ggplot2 - Create land surface temperature map in R -

i have csv file containing latitude, longitude , temperature san joaquin valley. want plot latitude , longitude on y , x axes respectively.i want use google base map. temperature @ particular latitude , longitude should plotted surface map shown in image below. please guide me achieve output shown in picture. http://i.stack.imgur.com/r8log.png

thank much.

you can use ggvis make type of map want. need more lat , lon make happen if looking ot have kind of color transition based on prevalence of kind. may in column , tied labeling method.

here solid site started.

ggvis mapping

work through examples figure out happening beneath code before dive right own unless familiar r , ggvis environment.

without starting code base, no 1 going able more this...get started , ask more specific questions.