Web地图服务（WMS）阅读器参数

WMS Connection

关闭URL

The URL for the WMS server. A typical URL specifying a WMS server looks like

http://www.fmeserver.com/wms

HTTP Authentication

Use Network Authentication

This parameter is always visible in some formats, and visible in other formats only when the dataset is a URL.

关闭身份验证方法

Specify the authentication method to use when accessing a password-protected server.

  • Basic:(default) Basic access authentication is designed to allow a client to provide credentials to a server on the assumption that the connection between them is trusted and secure. Note that any credentials passed from client to server can be easily intercepted through an insecure connection.
  • 消化：Digest authentication is one of the agreed-upon methods a web server can use to negotiate credentials, such as username or password, with a user's web browser.
  • NTLM:挑战 - 响应协议，用于提供与早期Windows 2000操作系统的Windows版本的兼容性。
  • Web Connection:Web connections provide a convenient and secure way to store and reuse previously established connection parameters. SeeWeb Connection以下。
  • Single Sign-on:FME will use the credentials of the current user to authenticate the HTTP request. This authentication method currently works only on the Windows operating system.

Note：要使用代理服务器访问数据集，请使用FME选项中的网络工具。从工作台菜单中，选择Tools > FME Options > Network. For more information, see "Network Proxy" in the FME Workbench Help.

关闭Web Connection

使用Web Connections.

FME选项：Web连接

Constraints

关闭Layer List

完全指定了连接后，单击“浏览”按钮以选择导入的图层。系统从数据库编译表格时出现一个连接窗口。出现图层列表后，您可以选择一个或多个图层，然后单击“确定”以解雇窗口。图层名称将显示在读取器参数框中的图层列表字段中。

关闭Split Requests By Layer

When selected, instructs the WMS reader to split the selected layers into separate HTTP Get Requests. That is, if N layers are selected, then N separate HTTP GetMap requests are performed fetching N images.

地图选项

关闭Transparent Background

设置地图的后台透明度。选择此选项后，图像格式支持透明度（例如，PNG和GIF），地图服务器将发送透明背景的图像。

关闭地图宽度

Specifies the width in pixels for the image.

关闭Map Height

Specifies the height in pixels for the image.

关闭输出格式

Specifies the image output format as a MIME type. The output format must be one of the formats listed in the WMS capabilities document. The directive defaults to “image/png”.

关闭Map SRS

Specifies the desired coordinate system. The default value is “CRS:84” for WMS 1.3.0 and “EPSG:4326” for WMS 1.1.0 and 1.1.1.

关闭时间

时间价值or range for map data, expressed using any of the following syntaxes:

Syntax 意义
价值 A single value.
价值1,value2,value3,... 多个值列表。
min/max/resolution An interval defined by its lower and upper bounds and its resolution.
min1/max1/res1,min2/max2/res2,... A list of multiple intervals.
关闭Elevation

Elevation value or range for map data, expressed using any of the following syntaxes:

Syntax 意义
价值 A single value.
价值1,value2,value3,... 多个值列表。
min/max/resolution An interval defined by its lower and upper bounds and its resolution.
min1/max1/res1,min2/max2/res2,... A list of multiple intervals.

架构属性

关闭Additional Attributes to Expose

Use this parameter to exposeFormat Attributes在Workbench中创建工作空间：

  • In adynamic scenario, it means these attributes can be passed to the output dataset at runtime.
  • In a non-dynamic scenario, you can use this parameter to expose additional attributes on multiple feature types.

使用搜索信封

Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned.

If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.

关闭Clip to Search Envelope

When selected, this parameter removes any portions of imported features being read that are outside the Search Envelope.

The example below illustrates the results of the Search Envelope whenClip to Search Envelopeis not selected (set to No) and when it is selected (set to Yes).

  • No: Any features that cross the search envelope boundary will be read, including the portion that lies outside of the boundary.
  • Yes: Any features that cross the search envelope boundary will be clipped at the boundary, and only the portion that lies inside the boundary will be read. The underlying function for theClip to Search Envelope功能是一个十字路口;但是，当Clip to Search Envelope被选中时,剪切操作也是performe吗d in addition to the intersection.