2.7. WFS-要素 Web 服务¶
2.7.1. 概述¶
WFS(OpenGIS® Web Feature Service)当前版本是 1.1.0。 WFS 标准定义了一些操作,这些操作允许用户在分布式的环境下通过 HTTP对空间数据进行查询、编辑等操作。
WFS 服务要求服务的接口必须由 XML 描述,另外数据交互必须由 GML 进行,数据过滤采用CQl [18] 语言。
2.7.2. 种类与操作¶
当一个客户端想要访问 WFS 服务时,一般会涉及到以下的流程:
通过操作获取 WFS 服务支持的操作和要素类(Feature Type,可以理解为 WFS 中的数据集)。
(可能)通过操作获取 WFS 服务支持的要素类的定义。
客户端发送某个操作的请求。
WFS 服务处理请求。
WFS 服务返回处理的结果和状态。
上面几个步骤中所提到的“操作”包括:
GetCapabilities(获取服务中的要素类及支持的操作)
DescribeFeatureType(描述要素类的信息)
GetFeature(获取要素)
GetGmlObject(通过 XLink 获取 GML 对象)
Transaction(创建、更新、删除数据的事务操作)
LockFeature(在事务过程中锁定要素)
但是,这些操作并不是必须全部实现,而是实现全部或部分。根据所支持的操作不同,WFS 可以分为 3 类:
1. Basic WFS(就是最常被提及的 WFS,必须支持 GetCapabilities/ DescribeFeatureType GetFeature 操作,在功能上意味着提供一个叧读的数据服务)
XLink WFS(必须在 Basic WFS 基础上加上 GetGmlObject 操作)
3. Transaction WFS(也有称为 WFS-T,必须在 Basic WFS 基础上加上 Transaction 操作以支持编辑数据,另外也可以加上 GetGmlObject/LockFeature 操作)关于服务涉及的基本元素,可以参考前面的章节:《服务涉及的基本元素》。
注意,在后面的内容中,服务的操作叧介绍 Basic WFS 和 Transaction WFS 中需要实现的操作,也就是说 GetCapabilities、DescribeFeatureType、 GetFeature 和 Transaction 操作。
2.7.3. GetCapabilities 操作¶
1. KVP 格式请求¶
GetCapabilities 操作需要以下的参数:
参数 |
是否必须 |
默认值 |
SERVICE |
是 |
WFS |
REQUEST=GetCapabilities |
是 |
以下是一个 WFS 使用 KVP 格式的 GetCapabilities 操作示例:
http://www.someserver.com/wfs?
SERVICE=WFS&
REQUEST=GetCapabilities
2. XML 格式请求¶
以下是一个 WFS 使用 XML 格式的 GetCapabilities 操作示例:
<?xml version="1.0" ?>
<GetCapabilities service="WFS" xmlns="http://www.opengis.net/wfs"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd" />
3. 响应示例¶
以下是一个 WFS 的 GetCapabilities 操作的响应示例:
<?xml version="1.0" encoding="UTF-8"?>
<wfs:WFS_Capabilites xmlns:ows="http://www.opengis.net/ows"
xmlns:ogc="http://www.opengis.net/ogc" xmlns:wfs="http://www.opengis.net/wfs"
xmlns:gml="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/wfs ../wfs.xsd" version="1.1.0"
updateSequence="0">
<ows:ServiceIdentification>
<ows:ServiceType>WFSows:ServiceType>
<ows:ServiceTypeVersion>1.1.0ows:ServiceTypeVersion>
<ows:Title>OGC Member WFSows:Title>
...
ows:ServiceIdentification>
<ows:ServiceProvider>
<ows:ProviderName>BlueOxows:ProviderName>
<ows:ServiceContact>
...
ows:ServiceContact>
ows:ServiceProvider>
<ows:OperationsMetadata>
<ows:Operation name="GetCapabilities">
...
ows:Operation>
<ows:Operation name="DescribeFeatureType">
...
ows:Operation>
<ows:Operation name="GetFeature">
...
ows:Operation>
<ows:Operation name="GetFeatureWithLock">
...
ows:Operation>
<ows:Operation name="GetGMLObject">
...
ows:Operation>
<ows:Operation name="LockFeature">
...
ows:Operation>
<ows:Operation name="Transaction">
...
ows:Operation>
<ows:Parameter name="srsName">
<ows:Value>EPSG:4326ows:Value>
ows:Parameter>
<ows:Constraint name="DefaultMaxFeatures">
<ows:Value>10000ows:Value>
ows:Constraint>
...
ows:OperationsMetadata>
<wfs:FeatureTypeList>
<wfs:FeatureType xmlns:bo="http://www.BlueOx.org/BlueOx">
<wfs:DefaultSRS>EPSG:62696405wfs:DefaultSRS>
<wfs:OutputFormats>
<wfs:Format>text/xml; subtype=gml/3.1.1wfs:Format>
wfs:OutputFormats>
<ows:WGS84BoundingBox>
<ows:LowerCorner>-180 -90ows:LowerCorner>
<ows:UpperCorner>180 90ows:UpperCorner>
ows:WGS84BoundingBox>
...
wfs:FeatureType>
wfs:FeatureTypeList>
<wfs:ServesGMLObjectTypeList>
<wfs:GMLObjectType xmlns:bo="http://www.BlueOx.org/BlueOx">
<wfs:Name>bo:OxTypewfs:Name>
<wfs:Title>Babe's Lineagewfs:Title>
<wfs:OutputFormats>
<wfs:Format>text/xml; subtype=gml/3.1.1wfs:Format>
<wfs:Format>text/xhmtlwfs:Format>
wfs:OutputFormats>
wfs:GMLObjectType>
wfs:ServesGMLObjectTypeList>
<wfs:SupportsGMLObjectTypeList>
<wfs:GMLObjectType>
<wfs:Name>gml:PointTypewfs:Name>
<wfs:OutputFormats>
<wfs:Format>text/xml; subtype=gml/3.1.1wfs:Format>
<wfs:Format>text/xhtmlwfs:Format>
wfs:OutputFormats>
wfs:GMLObjectType>
...
wfs:SupportsGMLObjectTypeList>
<ogc:Filter_Capabilities>
<ogc:Spatial_Capabilities>
<ogc:GeometryOperands>
<ogc:GeometryOperand>gml:Envelopeogc:GeometryOperand>
<ogc:GeometryOperand>gml:Pointogc:GeometryOperand>
<ogc:GeometryOperand>gml:LineStringogc:GeometryOperand>
<ogc:GeometryOperand>gml:Polygonogc:GeometryOperand>
...
ogc:GeometryOperands>
<ogc:SpatialOperators>
<ogc:SpatialOperator name="BBOX" />
<ogc:SpatialOperator name="Equals" />
<ogc:SpatialOperator name="Disjoint" />
<ogc:SpatialOperator name="Intersects" />
<ogc:SpatialOperator name="Touches" />
<ogc:SpatialOperator name="Crosses" />
<ogc:SpatialOperator name="Within" />
<ogc:SpatialOperator name="Contains" />
<ogc:SpatialOperator name="Overlaps" />
<ogc:SpatialOperator name="Beyond" />
ogc:SpatialOperators>
ogc:Spatial_Capabilities>
<ogc:Scalar_Capabilities>
<ogc:LogicalOperators />
<ogc:ComparisonOperators>
<ogc:ComparisonOperator>LessThanogc:ComparisonOperator>
<ogc:ComparisonOperator>GreaterThanogc:ComparisonOperator>
<ogc:ComparisonOperator>LessThanEqualToogc:ComparisonOperator>
<ogc:ComparisonOperator>GreaterThanEqualToogc:ComparisonOperator>
<ogc:ComparisonOperator>EqualToogc:ComparisonOperator>
<ogc:ComparisonOperator>NotEqualToogc:ComparisonOperator>
<ogc:ComparisonOperator>Likeogc:ComparisonOperator>
<ogc:ComparisonOperator>Betweenogc:ComparisonOperator>
<ogc:ComparisonOperator>NullCheckogc:ComparisonOperator>
ogc:ComparisonOperators>
<ogc:ArithmeticOperators>
<ogc:SimpleArithmetic />
<ogc:Functions>
<ogc:FunctionNames>
<ogc:FunctionName nArgs="1">MINogc:FunctionName>
<ogc:FunctionName nArgs="1">MAXogc:FunctionName>
<ogc:FunctionName nArgs="1">SINogc:FunctionName>
<ogc:FunctionName nArgs="1">COSogc:FunctionName>
<ogc:FunctionName nArgs="1">TANogc:FunctionName>
ogc:FunctionNames>
ogc:Functions>
ogc:ArithmeticOperators>
ogc:Scalar_Capabilities>
<ogc:Id_Capabilities>
<ogc:EID />
<ogc:FID />
ogc:Id_Capabilities>
ogc:Filter_Capabilities>
wfs:WFS_Capabilites>
2.7.4. DescribeFeatureType 操作¶
1. KVP 格式请求¶
DescribeFeatureType 操作需要以下的参数:
参数 |
是否必须 |
默认值 |
VERSION |
是 |
1.1.0 |
SERVICE |
是 |
WFS |
REQUEST=DescribeFeatureType |
是 |
|
TYPENAME |
||
OUTPUTFORMAT |
text/xml; subtype=gml/3.1.1 |
以下是一个 WFS 使用 KVP 格式的 DescribeFeatureType 操作示例:
http://www.someserver.com/wfs?
SERVICE=WFS&
VERSION=1.1.0&
REQUEST=DescribeFeatureType&
TYPENAME=TreesA_1M,BuiltUpA_1M
2. XML 格式请求¶
以下是一个 WFS 使用 XML 格式的 DescribeFeatureType 操作示例:
<xml version="1.0" ?>
<DescribeFeatureType
version
="1.1.0"
service
="WFS"
outputFormat
="text/xml; subtype=gml/3.1.1"
xmlns
="http://www.opengis.net/wfs"
xmlns
:myns
="http://www.myserver.com/myns"
xmlns
:xsi
="http://www.w3.org/2001/XMLSchema-instance"
xsi
:schemaLocation
="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd"
>
<
TypeName
>
myns:PersonTypeName
>
DescribeFeatureType
>
3. 响应示例¶
以下是一个 WFS 的 DescribeFeatureType 操作的响应示例:
xml version="1.0" ?>
<
wfs
:FeatureCollection
xmlns
="http://www.someserver.com/myns"
xmlns
:myns
="http://www.someserver.com/myns"
xmlns
:wfs
="http://www.opengis.net/wfs"
xmlns
:gml
="http://www.opengis.net/gml"
xmlns
:xsi
="http://www.w3.org/2001/XMLSchema-instance"
xsi
:schemaLocation
="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd
http://www.someserver.com/myns ex10.xsd">
<gml :boundedBy>
<gml :Envelope >
<gml :coord >
<gml :X >
10gml
:X >
<gml :Y >
10gml :Y >
gml
:coord
>
<
gml
:coord
>
<
gml
:X
>
20gml
:X
>
<
gml
:Y
>
20gml
:Y
>
gml
:coord
>
gml
:Envelope
>
gml
:boundedBy
>
<
gml
:featureMember
>
<
Person
>
<
myns
:lastName
>
Smithmyns
:lastName
>
<
myns
:firstName
>
Fredmyns
:firstName
>
<
myns
:age
>
35myns
:age
>
<
myns
:sex
>
Malemyns
:sex
>
<
myns
:location
>
<
gml
:Point
>
<
gml
:pos
>
15 15gml
:pos
>
gml
:Point
>
myns
:location
>
<
myns
:mailAddress
>
<
myns
:Address
>
<
myns
:streetName
>
Main St.myns
:streetName
>
<
myns
:streetNumber
>
5myns
:streetNumber
>
<
myns
:city
>
SomeCitymyns
:city
>
<
myns
:province
>
Someprovincemyns
:province
>
<
myns
:postalCode
>
X1X 1X1myns
:postalCode
>
<
myns
:country
>
Canadamyns
:country
>
<
myns
:Address
>
myns
:mailAddress
>
Person
>
gml
:featureMember
>
wfs
:FeatureCollection
>
2.7.5. GetFeature 操作¶
1. KVP 格式请求¶
GetFeature 操作需要以下的参数:
参数 |
是否必须 |
默认值 |
VERSION |
是 |
1.1.0 |
SERVICE |
是 |
WFS |
REQUEST=GetFeature |
是 |
|
TYPENAME |
是 |
|
OUTPUTFORMAT |
text/xml; subtype=gml/3.1.1 |
|
BBOX |
||
FILTER |
||
SORTBY |
||
MAXFEATURES |
||
PROPERTYNAME |
||
SRSNAME |
||
FEATUREID |
||
EXPIRY |
||
RESULTTYPE |
results |
|
FEATUREVERSION |
以下是一个WFS使用KVP格式的GetFeature操作示例:
http://www.someserver.com/wfs?
SERVICE=WFS&
VERSION=1.1.0&
REQUEST=GetFeature&
PROPERTYNAME=InWaterA_1M/wkbGeom,InWaterA_1M/tileId&
TYPENAME=InWaterA_1M&
FILTER=InWaterA_1M/wkbGeom
10,10
20 20
2.XML格式请求¶
以下是一个WFS使用XML格式的GetFeature操作示例:
xml version="1.0" ?>
<
DescribeFeatureType
version
="1.1.0"
service
="WFS"
outputFormat
="text/xml; subtype=gml/3.1.1"
xmlns
="http://www.opengis.net/wfs"
xmlns
:myns
="http://www.myserver.com/myns"
xmlns
:xsi
="http://www.w3.org/2001/XMLSchema-instance"
xsi
:schemaLocation
="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd"
>
<
TypeName
>
myns:PersonTypeName
>
DescribeFeatureType
>
3.响应示例¶
以下是一个WFS的GetFeature操作的响应示例:
xml version="1.0" ?>
<
wfs
:FeatureCollection
xmlns
="http://www.someserver.com/myns"
xmlns
:myns
="http://www.someserver.com/myns"
xmlns
:wfs
="http://www.opengis.net/wfs"
xmlns
:gml
="http://www.opengis.net/gml"
xmlns
:xsi
="http://www.w3.org/2001/XMLSchema-instance"
xsi
:schemaLocation
="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd
http://www.someserver.com/myns ex10.xsd"
>
<
gml
:boundedBy
>
<
gml
:Envelope
>
<
gml
:coord
>
<
gml
:X
>
10gml
:X
>
<
gml
:Y
>
10gml
:Y
>
gml
:coord
>
<
gml
:coord
>
<
gml
:X
>
20gml
:X
>
<
gml
:Y
>
20gml
:Y
>
gml
:coord
>
gml
:Envelope
>
gml
:boundedBy
>
<
gml
:featureMember
>
<
Person
>
<
myns
:lastName
>
Smithmyns
:lastName
>
<
myns
:firstName
>
Fredmyns
:firstName
>
<
myns
:age
>
35myns
:age
>
<
myns
:sex
>
Malemyns
:sex
>
<
myns
:location
>
<
gml
:Point
>
<
gml
:pos
>
15 15gml
:pos
>
gml
:Point
>
myns
:location
>
<
myns
:mailAddress
>
<
myns
:Address
>
<
myns
:streetName
>
Main St.myns
:streetName
>
<
myns
:streetNumber
>
5myns
:streetNumber
>
<
myns
:city
>
SomeCitymyns
:city
>
<
myns
:province
>
Someprovincemyns
:province
>
<
myns
:postalCode
>
X1X 1X1myns
:postalCode
>
<
myns
:country
>
Canadamyns
:country
>
<
myns
:Address
>
myns
:mailAddress
>
Person
>
gml
:featureMember
>
wfs
:FeatureCollection
>
2.7.6. Transaction 操作¶
1. KVP 格式请求¶
Transaction 操作使用 KVP 格式请求目前叧支持 Delete(Insert 和 Update 必须通过 XML 格式请求发送)。Transaction 操作需要以下的参数:
参数 |
是否必须 |
默认值 |
VERSION |
是 |
1.1.0 |
SERVICE |
是 |
WFS |
REQUEST=Transaction |
是 |
|
OPERATION=Delete |
是 |
|
TYPENAME |
是 |
|
RELEASEACTION |
||
FILTER |
||
BBOX |
||
FEATUREID |
以下是一个WFS使用KVP格式的Transaction操作示例:
http://www.someserver.com/wfs?
SERVICE=WFS&
VERSION=1.1.0&
REQUEST=Transaction&
OPERATION=Delete&
TYPENAME=InWaterA_1M,BuiltUpA_1M&
FILTER=(<Filter><Within><PropertyName>InWaterA_1M/wkbGeom<PropertyName>
<gml:Envelope>
<gml:lowerCorner>10 10</gml:lowerCorner>
<gml:upperCorner>20 20</gml:upperCorner></gml:Envelope></Within>
</Filter>)(< Filter><Within><PropertyName>BuiltUpA_1M/wkbGeom
<PropertyName><gml:Envelope><gml:lowerCorner>10 10</gml:lowerCorner>
<gml:upperCorner>20,20</gml:upperCorner>
</gml:Envelope></Within></Filter>)
2.XML格式请求¶
以下是一个WFS使用XML格式的Transaction操作示例:
<?xml version="1.0" ?>
<wfs:Transaction version="1.1.0" service="WFS"
handle="Transaction 01" xmlns="http://www.someserver.com/myns"
xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogc="http://www.opengis.net/ogc"
xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.someserver.com/myns
http://www.someserver.com/wfs/cwwfs.cgi?
request=DESCRIBEFEATURETYPE&
typename=ELEVP_1M,RoadL_1M,BuiltUpA_1M
http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd">
<!--
Create a new instance of feature type RoadL_1M which has complex
properties segment and roadType.
-->
<wfs:Insert handle="ComplexInsert">
<RoadL_1M>
<name>Highway 401</name>
<segement>
<designation>SEG_A41</designation>
<geometry>
<gml:LineString gid="e3"
srsName="http://www.opengis.net/gml/srs/epsg.xml#63266405">
<gml:posList>...</gml:posList>
</gml:LineString>
</geometry>
</segment>
<roadType>
<surfaceType>Asphalt</surfaceType>
<nLanes>12</nLanes>
<grade>15</grade>
</roadType>
</RoadL_1M>
</wfs:Insert>
<!--
Update the designation of a particular range of segments which are now
being collapsed into a single segment. The The filter uses an XPath
expression to reference the designation property
-->
<wfs:Update typeName="RoadL_1M">
<wfs:Property>
<wfs:Name>RoadL_1M/segment/designation</wfs:Name>
<wfs:Value>SEG_A60</wfs:Value>
</wfs:Property>
<ogc:Filter>
<ogc:PropertyIsBetween>
<ogc:PropertyName>RoadL_1M/segment/designation</ogc:PropertyName>
<ogc:LowerBoundary>
<ogc:Literal>SEG_A60</ogc:Literal>
</ogc:LowerBoundary>
<ogc:UpperBoundary>
<ogc:Literal>SEG_A69</ogc:Literal>
</ogc:UpperBoundary>
</ogc:PropertyIsBetween>
</ogc:Filter>
</wfs:Update>
<!-- Delete the feature instance BuiltUpA_1M.1013. -->
<wfs:Delete typeName="BuiltUpA_1M">
<ogc:Filter>
<ogc:GmlObjectId gml:id="BuiltUpA_1M.1013" />
</ogc:Filter>
</wfs:Delete>
</wfs:Transaction>
3.响应示例¶
以下是一个WFS的Transaction操作的响应示例:
<?xml version="1.0" ?>
<wfs:TransactionResponse version="1.1.0"
xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogc="http://www.opengis.net/ogc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/wfs ../wfs/1.1.0/WFS.xsd">
<wfs:TransactionSummary>
<wfs:totalInserted>1</wfs:totalInserted>
<wfs:totalUpdated>1</wfs:totalUpdated>
<wfs:totalDeleted>1</wfs:totalDeleted>
</wfs:TransactionSummary>
<wfs:InsertResults>
<wfs:Feature handle="ComplexInsert">
<ogc:FeatureId fid="RoadL_1M.1553" />
</wfs:Feature>
<wfs:Feature handle="Statement 2">
<ogc:FeatureId fid="RoadL_1M.509876" />
</wfs:Feature>
<wfs:Feature handle="Statement 2">
<ogc:FeatureId fid="BuiltUpA_1M.509877" />
</wfs:Feature>
</wfs:InsertResults>
</wfs:TransactionResponse>
2.7.7. ArcGISServer对WFS的支持¶
ArcGISServer10中支持的WFS版本为最新的1.1.0。 在ArcGISServer 中,叧需简单地勾选的Capabilities选项卡中可以选择支持WFS, 如图 19。 如果勾选了Transaction复选框,那么通过该 WFS 还可以进行数据更新(注意,需要是SDE数据源)。
图19 ArcGISServer发布WFS服务
现在我们在浏览器中执行一个GetFeature操作,查询名为“Beijing”的对象:
http://localhost:8399/arcgis/services/test/wfsTest/MapServer/WFSServer?
request=getfeature&
typename=test_wfsTest:sde_cities&
filter=(
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>CITY_NAME</ogc:PropertyName>
<ogc:Literal>Beijing</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
)
这个操作返回如下的结果:
<wfs:FeatureCollection
xsi:schemaLocation='http://localhost:8399/arcgis/services/test/wfsTest/MapServer/WFSServer http://localhost:8399/arcgis/services/test/wfsTest/MapServer/WFSServer?request=DescribeFeatureType%26version=1.1.0%26typename=sde_cities http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd'
xmlns:test_wfsTest='http://localhost:8399/arcgis/services/test/wfsTest/MapServer/WFSServer'
xmlns:gml='http://www.opengis.net/gml' xmlns:wfs='http://www.opengis.net/wfs'
xmlns:xlink='http://www.w3.org/1999/xlink' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
<gml:boundedBy>
<gml:Envelope srsName='urn:ogc:def:crs:EPSG:6.9:4326'>
<gml:lowerCorner>-86.002616990000007
-176.15156363599999</gml:lowerCorner>
<gml:upperCorner>102.93161888100001
179.22188769499999</gml:upperCorner>
</gml:Envelope>
</gml:boundedBy>
<gml:featureMember>
<test_wfsTest:sde_cities gml:id='F3__474'>
<test_wfsTest:OBJECTID>474</test_wfsTest:OBJECTID>
<test_wfsTest:CITY_NAME>Beijing</test_wfsTest:CITY_NAME>
<test_wfsTest:GMI_ADMIN>CHN-BJN</test_wfsTest:GMI_ADMIN>
<test_wfsTest:ADMIN_NAME>Beijing</test_wfsTest:ADMIN_NAME>
<test_wfsTest:FIPS_CNTRY>CH</test_wfsTest:FIPS_CNTRY>
<test_wfsTest:CNTRY_NAME>China</test_wfsTest:CNTRY_NAME>
<test_wfsTest:STATUS>National and provincial capital</test_wfsTest:STATUS>
<test_wfsTest:POP_RANK>1</test_wfsTest:POP_RANK>
<test_wfsTest:POP_CLASS>5,000,000 and greater</test_wfsTest:POP_CLASS>
<test_wfsTest:PORT_ID>0</test_wfsTest:PORT_ID>
<test_wfsTest:LABEL_FLAG>1</test_wfsTest:LABEL_FLAG>
<test_wfsTest:NEAR_FID>40</test_wfsTest:NEAR_FID>
<test_wfsTest:NEAR_DIST>185.74736243999999</test_wfsTest:NEAR_DIST>
<test_wfsTest:Shape>
<gml:Point>
<gml:pos>39.906189088000019 116.38803663600004</gml:pos>
</gml:Point>
</test_wfsTest:Shape>
</test_wfsTest:sde_cities>
</gml:featureMember>
</wfs:FeatureCollection>
接着,我想删掉这个对象,就要使用 Transaction 操作。在 ArcGISServer 中,执行删除之前还需要 lockId 属性, 因此还需要通过 GetFeatureWithLock 操作获取一个锁:
http://localhost:8399/arcgis/services/test/wfsTest/MapServer/WFSServer?
request=getfeaturewithlock&
typename=test_wfsTest:sde_cities&
filter=(
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>CITY_NAME</ogc:PropertyName>
<ogc:Literal>Beijing</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
)
这个操作返回lockId值为”{CEBC222E-00AD-49F5-A0E9-9F4CB98EE07E}”,接下来,我们通过一个POST请求对这个对象进行删除,请求体内容如下:
<wfs:Transaction version="1.1.0" service="WFS"
xmlns="http://www.someserver.com/myns"
xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogc="http://www.opengis.net/ogc"
xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<wfs:LockId>{CEBC222E-00AD-49F5-A0E9-9F4CB98EE07E}</wfs:LockId>
<wfs:Delete typeName="test_wfsTest:sde_cities">
<ogc:Filter>
<ogc:GmlObjectId gml:id="F3__474" />
</ogc:Filter>
</wfs:Delete>
</wfs:Transaction>
删除成功后将会返回如下的结果:
<wfs:TransactionResponse version='1.1.0'
xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:gml='http://www.opengis.net/gml'
xmlns:ogc='http://www.opengis.net/ogc' xmlns:wfs='http://www.opengis.net/wfs'>
<wfs:TransactionSummary>
<wfs:totalDeleted>1</wfs:totalDeleted>
</wfs:TransactionSummary>
</wfs:TransactionResponse>
我们也可以在其它的客户端中直接加载这个WFS服务,比如使用uDig:
图20uDig中加载ArcGISServer发布的WFS服务