node-sl2format

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node-sl2
========
Module to read .sl2 files, generated by Lowrance chart plotters as a stream.

[![Build Status](https://travis-ci.org/kmpm/node-sl2format.svg?branch=master)](https://travis-ci.org/kmpm/node-sl2format)

For any more information regarding HOW the information is encoded in the file I would from here on
like to redirect to the https://github.com/opensounder/sounder-log-formats repo.

#I/O
Input from for example file stream for an .sl2 file
Outputs block objects looking something like this.
```javascript
{
  frameIndex: 0,
  blockSize: 3216,
  packetSize: 3072,
  lastBlockSize: 0,
  channel: Primary,
  time1: 3536977920,
  waterDepth: 6.622000217437744,
  temperature: 19.350006103515625,
  frequency: 0,
  keelDepth: 0,
  upperLimit: 0,
  lowerLimit: 19.600000381469727,
  altitude: 118.89765930175781,
  heading: 0,
  courseOverGround: 3.7873644828796387,
  waterSpeed: 0,
  gpsSpeed: 2.585312843322754,
  longitude: 1383678,
  latitude: 8147302,
  flags: {
    trackValid: true,
    waterSpeedValid: false,
    positionValid: true,
    waterTempValid: true,
    gpsSpeedValid: true,
    altitudeValid: true,
    headingValid: false
  }
}
```

# File format
* https://github.com/opensounder/sounder-log-formats/blob/master/lowrance/sl-format.md
* http://wiki.openstreetmap.org/wiki/SL2

#Licence
MIT

node-sl2format

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