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ArcIMS - GET_FEATURES

Posted In: ArcIMS , GIS . By 卡西卡

GET_FEATURES 只能對Query, Feature, ArcMap 這3種Server送出。
送出的Request編碼要設為big5才不會有中文亂碼。不能用UTF-8。

送出

LAYER：指定要查那一層
SPATIALQUERY：查詢條件
- subfields：回傳的欄位，用空格分隔（如：ST_CODE ST_NAME）
  #ALL#, #SHAPE#
- where：條件。<>符號要先編碼

回傳

<?xml version="1.0" encoding="big5"?>
<ARCXML version="1.1">
<RESPONSE>
<FEATURES>
<FEATURE>
<FIELDS>
<FIELD name="ID" value="2" />
<FIELD name="STCODE" value="466900" />
<FIELD name="STNAME" value="淡水" />
<FIELD name="LONG" value="121.44" />
<FIELD name="LAT" value="25.1655555555556" />
<FIELD name="STX" value="293512.984729649" />
<FIELD name="STY" value="2784394.69179442" />
<FIELD name="#SHAPE#" value="[Geometry]" />
<FIELD name="#ID#" value="2" />
</FIELDS>
<MULTIPOINT>
<POINT x="293512.984729649" y="2784394.69179442"/>
</MULTIPOINT>
</FEATURE>
<FEATURE>
<FIELDS>
<FIELD name="ID" value="3" />
<FIELD name="STCODE" value="466910" />
<FIELD name="STNAME" value="鞍部" />
<FIELD name="LONG" value="121.520183333333" />
<FIELD name="LAT" value="25.1865138888889" />
<FIELD name="STX" value="301587.056077921" />
<FIELD name="STY" value="2786745.00316004" />
<FIELD name="#SHAPE#" value="[Geometry]" />
<FIELD name="#ID#" value="3" />
</FIELDS>
<MULTIPOINT>
<POINT x="301587.056077921" y="2786745.00316004"/>
</MULTIPOINT>
</FEATURE>
<FEATURE>
<FIELDS>
<FIELD name="ID" value="4" />
<FIELD name="STCODE" value="466920" />
<FIELD name="STNAME" value="臺北" />
<FIELD name="LONG" value="121.506708333333" />
<FIELD name="LAT" value="25.0396166666667" />
<FIELD name="STX" value="300289.987461941" />
<FIELD name="STY" value="2770468.50369946" />
<FIELD name="#SHAPE#" value="[Geometry]" />
<FIELD name="#ID#" value="4" />
</FIELDS>
<MULTIPOINT>
<POINT x="300289.987461941" y="2770468.50369946"/>
</MULTIPOINT>
</FEATURE>
<FEATURE>
<FIELDS>
<FIELD name="ID" value="5" />
<FIELD name="STCODE" value="466930" />
<FIELD name="STNAME" value="竹子湖" />
<FIELD name="LONG" value="121.536272222222" />
<FIELD name="LAT" value="25.1649861111111" />
<FIELD name="STX" value="303218.153693239" />
<FIELD name="STY" value="2784366.77813037" />
<FIELD name="#SHAPE#" value="[Geometry]" />
<FIELD name="#ID#" value="5" />
</FIELDS>
<MULTIPOINT>
<POINT x="303218.153693239" y="2784366.77813037"/>
</MULTIPOINT>
</FEATURE>
<FEATURECOUNT count="4" hasmore="false" />
</FEATURES>
</RESPONSE>
</ARCXML>

GET_FEATURES

outputmode (binary, xml, newxml)
binary表示傳及收都是compressed binary stream。
newxml回傳型式如上面的例子。
xml會傳回簡短型式的資料
<FEATURE><FIELDS STCODE="466880" STNAME="板橋" /></FEATURE>
加上featurelimit可以限制回傳的資料筆數
加上beginrecord可以指定從第幾筆資料開始回傳。
加上skipfeatures，true表示不傳細項，只回傳有幾筆資料。

subfields

用#ALL#會回傳所有欄位。
加上 #SHAPE# ，如："#SHAPE# STCODE STNAME，會回傳：
<FEATURE> <FIELDS> <FIELD name="STCODE" value="466900" /> <FIELD name="STNAME" value="淡水" /> <FIELD name="#SHAPE#" value="[Geometry]" /> </FIELDS> <MULTIPOINT> <POINT x="293512.984729649" y="2784394.69179442"/> </MULTIPOINT> </FEATURE>

參考資料：

ArcXML Programmer's Reference Guide

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ArcIMS - GET_IMAGE

Posted In: ArcIMS , GIS . By 卡西卡

.NET Link, ArcXML

using ESRI.ArcIMS.Server;

ServerConnection oConn = new ServerConnection();
oConn.Host = "localhost";
oConn.ServiceName = "edbims";
oConn.AppServerPort = 5300;
oConn.Scheme = Scheme.TCP;

System.Text.StringBuilder sAXLText = new System.Text.StringBuilder();
sAXLText.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><ARCXML version=\"1.1\">");
sAXLText.Append("<REQUEST><GET_IMAGE><PROPERTIES>");
// 指定輸出圖檔的寬與高
sAXLText.AppendFormat("<IMAGESIZE width='{0}' height='{1}' />", imgMap.Width.Value , imgMap.Height.Value );
// 指定輸出地圖的範圍
sAXLText.AppendFormat("<ENVELOPE minx='{0}' miny='{1}' maxx='{2}' maxy='{3}' />", minX,minY,maxX,maxY);
sAXLText.Append("</PROPERTIES></GET_IMAGE></REQUEST></ARCXML>");

string response = oConn.Send(sAXLText.ToString());

System.Xml.XmlDocument axlResponse = new System.Xml.XmlDocument();
axlResponse.LoadXml(response); 
if (axlResponse.GetElementsByTagName("OUTPUT").Count == 1)
{ 
 System.Xml.XmlNodeList nodeOutput = axlResponse.GetElementsByTagName("OUTPUT");
 // 指定最後的圖檔URL
 imgMap.ImageUrl = nodeOutput[0].Attributes["url"].Value;
} // if

相關DLL

ESRI.ArcIMS.Server.dll
ESRI.ArcIMS.Server.TCP.dll

重點在於將圖檔大小和地圖範圍填入XML中傳給ArcIMS Server，並解析回傳的結果。

送出
<?xml version="1.0" encoding="UTF-8"?> <ARCXML version="1.1"> <REQUEST> <GET_IMAGE> <PROPERTIES> <IMAGESIZE width='600' height='500' /> <ENVELOPE minx='281113.624997922' miny='2794476.96154711' maxx='319513.624997922' maxy='2765676.96154711' /> </PROPERTIES> </GET_IMAGE> </REQUEST> </ARCXML>

接收
<?xml version="1.0" encoding="UTF-8"?> <ARCXML version="1.1"> <RESPONSE> <IMAGE> <ENVELOPE minx="281113.624997922" miny="2764076.96154711" maxx="319513.624997922" maxy="2796076.96154711" /> <OUTPUT file="F:\ArcIMS\Output\edbims_EMC-AP226763524199.png" url="http://emc-ap2/output/edbims_EMC-AP226763524199.png" /> </IMAGE> </RESPONSE> </ARCXML>

參考資料：

http://gis.ascc.net/ISTIS/tools.html

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