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KML or KMZ Tutorial
KML or KMZ Tutorial
Published: 2013/04/15
Channel: ultari
Keyhole Markup Language
Keyhole Markup Language
Published: 2014/10/08
Channel: Audiopedia
KML Tutorial Part 1 Udemy Free Course
KML Tutorial Part 1 Udemy Free Course
Published: 2015/10/28
Channel: Nile Geospatial
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
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
Difference between KML & KMZ
Difference between KML & KMZ
Published: 2017/04/23
Channel: LearnEveryone
Keyhole Markup Language
Keyhole Markup Language
Published: 2016/01/08
Channel: WikiAudio
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
What In The World - Transforming KML for data integration
What In The World - Transforming KML for data integration
Published: 2013/10/17
Channel: Google Developers
XML: Google Earth & KML Files
XML: Google Earth & KML Files
Published: 2011/07/25
Channel: Educator.com
How to Edit Placemarks
How to Edit Placemarks
Published: 2012/06/22
Channel: Darshan Mm
Easy to Import Kml File from Google Earth into ArcGIS  as Shapefile
Easy to Import Kml File from Google Earth into ArcGIS as Shapefile
Published: 2016/05/10
Channel: Technology Forum
Editing KML:KMZ Files on the new Google Earth
Editing KML:KMZ Files on the new Google Earth
Published: 2017/12/28
Channel: Donnie Piercey
How To Get KML Files on Your iPhone
How To Get KML Files on Your iPhone
Published: 2012/12/07
Channel: Juggler Bill
Import Google Earth KML File to iPhone or Android
Import Google Earth KML File to iPhone or Android
Published: 2014/05/07
Channel: GPSFishingMaps
KMZ
KMZ
Published: 2017/11/20
Channel: LOST FILES
Create & Open KML/KMZ Files With Google Maps & Google Earth
Create & Open KML/KMZ Files With Google Maps & Google Earth
Published: 2013/07/01
Channel: Christos Samaras
New Google Earth App import KML KMZ files
New Google Earth App import KML KMZ files
Published: 2017/04/20
Channel: Mike Downes
KML gneration from field data
KML gneration from field data
Published: 2017/02/13
Channel: FarmerBrianTee
What Is A KML File?
What Is A KML File?
Published: 2017/07/19
Channel: hi sparky
convert DWG to KML/KMZ(English)
convert DWG to KML/KMZ(English)
Published: 2017/05/15
Channel: sadiqu zubair
Create KML Files For Your Custom Google Maps
Create KML Files For Your Custom Google Maps
Published: 2010/04/30
Channel: Eastern Geek
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
Using jedit to edit KML (es)
Using jedit to edit KML (es)
Published: 2008/04/09
Channel: Earth Outreach
Google Maps Import KMZ File
Google Maps Import KMZ File
Published: 2012/09/13
Channel: Clay Reisler
Google Earth KMZ
Google Earth KMZ
Published: 2013/06/10
Channel: LRDeltaPlastics
Shapefile to KML with Shape2Earth
Shapefile to KML with Shape2Earth
Published: 2012/04/16
Channel: Tim Beermann
ForeFlight Feature Focus: User Map Shapes
ForeFlight Feature Focus: User Map Shapes
Published: 2017/04/10
Channel: ForeFlight
Creating and saving path as KML file in Google Earth
Creating and saving path as KML file in Google Earth
Published: 2014/12/04
Channel: Russian Sphinx
SEO  Techniques for Local Businesses - KML File
SEO Techniques for Local Businesses - KML File
Published: 2014/07/06
Channel: Nithin Chandra SR
POWERFUL
POWERFUL
Published: 2017/12/13
Channel: kmlkmljkl
Some grinds
Some grinds
Published: 2017/10/09
Channel: KML Scootz
Kml
Kml
Published: 2016/08/02
Channel: Erin McDonald
maqsood cousins kml
maqsood cousins kml
Published: 2017/09/01
Channel: MAQSOOD AHMAD
RANGER analyzers tutorial: [28] GPS option (part 2)
RANGER analyzers tutorial: [28] GPS option (part 2)
Published: 2018/02/21
Channel: PROMAX Electronics
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
Blue KML
Blue KML
Published: 2013/08/31
Channel: Aqua Craze
kml to shape fileconversion
kml to shape fileconversion
Published: 2015/08/31
Channel: dayesh parmar
Creating and Editing KML with Google Earth, Part 1
Creating and Editing KML with Google Earth, Part 1
Published: 2008/10/16
Channel: 3DWorldWSC
maqsood cousins kml
maqsood cousins kml
Published: 2017/07/13
Channel: MAQSOOD AHMAD
Generate kml file from excel
Generate kml file from excel
Published: 2012/10/20
Channel: René Marcial Reyes Olivera
HOW TO CONVERT KML FILE INTO FMS FORMAT
HOW TO CONVERT KML FILE INTO FMS FORMAT
Published: 2017/12/07
Channel: Sambit KumarPattanaik
Viewing Tours in the new Google Earth
Viewing Tours in the new Google Earth
Published: 2017/12/20
Channel: Donnie Piercey
Agri Sense Create KML
Agri Sense Create KML
Published: 2017/05/02
Channel: Agri-Sense International
maqsood cousins kml
maqsood cousins kml
Published: 2017/07/10
Channel: MAQSOOD AHMAD
Shape2Earth Export Selected Features
Shape2Earth Export Selected Features
Published: 2012/04/16
Channel: Tim Beermann
# KML
# KML
Published: 2017/12/31
Channel: Dean Carey
Kml
Kml
Published: 2016/09/29
Channel: Kamal Sharma
Introduction KMZ
Introduction KMZ
Published: 2013/06/09
Channel: AyoubProduction974
Comment 4 Load kml
Comment 4 Load kml
Published: 2017/11/23
Channel: TheMoraLab
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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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