2.461;

};

Thank you for your help,

Julie