var allcoords = [[[-88.1468296051028,41.7186711218354],[-88.13618659973199,41.706369299646525],[-88.17154884338403,41.71034202043927],[-88.16914558410693,41.7196961674112],[-88.1468296051028,41.7186711218354]]];
var coords = allcoords[0];
var minLat = 999999;
var maxLat = -999999;
var minLon = 999999;
var maxLon = -999999;
var i = 0;
for (i = 0; i < coords.length; i++) {
if (coords[i][0] < minLon){
minLon = coords[i][0];
}
if (coords[i][0] > maxLon){
maxLon = coords[i][0];
}
if (coords[i][1] < minLat){
minLat = coords[i][1];
}
if (coords[i][1] > maxLat){
maxLat = coords[i][1];
}
}
console.log(minLat+":"+maxLat+":"+minLon+":"+maxLon)
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