TARGETLAYER

Used in

Servers

Image Query Feature

Parent elements

Syntax

<TARGETLAYER	Attribute Description Table
When parent element is GET_FEATURES (Image Service using a dynamic layer): *(r)id="string"* (r)type="featureclass" When parent element is GET_IMAGE, GET_EXTRACT, GET_FEATURES (referencing an existing layer): *(r)id="string"* > <DATASET... /> [Image Services only] </TARGETLAYER >
(r): Attribute or child element is required.

Description

Defines a target layer for selecting features based on a buffer in the same or different layer in the ArcIMS service.

Restrictions

DATASET is a valid child element with Image Services only.
Known limit. When using the BUFFER project attribute, and TARGETLAYER is used, FEATURECOORDSYS and FILTERCOORDSYS must be explicitly defined inside TARGETLAYER even if they are included in the map configuration file. Otherwise, the buffer will not project as expected.

Attribute Descriptions for TARGETLAYER

When parent element is GET_FEATURES (Image Service using a dynamic layer):

Attribute	Usage
id	Unique ID for a layer. The ID can be any combination of alpha and numeric characters but cannot duplicate any other layer IDs.
type	Specifies layer type. The only valid value is "featureclass".

When parent element is GET_IMAGE, GET_EXTRACT, GET_FEATURES (referencing an existing layer):

Attribute	Usage
id	References a previously defined layer ID from the ArcIMS service or request.

Examples for TARGETLAYER

Example 1: When in a GET_FEATURES request.

<?xml version="1.0" encoding="UTF-8" ?>
<ARCXML version="1.1">
  <REQUEST>
    <GET_FEATURES featurelimit="25" beginrecord="0" outputmode="xml" geometry="false" envelope="true" compact="true">
      <LAYER id="2" /> 
      <SPATIALQUERY subfields="#SHAPE# NAME">
        <BUFFER distance="1" >
          <TARGETLAYER id="4" /> 
          <SPATIALQUERY subfields="NAME" />
        </BUFFER>
        <SPATIALFILTER relation="area_intersection" >
          <ENVELOPE minx="-16154208.3772906" miny="-4165319.9729724" maxx="-4904885.23874079" maxy="4271672.38093997" />
        </SPATIALFILTER>
      </SPATIALQUERY>
    </GET_FEATURES>
  </REQUEST>
</ARCXML>

Example 2: When in a GET_IMAGE request. Note in this example that the DATASET fromlayer is "CITIES". This refers to the LAYER id in the map configuration file, not the LAYER name.

<?xml version="1.0" encoding="UTF-8"?>
<ARCXML version="1.1">
  <REQUEST>
    <GET_IMAGE>
      <PROPERTIES>
        <ENVELOPE minx="867805.08306143" miny="6771243.45626185" maxx="1576642.8482793" maxy="7302871.78017525"/>
      </PROPERTIES>
      <LAYER type="featureclass" name="theBufferTarget" visible="true" id="buffertarget">
        <DATASET fromlayer="CITIES"/>
        <SPATIALQUERY>
          <BUFFER distance="100" bufferunits="miles">
            <TARGETLAYER id="CITIES"/>
          </BUFFER>
          <SPATIALFILTER relation="area_intersection">
            <ENVELOPE minx="867805.08306143" miny="6771243.45626185" maxx="1576642.8482793" maxy="7302871.78017525"/>
          </SPATIALFILTER>
        </SPATIALQUERY>
        <SIMPLERENDERER>
          <SIMPLEMARKERSYMBOL color="255,0,0" />
        </SIMPLERENDERER>
      </LAYER>
      <LAYER type="featureclass" name="theBuffer" visible="true" id="buffer">
        <DATASET fromlayer="CITIES"/>
        <SPATIALQUERY>
          <BUFFER distance="100" bufferunits="miles" />
          <SPATIALFILTER relation="area_intersection">
            <ENVELOPE minx="867805.08306143" miny="6771243.45626185" maxx="1576642.8482793" maxy="7302871.78017525"/>
          </SPATIALFILTER>
        </SPATIALQUERY>
        <SIMPLERENDERER>
          <SIMPLEPOLYGONSYMBOL fillcolor="100,100,100" filltype="solid" filltransparency="0.5" />
        </SIMPLERENDERER>
      </LAYER>
    </GET_IMAGE>
  </REQUEST>
</ARCXML>

Example 3: When DATASET is used as a child element of a dynamic target layer. (Valid with Image Services only)

<?xml version="1.0" encoding="UTF-8" ?>
<ARCXML version="1.1">
  <REQUEST>
    <GET_FEATURES featurelimit="25" beginrecord="1" outputmode="xml" geometry="false" envelope="false" checkesc="true">
      <LAYER type="featureclass" id="40">
      <DATASET name="CITIES" type="point" workspace="shp_ws-2" />
      </LAYER>
      <SPATIALQUERY>
        <BUFFER distance="800" bufferunits="miles">
          <TARGETLAYER id="41" type="featureclass" >
            <DATASET name="country" type="polygon" workspace="shp_ws-0" />
          </TARGETLAYER>
        </BUFFER>
      </SPATIALQUERY>
    </GET_FEATURES>
  </REQUEST>
</ARCXML>