Identify 2/3 vacation photos, win $5 Starbucks gift card

I have a $5 Starbucks gift card that I simply can't remember to use; I've had it since Christmas. So, I will mail it (within the U.S.A.) to the first commenter who can identify the longitude/latitude (within 5km) where two of these three vacation photos were taken (photos below). ***Update 3/30/2013: locations A and C have been identified***. Each location must be identified by longitude/latitude; names don't count. Here are some short instructions for obtaining longitude/latitude values from Google Maps: 1 2. I know this is a stretch for R-bloggers, but I will be checking longitude/latitude entries using the following R code:

# convert degree, minute, second to decimal
dms2dec <- function(deg, min, sec) deg + (min + sec/60)/60
# convert degrees to radians
d2r <- function(d) d * pi / 180

# compute great circle distance (km) between two coordinates
# given in radians using the Haversine formula
hgcd <- function(lon1, lat1, lon2, lat2) {
    erth <- 6371 # average radius of earth (km)
    dlon <- (lon2 - lon1)
    dlat <- (lat2 - lat1)
    a <- sin(dlat/2)^2 + cos(lat1) * cos(lat2) * sin(dlon/2)^2
    c <- 2 * asin(min(1,sqrt(a)))
    erth * c
Location C (click to enlarge)
Location C (click to enlarge)
Location B (click to enlarge)
Location B (click to enlarge)
Location A (click to enlarge)
Location A (click to enlarge)

3 thoughts on “Identify 2/3 vacation photos, win $5 Starbucks gift card

  1. Fun!
    The first one is Nasau, Bahamas: 25.091818,-77.323151
    The third one is Miami: 25.734344,-80.131531
    Hope you enjoyed the cruise!

    1. Winner!

      The actual coordinates (as reported by my GPS) were:

      Miami: 25.77781, -80.17162
      Nassau: 25.08292, -77.33925

      The R function above (hgcd) indicates that your answer was off by 6.3km in Miami and 1.9km in Nassau. That averages less than 5km. Email me ( with a mailing address, and I'll mail the Starbucks gift card.

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