noseondoreul an bogo bandae banghyangeuro gasseoyo.

를 is the object marker. It marks 노선도 as the thing being looked at.

• 노선도 = route map / line map
• 노선도를 보다 = to look at the route map

So in 노선도를 안 보고, the speaker is saying they did not look at the route map.

안 is a common way to make a verb negative in Korean. It usually goes before the verb.

• 보다 = to see / to look at
• 안 보다 = to not look at

Here, 보다 is changed to the connective form 보고, so:

• 안 보고 = without looking / not looking and...

So 노선도를 안 보고 literally means something like not looking at the route map, ...

보고 is the -고 connective form of 보다. The ending -고 links one action to another, often like and, after, or without depending on context.

In this sentence:

• 노선도를 안 보고
• 반대 방향으로 갔어요

This means the first action/state is connected to the second one: not looking at the route map, (I/they) went in the opposite direction.

So -고 is what lets the sentence flow from one part to the next.

Yes, they are very similar here.

• 안 보고
• 보지 않고

Both can mean without looking / not looking and...

The difference is mostly style and tone:

• 안 보고 is very common and conversational
• 보지 않고 can sound a bit more formal or written

So this sentence could also be said as:

• 노선도를 보지 않고 반대 방향으로 갔어요.

The meaning is basically the same.

반대 방향 means the opposite direction.

• 반대 = opposite
• 방향 = direction

The particle 으로 often marks direction, destination, or movement toward something.

So:

• 반대 방향으로 가다 = to go in the opposite direction

In this sentence, 으로 shows which way the person went.

갔어요 is the past polite form of 가다, which means to go.

Breakdown:

• 가다 = to go
• past stem: 갔-
• polite ending: -어요

So 갔어요 = went

The sentence is describing something that already happened, so the past tense is needed.

Korean often leaves out the subject when it is obvious from context.

So 노선도를 안 보고 반대 방향으로 갔어요 could mean:

• I went in the opposite direction without looking at the route map
• He/She went in the opposite direction without looking at the route map
• We/They went in the opposite direction without looking at the route map

Without more context, the subject is not stated explicitly. In many everyday situations, listeners figure it out from the conversation.

By itself, 안 보고 usually just means didn’t look or went without looking. It does not strongly tell you whether the action was intentional or accidental.

Context decides that.

For example, it could mean:

• they forgot to look
• they did not bother to look
• they chose not to look

So the sentence itself mainly states the fact, not the exact reason.

Yes. Even though Korean does not explicitly use a word like so here, English often does.

A natural English interpretation could be:

• I didn’t look at the route map, so I went in the opposite direction.

This happens because the sequence strongly suggests a connection between the two parts. Korean often leaves that relationship implicit, while English may make it more explicit.

This is an important difference.

• 안 보고 = did not look
• 못 보고 = could not look / was unable to look

So:

• 노선도를 안 보고 = without looking at the route map
• 노선도를 못 보고 = unable to look at the route map

The original sentence uses 안, which focuses on simple negation, not inability.

Not necessarily. 노선도 means a route map or line map, and it is often used for transportation systems such as:

• subway lines
• bus routes
• train lines

So depending on context, it could be a subway map, a train line map, or another transportation route diagram. It is broader than just one specific kind of map.