web map service การใช้

• There have been 3 generations of web map service.
• The software is used to display, overlay, edit and manage distributed Web Map Services.
• The Service continues to point large data users to the Web Map Service ( WMS ) capability.
• However, they are mainly accessed via MapServer's implementation of the Open Geospatial Consortium's Web Map Service standard.
• Web map services are based on the concept of the image map whereby this defines the area overlaying an image ( e . g.
• Google Earth is able to show various kinds of images overlaid on the surface of the earth and is also a Web Map Service client.
• ArcGIS Explorer is a GIS viewer which can work as a client for ArcGIS Server, ArcIMS, ArcWeb Services and Web Map Service ( WMS ).
• It also works well with OpenGIS Consortium standards for Web Map Services WMS and Web Map Context Documents ( WMC ) through MapServer's support for these standards.
• TMS is most widely supported by web mapping clients and servers; although there is some desktop support, the Web Map Service protocol is more widespread for enterprise mapping applications.
• GeoServer functions as the reference implementation of the Open Geospatial Consortium Web Feature Service standard, and also implements the Web Map Service, Web Coverage Service and Web Processing Service specifications.
• The "'Conservation Geoportal "'was an online geoportal, intended to provide a comprehensive listing of geographic information systems ( GIS ) datasets and web map service relevant to biodiversity conservation.
• The TMS protocol fills a gap between the very simple standard used by OpenStreetMap and the complexity of the Web Map Service standard, providing simple urls to tiles while also supporting alternate spatial referencing system.
• OpenLayers supports GeoRSS, KML ( Keyhole Markup Language ), Geography Markup Language ( GML ), GeoJSON and map data from any source using OGC-standards as Web Map Service ( WMS ) or Web Feature Service ( WFS ).
• "' Centamap "'(-N烻0WW ) is a free web map service that displays maps of Hong Kong, launched in 1999 . It obtains licensed map data from the Survey and Mapping Office of the Hong Kong Government.
• OsgEarth uses a . earth XML map description to configure both web map services and local data sources . osgEarth developers are able to use ReadyMap . org free data services that hosts a 15m global basemap derived from the GLCF Landsat imagery, 90M SRTM elevation dataset derived from CGIAR SRTM, and world-wide street vector overlay from OpenStreetMap.
• According to INSPIRE principles, this application has been created and extended so that it is possible to combine layers of maps located in different map servers all around the World, based on International Web Map Service ( WMS ) standards and specifications from the Open GIS Consortium, as also laid down in the INSPIRE Guidelines, in order to attain the maximum interoperability of data and services.
• Unlike OGC Web Map Service ( WMS ), which portrays spatial data to return static maps ( rendered as pictures by the server ), the Web Coverage Service provides available data together with their detailed descriptions; defines a rich syntax for requests against these data; and returns data with its original semantics ( instead of pictures ) which may be interpreted, extrapolated, etc ., and not just portrayed.
• Both ArcGIS Server Standard and Advanced editions support the following types of Web services : Feature ( for Web editing ), Geodata ( for geodatabase replication ), Geocode ( for finding and displaying addresses / locations on a map ), Geometry ( for geometric calculations such as calculating areas and lengths ), Geoprocessing ( for scientific modeling and spatial data analysis ), Globe ( for 3D and globe rendering ), Image ( for serving raster data and providing control over imagery delivery, such as satellite imagery or orthophotos ), Keyhole Markup Language ( KML ), Map ( for cached and optimized map services ), Mobile ( for running services on field devices ), Network Analyst ( for routing, closest facility location, or service area analysis ), Search ( for enterprise search of GIS assets ), Web Coverage Service ( WCS ), Web Feature Service ( WFS ) and Transactional Web Feature Service ( WFS-T ), and Web Map Service ( WMS ).