error Cannot read property ‘split’ of undefined

I work on angular 7

I get error

ERROR TypeError: Cannot read property 'split' of undefined
at managelocations.component.ts:120
at Array.forEach ()
at SafeSubscriber._next (managelocations.component.ts:117)
at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.__tryOrUnsub (Subscriber.js:196)
at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.next (Subscriber.js:134)

error come from this line below :

console.log (dataLocation);

5.2951916,100.28825170000005

How to solve this problem