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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
GeoTools, Geographic, DWG2KML Google Earth KML/Z Export
GeoTools, Geographic, DWG2KML Google Earth KML/Z Export
Published: 2016/09/10
Channel: Rakesh Rao
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
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
KML Tutorial Part 1 Udemy Free Course
KML Tutorial Part 1 Udemy Free Course
Published: 2015/10/28
Channel: Nile Geospatial
Creating KML Navigation Buttons
Creating KML Navigation Buttons
Published: 2008/09/17
Channel: Google Developers
Keyhole Markup Language
Keyhole Markup Language
Published: 2016/01/08
Channel: WikiAudio
Annotate Google Earth
Annotate Google Earth
Published: 2009/05/13
Channel: Earth Outreach
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
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
Edit KML files using XML editor
Edit KML files using XML editor
Published: 2017/04/22
Channel: Sourabh Bora
New Google Earth App import KML KMZ files
New Google Earth App import KML KMZ files
Published: 2017/04/20
Channel: Mike Downes
WebFlightPath.com Google Earth KML/KMZ howto
WebFlightPath.com Google Earth KML/KMZ howto
Published: 2017/07/24
Channel: Rural Geek
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
XML: Google Earth & KML Files
XML: Google Earth & KML Files
Published: 2011/07/25
Channel: Educator.com
How to Import KML file into google map
How to Import KML file into google map
Published: 2017/06/24
Channel: VDO Share
How to make KML File in Google earth
How to make KML File in Google earth
Published: 2016/11/08
Channel: Rainfine Education Program
How to create a kml or kmz file
How to create a kml or kmz file
Published: 2016/03/10
Channel: Michael Atchison
How to export KML file from genex asisstant
How to export KML file from genex asisstant
Published: 2016/02/11
Channel: Vuthy Ry
Convert Shapefile to Kml
Convert Shapefile to Kml
Published: 2017/08/31
Channel: GIS Tube
What Is A KML File?
What Is A KML File?
Published: 2017/07/19
Channel: HI sparky
GPS to KML
GPS to KML
Published: 2010/09/04
Channel: Dario Pinturić
Generating KML from Google Maps
Generating KML from Google Maps
Published: 2008/10/26
Channel: 3DWorldWSC
HOW TO CREATE A KML FILE 1
HOW TO CREATE A KML FILE 1
Published: 2014/03/20
Channel: Michael Atchison
create kmz files using google earth
create kmz files using google earth
Published: 2014/08/12
Channel: ruelzski
kml in arcgis
kml in arcgis
Published: 2017/06/14
Channel: Computer Scientist
Tutorial: Practice Correcting Errors in Your KML With jEdit
Tutorial: Practice Correcting Errors in Your KML With jEdit
Published: 2007/06/24
Channel: Earth Outreach
Importing KML into Google Earth
Importing KML into Google Earth
Published: 2012/03/07
Channel: Antonio Medrano
How to convert KMZ to KML
How to convert KMZ to KML
Published: 2017/05/24
Channel: MyGeodata Cloud
KML After Party 3 || Kaba Modern
KML After Party 3 || Kaba Modern
Published: 2017/08/10
Channel: KM Legacy
KML Search Tool - How to search for earthquakes
KML Search Tool - How to search for earthquakes
Published: 2014/03/24
Channel: KML Search Tool
StrikeLines 1: Excel to GPX/KML
StrikeLines 1: Excel to GPX/KML
Published: 2015/01/14
Channel: StrikeLines Travis
Google Earth Making KML/KMZ
Google Earth Making KML/KMZ
Published: 2008/02/13
Channel: calculmikan
KML gneration from field data
KML gneration from field data
Published: 2017/02/13
Channel: FarmerBrianTee
GeoDash 4 - Google Maps Features and KML Layers
GeoDash 4 - Google Maps Features and KML Layers
Published: 2017/04/18
Channel: Project X Labs Ltd.
SHAPE TO KML FORMAT
SHAPE TO KML FORMAT
Published: 2009/04/15
Channel: GTekAccount
2  Open KMZ file
2 Open KMZ file
Published: 2013/08/20
Channel: Suha Al-Nasrallah
Reny K@m@l
Reny K@m@l
Published: 2017/01/21
Channel: receving sms
Google Earth KMZ
Google Earth KMZ
Published: 2013/06/10
Channel: LRDeltaPlastics
Maptitude 2017 Google KML, KMZ, MapPoint PTM, Shapefile Import
Maptitude 2017 Google KML, KMZ, MapPoint PTM, Shapefile Import
Published: 2017/03/28
Channel: Caliper Corporation Mapping Software
Thank you KML
Thank you KML
Published: 2013/02/28
Channel: Yb Spam
SprayView: Convert AgNav Spray Data to KMZ
SprayView: Convert AgNav Spray Data to KMZ
Published: 2017/06/05
Channel: AgNav
How to convert SHP to KML
How to convert SHP to KML
Published: 2017/05/24
Channel: MyGeodata Cloud
Google I/O 2011: High Performance KML for Maps and Earth
Google I/O 2011: High Performance KML for Maps and Earth
Published: 2011/05/12
Channel: Google Developers
How to add KML data to Google Earth chrome
How to add KML data to Google Earth chrome
Published: 2017/05/01
Channel: Géo Tech
Mundi KML Export
Mundi KML Export
Published: 2013/10/04
Channel: GEISINFO
ForeFlight Feature Focus: User Map Shapes
ForeFlight Feature Focus: User Map Shapes
Published: 2017/04/10
Channel: ForeFlight
Shapefile to KML with Shape2Earth
Shapefile to KML with Shape2Earth
Published: 2012/04/16
Channel: Tim Beermann
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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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