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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I’ve just been playing with this.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>As Frank says – if your Lat/Long
fields are single/double then you need something like:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> '<OGRVRTDataSource><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <OGRVRTLayer name="TestPoint"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <SrcDataSource>ODBC:WKT,TestPoint</SrcDataSource> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <SrcSQL>SELECT X,Y FROM TestPoint WHERE
KeyName=2</SrcSQL><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <GeometryType>wkbPoint</GeometryType> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <GeometryField encoding="PointFromColumns"
x="X" y="Y"/> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </OGRVRTLayer><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </OGRVRTDataSource>'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Note wkbPoint not wkbLine<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If you can convert your GPS readings into
a WKT string and store this in a text field in your table - such as:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>POLYGON (( 100000 100000, 200000 500000,500000 500000,500000 200000,
100000 100000))<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Then something like:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>'<OGRVRTDataSource><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <OGRVRTLayer name="TestPolygon"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <SrcDataSource>ODBC:WKT,TestPolygon</SrcDataSource>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <SrcSQL>SELECT * FROM TestPolygon WHERE
KeyField=1</SrcSQL><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <SrcLayer>TestPolygon</SrcLayer> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <GeometryType>wkbPolygon</GeometryType> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <GeometryField encoding="WKT"
field="GEOMETRY"/><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </OGRVRTLayer><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </OGRVRTDataSource>'<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Should work.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Best wishes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>James<o:p></o:p></span></font></p>
<div>
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face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
Chip Taylor [mailto:work@XWB.COM] <br>
<b><span style='font-weight:bold'>Sent:</span></b> 30 March 2006 16:00<br>
<b><span style='font-weight:bold'>To:</span></b> MAPSERVER-USERS@LISTS.UMN.EDU<br>
<b><span style='font-weight:bold'>Subject:</span></b> [UMN_MAPSERVER-USERS]
Defining a line from SQL server using OGR</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>I am retrieving a set of point from SQL Server using
OGR. If I declare the layer type to be "Point" then it works
fine. However, I want the series of XY coordinates to define a
line. If I declare the layer type "Line" nothing renders.
Any help would be appreciated. Here is the layer code defined as a line
(there are two xy points in the database):<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>#####################################
<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'># Tracking<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>#<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>LAYER<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> NAME GPSLayer1<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> TYPE Point<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> CONNECTIONTYPE OGR<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> CONNECTION <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> '<OGRVRTDataSource><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
<OGRVRTLayer name="GPSData"><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
<SrcDataSource>ODBC:myUser/myPwd@myDSN</SrcDataSource> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
<SrcSQL>EXEC pGetTracking</SrcSQL><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
<GeometryType>wkbLineString</GeometryType><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
<GeometryField encoding="PointFromColumns"
x="gpsLongitude" y="gpsLatitude"/> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
</OGRVRTLayer><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
</OGRVRTDataSource>'<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> DATA "GPSData"<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> CLASSITEM
"gpsDeviceId"<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> STATUS off<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> CLASS<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
EXPRESSION /Device1/<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
STYLE<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
COLOR 90 0 255<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
OUTLINECOLOR 0 255 0 <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
SYMBOL 'BigLine' <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
SIZE 40 <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>
END<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> END<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'> END<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;color:black'>########### End of Tracking
Layer ###############<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
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