空间信息共享与互操作技术PPT教案.pptx

会计学
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空间信息共享与互操作技术
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WMS查询实例
-bin/NWGISS/NWGISS?
WMTVER=&REQUEST=map&
BBOX=-%%2C
%&
WIDTH=271&HEIGHT=406&SRS=EPSG%3A4326&
LAYERS=mod2%3ASWATH%3A
MODIS_SWATH_Type_L1B%3A
Height%3A0&
STYLES=Histogram+equalization%3ARainbow256&
FORMAT=GIF&BGCOLOR=0xFFFFFF&
TRANSPARENT=TRUE&EXCEPTIONS=XML
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<?xml version="" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE WMT_MS_Capabilities SYSTEM
""
[
<!ENTITY % KnownFormats " GeoTIFF | HDFEOS | NITF | WMS_XML " >
<!ELEMENT HDFEOS EMPTY>
<!ELEMENT NITF EMPTY>
<!-- end of DOCTYPE declaration -->
]>
<WMT_MS_Capabilities version="" updateSequence="0">
<Service> <!-- Service Metadata for the service as a whole -->
<Name> <!-- The WMT-defined name for this type of service -->
GetCoverage
</Name>
<Title>NASA WMT2 Web Server </Title>
<Abstract> </Abstract>
<Keywords> </Keywords>
<OnlineResource> <!-- The URL of this service -->
:8080/cgi-bin/dib/wcshdfeos?
</OnlineResource>
<Fees> none </Fees>
<AccessConstraints> none </AccessConstraints>
</Service>
<Capability> <!-- Capability metadata -->
<!-- coverage and capabilties request are available -->
<Request>
<Coverage>
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实现技术
根据国际标准Web Map Service Interface 制订出基于Web的地图服务规范，用GeoStar, GeoSurf, SuperMap, MapGIS, Arc/Info, MapInfo 软件上实现．实现异构电子地图的网络共享集成以及Web 服务．
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6
(2)基于Web的地理覆盖的服务规范
在网络环境下查找地理覆盖数据（影像、DEM等）服务网站，发出请求，服务器将地理覆盖数据直接传送到客户端。
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Web Coverage Services (WCS) Interfaces
GetCapabilities
GetCoverage
DescribeCoverageType
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GetCoverage
Data Layer Name
Format (HDFEOS,NITF,GEOTIFF)
Spatial Reference System
Map Bounding Box
Other Information (Dimension subsetting,
Spatial Resampling)
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实现技术
根据国际标准Web Coverage Service Interface 制订出基于Web的要素服务规范，用GeoStar等软件实现．实现了地理覆盖层数据的网络共享与互操作以及Web 服务．