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Keyhole Markup Language
Keyhole Markup Language
Published: 2014/10/08
Channel: Audiopedia
KML or KMZ Tutorial
KML or KMZ Tutorial
Published: 2013/04/15
Channel: ultari
Keyhole Markup Language (KML) , SEO & Local Site Maps - Add Business Fundimentals Series 3 of 3
Keyhole Markup Language (KML) , SEO & Local Site Maps - Add Business Fundimentals Series 3 of 3
Published: 2014/10/20
Channel: Richard Key
KML Creator. Convierte (GIS ESRI) Shapefile a KML (Keyhole Markup Language) de Google Earth
KML Creator. Convierte (GIS ESRI) Shapefile a KML (Keyhole Markup Language) de Google Earth
Published: 2013/12/23
Channel: pinyeti
KML Tutorial Part 1 Udemy Free Course
KML Tutorial Part 1 Udemy Free Course
Published: 2015/10/28
Channel: Nile Geospatial
KMLPointsLayer - decorating a Codename One map using Keyhole Markup Language (KML)
KMLPointsLayer - decorating a Codename One map using Keyhole Markup Language (KML)
Published: 2012/05/24
Channel: 1815750
Keyhole Markup Language
Keyhole Markup Language
Published: 2016/01/08
Channel: WikiAudio
GeoTools, Geographic, DWG2KML Google Earth KML/Z Export
GeoTools, Geographic, DWG2KML Google Earth KML/Z Export
Published: 2016/09/10
Channel: Rakesh Rao
How to Import KML file from Google Earth into ArcGIS as a Shapefile || Google Earth and GIS
How to Import KML file from Google Earth into ArcGIS as a Shapefile || Google Earth and GIS
Published: 2017/10/03
Channel: BEST SOLUTION LINE
Volo App Engine #4 - How to create an open App and use a "KMZ" (Keyhole Markup Language) Connection
Volo App Engine #4 - How to create an open App and use a "KMZ" (Keyhole Markup Language) Connection
Published: 2013/10/22
Channel: Volo App Engine
New Google Earth App import KML KMZ files
New Google Earth App import KML KMZ files
Published: 2017/04/20
Channel: Mike Downes
Sharing your data in Google Earth with KML - 360cities
Sharing your data in Google Earth with KML - 360cities
Published: 2008/06/04
Channel: Google Developers
HOW TO CREATE A KML FILE 1
HOW TO CREATE A KML FILE 1
Published: 2014/03/20
Channel: Michael Atchison
Convert Geotagged Pics to .KMZ file Free on Mac
Convert Geotagged Pics to .KMZ file Free on Mac
Published: 2012/03/14
Channel: aMacxd
XML: Google Earth & KML Files
XML: Google Earth & KML Files
Published: 2011/07/25
Channel: Educator.com
Generating KML from Google Maps
Generating KML from Google Maps
Published: 2008/10/26
Channel: 3DWorldWSC
Learn Google Earth: Importing KML, KMZ and GPS Data
Learn Google Earth: Importing KML, KMZ and GPS Data
Published: 2010/08/25
Channel: Google Earth
How to merge multiple KML/GeoJSON/Shapefile into one file?
How to merge multiple KML/GeoJSON/Shapefile into one file?
Published: 2017/03/10
Channel: Punwath Prum
How to create a kml or kmz file
How to create a kml or kmz file
Published: 2016/03/10
Channel: Michael Atchison
Converting Google Earth kml To GARMIN GPS devices gpx
Converting Google Earth kml To GARMIN GPS devices gpx
Published: 2017/08/19
Channel: Géo Tech
How to Import KML file into google map
How to Import KML file into google map
Published: 2017/06/24
Channel: VDO Share
What Is A KML File?
What Is A KML File?
Published: 2017/07/19
Channel: HI sparky
KML Tutorial Part 2
KML Tutorial Part 2
Published: 2015/10/28
Channel: Nile Geospatial
create kmz files using google earth
create kmz files using google earth
Published: 2014/08/12
Channel: ruelzski
Edit KML files using XML editor
Edit KML files using XML editor
Published: 2017/04/22
Channel: Sourabh Bora
Merging Files in Google Earth Pro
Merging Files in Google Earth Pro
Published: 2016/09/02
Channel: Rezwan Ahmed Rahad
KML gneration from field data
KML gneration from field data
Published: 2017/02/13
Channel: FarmerBrianTee
2  Open KMZ file
2 Open KMZ file
Published: 2013/08/20
Channel: Suha Al-Nasrallah
How to make a KML file in Google Earth
How to make a KML file in Google Earth
Published: 2012/05/24
Channel: Duke Productions
How to make KML File in Google earth
How to make KML File in Google earth
Published: 2016/11/08
Channel: Rainfine Education Program
KML: Fills
KML: Fills
Published: 2015/12/14
Channel: Traverse PC
BGL Boundaries to kml Quick preview
BGL Boundaries to kml Quick preview
Published: 2017/11/18
Channel: Vogel
Edit .GPX file (.KMZ output) on Mac-Google Earth
Edit .GPX file (.KMZ output) on Mac-Google Earth
Published: 2016/06/11
Channel: TheAppCut
Shapefile to KML with Shape2Earth
Shapefile to KML with Shape2Earth
Published: 2012/04/16
Channel: Tim Beermann
StrikeLines 1: Excel to GPX/KML
StrikeLines 1: Excel to GPX/KML
Published: 2015/01/14
Channel: StrikeLines Travis
QGIS KML Gmaps
QGIS KML Gmaps
Published: 2015/04/15
Channel: Journo Tech Sheffield
Google Earth KMZ
Google Earth KMZ
Published: 2013/06/10
Channel: LRDeltaPlastics
MapRight - Upload KML
MapRight - Upload KML
Published: 2016/04/20
Channel: Steve Roberson
KML Files: Introduction to Polygons
KML Files: Introduction to Polygons
Published: 2013/11/22
Channel: Noob Developer
Google Maps iPad KMZ File
Google Maps iPad KMZ File
Published: 2012/09/13
Channel: Clay Reisler
Open KML Files with Fishing Status for Android and Google Earth
Open KML Files with Fishing Status for Android and Google Earth
Published: 2015/07/31
Channel: Fishing Status
Arc Toolbox 8 - Convert Shapefile To KML
Arc Toolbox 8 - Convert Shapefile To KML
Published: 2017/05/11
Channel: GIS 4 YOU
How to make KMZ or KML file in Google Earth
How to make KMZ or KML file in Google Earth
Published: 2013/04/30
Channel: dkrsingh1
How to export data from kml to excel manual
How to export data from kml to excel manual
Published: 2015/08/24
Channel: Dendy R
Google Maps - How to Import KML File into New Google Maps
Google Maps - How to Import KML File into New Google Maps
Published: 2014/06/19
Channel: CodeCowboyOrg
Kml tae
Kml tae
Published: 2014/01/28
Channel: Tonysha Mccarthy
Search for railway data within KML and KMZ files
Search for railway data within KML and KMZ files
Published: 2015/01/29
Channel: KML Search Tool
Convert Google Earth Path to GPX Route
Convert Google Earth Path to GPX Route
Published: 2017/04/05
Channel: David Burch
420 kml wellness
420 kml wellness
Published: 2017/04/24
Channel: Joseph El Jefe
Arduino GPS Tracker with KML File
Arduino GPS Tracker with KML File
Published: 2015/03/04
Channel: Paul McWhorter
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from KML)
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Keyhole Markup Language
Keyhole Markup Language.png
Filename extensions .kml, .kmz
Internet media type
  • application/vnd.google-earth.kml+xml
  • application/vnd.google-earth.kmz
Developed by Keyhole, Inc., Google
Type of format Geographic information system
Extended from XML

Keyhole Markup Language (KML) is an XML notation for expressing geographic annotation and visualization within Internet-based, two-dimensional maps and three-dimensional Earth browsers. KML was developed for use with Google Earth, which was originally named Keyhole Earth Viewer. It was created by Keyhole, Inc, which was acquired by Google in 2004. KML became an international standard of the Open Geospatial Consortium in 2008.[1][2] Google Earth was the first program able to view and graphically edit KML files. Other projects such as Marble have also started to develop KML support.[3]

Structure[edit]

The KML file specifies a set of features (place marks, images, polygons, 3D models, textual descriptions, etc.) for display in Here Maps, Google Earth, Maps and Mobile, or any other geospatial software implementing the KML encoding. Each place always has a longitude and a latitude. Other data can make the view more specific, such as tilt, heading, altitude, which together define a "camera view" along with a timestamp or timespan. KML shares some of the same structural grammar as GML. Some KML information cannot be viewed in Google Maps or Mobile.[4]

KML files are very often distributed in KMZ files, which are zipped KML files with a .kmz extension. These must be legacy (ZIP 2.0) compression compatible (i.e. stored or deflate method), otherwise the .kmz file might not uncompress in all geobrowsers.[5] The contents of a KMZ file are a single root KML document (notionally "doc.kml") and optionally any overlays, images, icons, and COLLADA 3D models referenced in the KML including network-linked KML files. The root KML document by convention is a file named "doc.kml" at the root directory level, which is the file loaded upon opening. By convention the root KML document is at root level and referenced files are in subdirectories (e.g. images for overlay images).[6]

An example KML document is:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<Placemark>
  <name>New York City</name>
  <description>New York City</description>
  <Point>
    <coordinates>-74.006393,40.714172,0</coordinates>
  </Point>
</Placemark>
</Document>
</kml>

The MIME type associated with KML is application/vnd.google-earth.kml+xml; the MIME type associated with KMZ is application/vnd.google-earth.kmz.

Geodetic reference systems in KML[edit]

For its reference system, KML uses 3D geographic coordinates: longitude, latitude and altitude, in that order, with negative values for west, south and below mean sea level if the altitude data is available. The longitude, latitude components (decimal degrees) are as defined by the World Geodetic System of 1984 (WGS84). The vertical component (altitude) is measured in meters from the WGS84 EGM96 Geoid vertical datum. If altitude is omitted from a coordinate string, e.g. (-77.03647, 38.89763) then the default value of 0 (approximately sea level) is assumed for the altitude component, i.e. (-77.03647, 38.89763, 0).

A formal definition of the coordinate reference system (encoded as GML) used by KML is contained in the OGC KML 2.2 Specification. This definition references well-known EPSG CRS components.[7]

OGC standard process[edit]

The KML 2.2 specification was submitted to the Open Geospatial Consortium to assure its status as an open standard for all geobrowsers. In November 2007 a new KML 2.2 Standards Working Group was established within OGC to formalize KML 2.2 as an OGC standard. Comments were sought on the proposed standard until January 4, 2008,[8] and it became an official OGC standard on April 14, 2008.[9]

The OGC KML Standards Working Group finished working on change requests to KML 2.2 and incorporated accepted changes into the KML 2.3 standard.[10] The official OGC KML 2.3 standard was published in August 4, 2015.[11]

See also[edit]

References[edit]

  1. ^ OGC® Approves KML as Open Standard | OGC(R)
  2. ^ Kml | Ogc(R)
  3. ^ KML Support in Marble
  4. ^ "Can Google Maps read the KML files I've made for Google Earth?". Google. Retrieved 2009-06-15. 
  5. ^ "Viewing data from Google Earth". Google. Retrieved 2013-04-07. 
  6. ^ "KMZ Files". Google. Retrieved 2009-12-16. 
  7. ^ Wilson, Tim, ed. (2008-04-14). OGC KML. Open Geospatial Consortium, Inc. p. 14. Retrieved 9 June 2015. 
  8. ^ "The OGC Seeks Comment on OGC Candidate KML 2.2 Standard" (Press release). Open Geospatial Consortium, Inc. 2007-12-04. Retrieved 2007-12-10. 
  9. ^ Shankland, Stephen (2008-04-14). "Google mapping spec now an industry standard". CNET. Retrieved 2008-04-14. 
  10. ^ "OGC KML 2.3 SWG". OGC. Retrieved 2013-10-07. 
  11. ^ "OGC KML 2.3 Standard". OGC. Retrieved 2015-08-04. 

External links[edit]

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