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# Map Reference
Source code: [map.go](../map.go)
A map stores mapblocks received from server. To be of any use, a map needs to be added to one or more clients. See [comp_map.md](comp_map.md) and [client.md](client.md).
## Functions
`self:block(blkpos)`: Return the `map_blk` at `blkpos` as found in the `blk_data` packet (See [client_pkts.md](client_pkts.md)). `nil` if block is not present.
`self:node(pos)`: Return a node in the form `{ param0 = 126, param1 = 0, param2 = 0, meta = { ... } }`. The meta field is a `node_meta` as found in the `blk_data` packet. `nil` if node is not present.
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