# CSV export

Since the Surveyor is a multi-beam echo sounder, each time we emit a sonar pulse, we receive multiple signals and combine them to get multiple beams. Each ping consists of multiple “detections” and each detection is a row in the CSV.

Some data is per-detection, and some is per-ping.

The following columns are presented in CSV export:

| column                 | notes                                                                                                                       |
| ---------------------- | --------------------------------------------------------------------------------------------------------------------------- |
| latitude               | detection's geodetic latitude in decimal degrees north of equator (or negative south)                                       |
| longitude              | detection's geodetic longitude in decimal degrees east of prime meridian (or negative west)                                 |
| altitude (m)           | height of detected point above sensor. Will be negative.                                                                    |
| northing (local m)     | detection's Cartesian position in meters north. Relative to an arbitrary origin.                                            |
| easting (local m)      | detection's Cartesian position in meters east. Relative to an arbitrary origin.                                             |
| ping number            | sequence number of the ping which produced this data. Each ping has multiple detections, and thus multiple rows in the CSV. |
| elapsed (s)            | time the ping was sent, in seconds since the session started                                                                |
| datetime               | time the ping was sent, in UTC                                                                                              |
| altitude (m above MSL) | Altitude of the point relative to Mean Sea Level                                                                            |
| northing (UTM m)       | detection's georeferenced Cartesian position                                                                                |
| easting (UTM m)        | detection's georeferenced Cartesion position                                                                                |
| coordinate projection  | Which UTM zone the georeferenced coordinates are in                                                                         |

Positions are represented as Local Cartesian Coordinates (x,y,z). x=north, y=east, z=down.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ceruleansonar.com/c/surveyor-240-16/integration-with-bathymetric-software/csv-export.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.