For those who are facing an issue similar to this, the reason that the bindings are failing here is because there is an assumption that there is actually a value at element 0 of the array. If the array is null then obviously there can't be an element 0. The way to work around this is to add the check for a null element in here like this
Latitude & Longitude:-{{SingleCountryData && SingleCountryData[0].latlng}}
An alternative would be to wrap the text portion inside something like a span and use
*ngIf
to control its evaluation.