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<p class=MsoNormal><span lang=EN-US>Hi everybody<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I just started using the GDAL/OGR CSharp
interface in Visual Studio and it works great. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am trying to append a shapefile to a
postgis table. This I can do with the following lines in ogr2ogr:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Fist import the shapefile to postgis a
table<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>ogr2ogr -f "PostgreSQL"
PG:"dbname='postgis' host='localhost' port='5432' user='...'
password='...'" -lco PRECISION=NO -lco GEOMETRY_NAME=geom -a_srs
EPSG:25832 "c:\temp\testfile.shp"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Then append the same shapefile (this is a
test) to the same postgis table like this<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>ogr2ogr -append -update -f
"PostgreSQL" PG:"dbname='postgis' host='localhost' port='5432'
user='...' password='...'" "c:\temp\testfile.shp"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>But how do I do this in the GDAL/OGR CSharp
interface or which classes and functions do I use?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>So far what I have done is:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Open a layer from the shapefile:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>string fileShp =
@"c:\temp\testfile.shp";<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>DataSource InputDataSource =
Ogr.Open(fileShp, 0);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Layer inputLayer =
InputDataSource.GetLayerByIndex(0);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>FeatureDefn def =
inputLayer.GetLayerDefn();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Open a datasource to postgis:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>OutputDriver =
Ogr.GetDriverByName("PostgreSQL");<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>DataSource OutputDataSource =
OutputDriver.Open("PG:dbname='postgis' host='localhost' port='5432'
user='...' password='...'", 1);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Copy the layer to the postgis table:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Layer outputLayer =
OutputDataSource.CopyLayer(inputLayer, def.GetName(), new string[] {
"GEOMETRY_NAME=geom", "PRECISION=NO" }); //How to add
-a_srs EPSG:25832?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>This works to import the shapefile to a
postgis table. But what should I do when to append the same shapefile to the
postgis a table. So far I have done this:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Open a layer from the shapefile:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>string fileShp =
@"c:\temp\testfile.shp";<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>DataSource InputDataSource =
Ogr.Open(fileShp, 0);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Layer inputLayer =
InputDataSource.GetLayerByIndex(0);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>FeatureDefn def =
inputLayer.GetLayerDefn();<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Open a datasource to postgis:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>OutputDriver =
Ogr.GetDriverByName("PostgreSQL");<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>DataSource OutputDataSource =
OutputDriver.Open("PG:dbname='postgis' host='localhost' port='5432'
user='...' password='...'", 1);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Layer outputLayer =
OutputDataSource.GetLayerByName(def.GetName());<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Feature feat;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>while ((feat = inputLayer.GetNextFeature())
!= null)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> {<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> outputLayer.CreateFeature(feat);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> }<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The CreateFeature functions fails with a
syntax error in the INSERT command. Below is a short version of the command
with the syntax error: <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Command: INSERT INTO "testfile"
("geom" , "ogc_fid" , "name") VALUES
(GeomFromEWKT('SRID=-1;POINT (701678 6152444)'::TEXT) , 0 , Test)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The field "name" is a character
varying in postgis a the command needs single quotes around 'Test'.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>How do I solve this syntax error?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am also wondering how to assign an output
SRS when creating the postgis table like the ogr2ogr flag -a_srs EPSG:25832?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Any help or comment would be appreciated.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal>Regards Esben.<o:p></o:p></p>
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