What is a CSV or KML/KMZ File?

CSV (Comma Separated Values)

  • CSV is a file format that stores tabular data in plain text, where each row is a data record, and the fields in each record are separated by commas.  Most spreadsheet and database programs will export tabular data in this format (i.e. MS Excel, MS Access, Open Office Calc, or Google Spreadsheets).
  • CSV files differ from other spreadsheet file types such as .xls or .xlsx in that there can be only one sheet per file,  and specialized style types or formulas cannot be saved.
  • If your data is in a spreadsheet format such as .xls, you can save it as a CSV file for upload into rWAVES by selecting Save As, file type CSV (Comma delimited) (*.csv).

KML (Keyhole Markup Language)

  • KML is an XML (Extensible Markup Language) based file format used to display geographic data in an Earth browser such as Google Earth, Google Maps, and Google Maps Pro. (XML is markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable).
  • A KML file specifies a set of features (placemarks, text descriptions, images, polygons, and so forth) for display on a map. Each location has an associated longitude and latitude.
  • KML is an international standard maintained by the Open Geospatial Consortium, Inc. (OGC). KML was created by Keyhole Inc., the founding company of the Earth Viewer software that Google Earth was built upon.

KMZ (Keyhole Markup Language Zipped)

  • KMZ is a compressed version of a KML file with a .kmz extension. KML files are very often distributed in KMZ files. A KMZ file usually contains a single KML document, invariably named “doc.kml” along with images for overlays and icons it may reference internally.