GeoMapSuite
GIS & Formats

Keyhole Markup Language (KML / KMZ)

Direct Definition: KML is an XML-based geospatial notation language created for Keyhole (now Google Earth) and maintained by the Open Geospatial Consortium (OGC) to express geographic annotation, 3D building models, and camera perspectives.

Technical Details & Mathematical Formulation

Coordinates in KML are formatted as longitude,latitude,altitude in comma-separated strings. A .kmz file is a standard ZIP archive containing a doc.kml file along with bundled raster icon overlays and texture assets.

What people search for

what is KML, KML file format, open KML, KML vs KMZ, KML coordinates

Common uses

  • Google Earth and Google My Maps layers
  • Sharing points, routes, boundaries, and 3D annotations
  • Moving simple geographic features between mapping applications

Example

A KML Point uses longitude,latitude,altitude, for example -73.9857,40.7484,0—not latitude first.

Common mistakes to avoid

  • Swapping longitude and latitude
  • Saving malformed XML or omitting the KML namespace
  • Expecting plain KML to carry KMZ images and icons
Interactive CalculatorGIS Format Converter

Test real-world coordinates and calculate live results in browser.

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Related Geodetic Concepts

GeoJSON Standard →GPX Track Format →KMZ Archive →
Frequently Asked Questions

People Also Ask About Keyhole Markup Language (KML / KMZ)

Answers to key questions, technical definitions, and practical geodetic applications.

QWhat does the term "Keyhole Markup Language (KML / KMZ)" mean?

KML is an XML-based geospatial notation language created for Keyhole (now Google Earth) and maintained by the Open Geospatial Consortium (OGC) to express geographic annotation, 3D building models, and camera perspectives.

QWhat is the mathematical or technical basis of Keyhole Markup Language (KML / KMZ)?

Coordinates in KML are formatted as longitude,latitude,altitude in comma-separated strings. A .kmz file is a standard ZIP archive containing a doc.kml file along with bundled raster icon overlays and texture assets.

QHow do professionals use Keyhole Markup Language (KML / KMZ) in GIS and surveying?

Cartographers, geospatial software engineers, and navigators utilize Keyhole Markup Language (KML / KMZ) to guarantee mathematical precision and consistent spatial reference frames across global datasets.

QWhich category of geodesy does Keyhole Markup Language (KML / KMZ) belong to?

This concept is cataloged under the "GIS & Formats" domain in the GeoMap Suite cartographic knowledge index.

QCan I test or calculate Keyhole Markup Language (KML / KMZ) on GeoMap Suite?

Yes. You can test live coordinates and see practical examples using our companion GIS Format Converter tool.

QWhat are key concepts related to Keyhole Markup Language (KML / KMZ)?

Directly related terms include GeoJSON Standard, GPX Track Format, KMZ Archive.